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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 9007. Отображено 100.
05-01-2012 дата публикации

Resonator

Номер: US20120001700A1
Автор: Robert J. P. Lander
Принадлежит: NXP BV

A method of manufacturing a MEMS resonator formed from a first material having a first Young's modulus and a first temperature coefficient of the first Young's modulus, and a second material having a second Young's modulus and a second temperature coefficient of the second Young's modulus, a sign of the second temperature coefficient being opposite to a sign of the first temperature coefficient at least within operating conditions of the resonator. The method includes the steps of forming the resonator from the first material; applying the second material to the resonator; and controlling the quantity of the second material applied to the resonator by the geometry of the resonator.

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Номер записи: 1
02-02-2012 дата публикации

Rare earth sintered magnet

Номер: US20120024429A1
Автор: Ryouta KUNIEDA, Takuma HAYAKAWA
Принадлежит: TDK Corp

A rare earth sintered magnet includes a main phase that includes an R 2 T 14 B phase of crystal grain where R is one or more rare earth elements including Nd, T is one or more transition metal elements including Fe or Fe and Co, and B is B or B and C; a grain boundary phase in which a content of R is larger than a content of the R 2 T 14 B phase; and a grain boundary triple point that is surrounded by three or more main phases. The grain boundary triple point includes an R75 phase containing R of 60 at % to 90 at %, Co, and Cu. The relational expression 0.05≦(Co+Cu)/R<0.5 is satisfied. An area where a Co-rich region overlaps with a Cu-rich region in a cross-sectional area of the grain boundary triple point is 60% or more.

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Номер записи: 2
09-02-2012 дата публикации

Alloy for sintered r-t-b-m magnet and method for producing same

Номер: US20120032764A1
Автор: Futoshi Kuniyoshi
Принадлежит: Hitachi Metals Ltd

In order to make a sintered R-T-B-M magnet so that R 2 T 14 B phases that include a lot of Dy in the surface region of the main phase are distributed over the entire magnet, a region including a heavy rare-earth element RH at a high concentration is formed continuously beforehand at an interface between the crystals of an R 2 T 14 B compound that is the main phase of the sintered R-T-B-M magnet and the other phases.

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Номер записи: 3
23-02-2012 дата публикации

Article for Magnetic Heat Exchange and a Method of Fabricating a Working Component for Magnetic Heat Exchange

Номер: US20120045633A1
Автор: ALEXANDER Barcza, Matthias Katter, Volker Zellmann
Принадлежит: Vacuumschmelze GmbH and Co KG

An article for magnetic heat exchange comprises a monolithic working component comprising two or more portions. The two or more portions comprise amounts of La, Fe, Si and of one or more elements T and R suitable to produce a La 1-a R a (Fe 1-x-y T y Si x ) 13 H z phase, wherein T is one or more of the elements from the group consisting of Mn, Co, Ni and Cr and R is one or more of the elements from the group consisting of Ce, Nd, Y and Pr. The amount of the one or more elements T and R and the amount of Si is selected for each of the two or more portions to provide the two or more portions with differing Curie temperatures and, preferably, a density, d, within a range of ±5% of an average density, d av , of a total number of portions.

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Номер записи: 4
08-03-2012 дата публикации

Electrocaloric heat transfer

Номер: US20120055174A1
Автор: Ezekiel Kruglick
Принадлежит: Individual

Techniques for transferring heat from a heat source to a heat destination, and systems for transferring heat from a heat source to a heat destination are provided. More particularly, techniques and systems for transferring heat by utilizing one or more electrocaloric heat pumps are provided. An example heat pump may include an electrocaloric element for receiving heat from a heat source, and a chamber containing a phase change material, an evaporator and a condenser. Upon altering the voltage applied to the electrocaloric element, the phase change material may transform from a liquid state to a vapor state to transfer heat away from the heat source.

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Номер записи: 5
15-03-2012 дата публикации

Magnetocaloric refrigerator

Номер: US20120060513A1
Автор: Jan Vetrovec
Принадлежит: Individual

The invention is for an apparatus and method for a refrigerator and a heat pump based on the magnetocaloric effect (MCE) offering a simpler, lighter, robust, more compact, environmentally compatible, and energy efficient alternative to traditional vapor-compression devices. The subject magnetocaloric apparatus alternately exposes a suitable magnetocaloric material to strong and weak magnetic field while switching heat to and from the material by a mechanical commutator using a thin layer of suitable thermal interface fluid to enhance heat transfer. The invention may be practiced with multiple magnetocaloric stages to attain large differences in temperature. Key applications include thermal management of electronics, as well as industrial and home refrigeration, heating, and air conditioning. The invention offers a simpler, lighter, compact, and robust apparatus compared to magnetocaloric devices of prior art. Furthermore, the invention may be run in reverse as a thermodynamic engine, receiving low-level heat and producing mechanical energy.

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Номер записи: 6
29-03-2012 дата публикации

magnetic material

Номер: US20120076684A1
Автор: James W. Herchenroeder, Zhongmin Chen
Принадлежит: Magnequench International LLC

There is disclosed a magnetic material having a composition in atomic percentage of: (MM 1-a R a ) u Fe 100-u-v-w-x-y Y v M w T x B y wherein MM is a mischmetal or a synthetic equivalent thereof; R is Nd, Pr or a combination thereof; Y is a transition metal other than Fe; M is one or more of a metal selected from Groups 4 to 6 of the periodic table; and T is one or more of a metal other than B, selected from Groups 11 to 14 of the periodic table, wherein 0≦a≦1, 7≦u≦13, 0≦v≦20, 0≦w≦5; 0≦x≦5 and 4≦y≦12.

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Номер записи: 7
10-05-2012 дата публикации

Treating solution for forming fluoride coating film and method for forming fluoride coating film

Номер: US20120111232A1
Автор: Matahiro Komuro, Mitsuo Katayose, Shigeaki Funyu, Yoshii Morishita, Yuichi Satsu
Принадлежит: Individual

A conventional method for forming an insulating film on a magnet has a difficulty in achieving sufficient improvement in magnetic characteristics due to nonuniformity of a coating film, and an extended time and higher temperature which are required in a thermal treatment. In order to solve the problems, the present invention provides a treating solution composed of an alcohol based solvent and a rare earth fluoride or alkaline earth metal fluoride dispersing in the solvent. In the treating solution, at least one X-ray diffraction peak has a half-value width larger than 1°. The present invention also provides a method for forming an insulating film using the treating solution.

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Номер записи: 8
19-07-2012 дата публикации

Permanent magnet and manufacturing method thereof

Номер: US20120181476A1
Автор: Izumi Ozeki, Katsuya Kume, Keisuke Hirano, Keisuke Taihaku, Takashi Ozaki, Tomohiro Omure, Toshinobu Hoshino
Принадлежит: Nitto Denko Corp

There are provided a permanent magnet and a manufacturing method thereof capable of efficiently concentrating traces of Dy or Tb in grain boundaries of the magnet and sufficiently improving coercive force due to Dy or Tb while reducing amount of Dy or Tb to be used. To fine powder of milled neodymium magnet material is added an organometallic compound solution containing an organometallic compound expressed with a structural formula of M-(OR) x (M represents Dy or Tb, R represents a substituent group consisting of a straight-chain or branched-chain hydrocarbon, x represents an arbitrary integer) so as to uniformly adhere the organometallic compound to particle surfaces of the neodymium magnet powder. Thereafter, a compact body compacted through powder compaction is held for several hours in hydrogen atmosphere at 200 through 900 degrees Celsius for a hydrogen calcination process. Thereafter, through sintering process, the compact body is formed into a permanent magnet.

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Номер записи: 9
24-01-2013 дата публикации

Rare-earth permanent magnetic powder, bonded magnet, and device comprising the same

Номер: US20130020527A1
Автор: Dunbo Yu, HONGWEI Li, Kuoshe LI, Min Wang, Shipeng Li, Yang Luo, Yongqiang YUAN
Принадлежит: Grirem Advanced Materials Co Ltd

A rare-earth permanent magnetic powder, a bonded magnet, and a device comprising the bonded magnet are provided. The rare-earth permanent magnetic powder is mainly composed of 7-12 at % of Sm, 0.1-1.5 at % of M, 10-15 at % of N, 0.1-1.5 at % of Si, and Fe as the balance, wherein M is at least one element selected from the group of Be, Cr, Al, Ti, Ga, Nb, Zr, Ta, Mo, and V, and the main phase of the rare-earth permanent magnetic powder is of TbCu 7 structure. Element Si is added into the rare-earth permanent magnetic powder for increasing the ability of SmFe alloy to from amorphous structure, and for increasing the wettability of the alloy liquid together with the addition of element M in a certain content, which enables the alloy liquid prone to be injected out of a melting device. The average diameter of the rare-earth permanent magnetic powder is in the range of 10-100 μm, and the rare-earth permanent magnetic powder is composed of nanometer crystals with average grain size of 10-120 nm or amorphous structure

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Номер записи: 10
21-03-2013 дата публикации

Heterogeneous Electrocaloric Effect Heat Transfer

Номер: US20130067935A1
Автор: Ezekiel Kruglick
Принадлежит: Individual

Technologies are generally described herein for electrocaloric effect heat transfer devices, methods, and systems that may be effective to efficiently transfer and distribute thermal energy from a heat source utilizing coordinated application of out of phase electric signals to adjacent heat transfer stacks coupled with a thermal distribution layer. Some electrocaloric effect heat transfer stacks may include alternating layers of electrocaloric effect material and thermal rectifier material. The out of phase electric signals produce electric fields that bias the electrocaloric effect material of one heat transfer stack to a hot phase, emitting thermal energy, while biasing the electrocaloric effect material of an adjacent heat transfer stack to a cold phase, absorbing thermal energy. The thermal distribution layer allows for thermal energy from the material in the hot phase to be distributed to the material of the adjacent stack in the cold phase rather than back to the heat source.

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Номер записи: 11
11-04-2013 дата публикации

METHOD FOR PRODUCING R-T-B-BASED SINTERED MAGNETS

Номер: US20130087248A1
Автор: Kuniyoshi Futoshi
Принадлежит:

A method for producing a sintered R-T-B based magnet includes the steps of: providing a sintered R-T-B based magnet body ; providing an RH diffusion source including a heavy rare-earth element RH (which is at least one of Dy and Tb) and 30 mass % to 80 mass % of Fe; loading the sintered R-T-B based magnet body and the RH diffusion source into a processing chamber so that the magnet body and the diffusion source are movable relative to each other and are readily brought close to, or in contact with, each other; and performing an RH diffusion process in which the sintered magnet body and the RH diffusion source are heated to a processing temperature of more than 850° C. through 1000° C. while being moved either continuously or discontinuously in the processing chamber. 1. A method for producing a sintered R-T-B based magnet , the method comprising the steps of:providing a sintered R-T-B based magnet body;providing an RH diffusion source including a heavy rare-earth element RH (which is at least one of Dy and Tb) and 30 mass % to 80 mass % of Fe;loading the sintered magnet body and the RH diffusion source into a processing chamber so that the magnet body and the diffusion source are movable relative to each other and are readily brought close to, or in contact with, each other; andperforming an RH diffusion process in which the sintered magnet body and the RH diffusion source are heated to a processing temperature of more than 850° C. through 1000° C. while being moved either continuously or discontinuously in the processing chamber.2. The method of claim 1 , wherein the processing temperature is 870° C. to 1000° C.3. The method of claim 1 , wherein the RH diffusion source includes 40 mass % to 80 mass % of Fe.4. The method of claim 1 , wherein the RH diffusion source includes 40 mass % to 60 mass % of Fe.5. The method of claim 1 , wherein the RH diffusion process includes the step of rotating the processing chamber.6. The method of claim 1 , wherein in the RH ...

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Номер записи: 12
09-05-2013 дата публикации

TREATMENT DEVICE

Номер: US20130112141A1
Автор: Kuniyoshi Futoshi, Nakayama Shohji
Принадлежит: HITACHI METALS ,LTD.

A processing system according to the present invention includes: a diffusion processing section which heats a sintered R-T-B based magnet body and an RH diffusion source made of either a metal or alloy of a heavy rare-earth element RH (which is at least one of Dy and Tb) while rotating; a sorting section which selectively sorts the RH diffusion source from the sintered R-T-B based magnet body when the diffusion source and the magnet body come from the diffusion processing section ; and a heat treatment processing section which conducts a heat treatment process on the sintered R-T-B based magnet body , in which the heavy rare-earth element RH has been diffused and from which the RH diffusion source has been removed. 1: A processing system comprising:a diffusion processing section which heats an RH diffusion source made of either a metal or alloy of a heavy rare-earth element RH (which is at least one of Dy and Tb) and a sintered R-T-B based magnet body while rotating;a sorting section which is adjacent to the diffusion processing section and which selectively sorts the RH diffusion source from the sintered R-T-B based magnet body when the diffusion source and the magnet body come from the diffusion processing section; anda tilting mechanism which tilts the diffusion processing section and the sorting section.2: The processing system of claim 1 , wherein the sorting section has a plurality of holes to eject the RH diffusion source out of itself claim 1 , each said hole having a smaller size than the sintered R-T-B based magnet body.3: The processing system of claim 1 , wherein the sorting section sends the sintered R-T-B based magnet body back to the diffusion processing section while being rotated claim 1 , andwherein the diffusion processing section does a heat treatment on the sintered R-T-B based magnet body that has come back from the sorting section.4: The processing system of claim 1 , wherein the diffusion processing section has a first outer wall portion that ...

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Номер записи: 13
30-05-2013 дата публикации

Magnetic Materials and Systems

Номер: US20130134348A1
Автор: BARVE Jayeshkumar Jayanarayan, BHAT Shyamala Halady Subraya, Johnson Francis, Reddy Sudhakar Eddula
Принадлежит: GENERAL ELECTRIC COMPANY

A material is disclosed. The material includes a magnetic material. The magnetic material exhibits a metamagnetic transition to a magnetic saturation at an applied magnetic field of strength less than or equal to 1 T, in which a transition temperature of the magnetic material is within a temperature region from about 160 K to about 350K. 1. A material comprising:a magnetic material exhibiting a metamagnetic transition to a magnetic saturation at an applied magnetic field of strength less than or equal to 1 T, wherein a transition temperature of the magnetic material is within a temperature region from about 160 K to about 350K.2. The material of claim 1 , wherein the strength of the applied magnetic field is less than or equal to about 0.75 T.3. The material of claim 1 , wherein the temperature region is from about 180K to about 325K.4. The material of claim 1 , wherein the magnetic material belongs to cubic D2crystal structure.5. The material of claim 1 , wherein the magnetic material comprises a rare earth element claim 1 , a 3d transition element claim 1 , a secondary element claim 1 , and a dopant claim 1 , wherein the magnetic moment of the dopant is more than the magnetic moment of the rare earth element.6. The material of claim 5 , wherein the magnetic material comprises lanthanum claim 5 , iron claim 5 , silicon claim 5 , and the dopant.7. The material of claim 6 , wherein the dopant comprises a rare earth element claim 6 , a 3d transition element claim 6 , or a combination thereof.8. The material of claim 7 , wherein the rare earth element dopant comprises gadolinium claim 7 , terbium claim 7 , dysprosium claim 7 , praseodymium claim 7 , holmium claim 7 , erbium claim 7 , or a combination thereof.9. The material of claim 7 , wherein the 3d transition element dopant comprises vanadium claim 7 , chromium claim 7 , manganese claim 7 , iron claim 7 , cobalt claim 7 , nickel claim 7 , copper claim 7 , zinc claim 7 , or combinations thereof.10. The material of ...

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Номер записи: 14
30-05-2013 дата публикации

DS SUPERALLOY AND COMPONENT

Номер: US20130136649A1
Автор: Esser Winfried, Paul Uwe, Piegert Sebastian
Принадлежит:

A nickel-based DS alloy for directional solidification, includes Cobalt (Co), Chromium (Cr), Molybdenum (Mo), Tungsten (W), Tantalum (Ta), Titanium (Ti), Aluminum (Al), Rhenium (Re), Hafnium (Hf), Boron (B), Carbon (C), and Zirconium (Zr). Further, a component, for example a turbine blade or vane, with such an alloy is provided. 2. The nickel-based alloy as claimed in claim 1 , wherein the alloy comprises nickel as the remainder.3. The nickel-based alloy as claimed in claim 1 , wherein Niobium (Nb) is excluded.4. The nickel-based alloy as claimed in claim 1 , wherein Ruthenium (Ru) is excluded.5. The nickel-based alloy as claimed in claim 1 , consisting of the elements Nickel claim 1 , Cobalt claim 1 , Chromium claim 1 , Molybdenum claim 1 , Tungsten claim 1 , Tantalum claim 1 , Titanium claim 1 , Aluminum claim 1 , Rhenium claim 1 , Hafnium claim 1 , Boron claim 1 , Carbon and Zirconium.6. The nickel-based alloy as claimed in claim 1 , wherein Silicon (Si) is excluded.7. The nickel-based alloy as claimed in claim 1 , wherein Gallium (Ga) and/or Germanium (Ge) is/are excluded.9. A component claim 1 , comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'a nickel-based alloy as claimed in .'}10. The component as claimed in claim 8 , further comprising:grains solidified in columnar form. This application claims priority of European Patent Office Application No. 11190432.2 EP filed Nov. 24, 2011. All of the applications are incorporated by reference herein in their entirety.An improved nickel-based superalloy for producing components having columnar grains is provided.To increase the performance and to achieve a higher efficiency for gas turbines, the thermo-mechanical and oxidative loads to which the turbine blades or vanes are subject are becoming increasingly higher during operation. This requires firstly a higher complexity of the components for better cooling, above all in the cooling-gas passage, and secondly cast alloys with ever greater strength. This ...

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Номер записи: 15
06-06-2013 дата публикации

HIGH CARBON CHROMIUM BEARING STEEL, AND PREPARATION METHOD THEREOF

Номер: US20130139991A1
Автор: KIM Kwan-Ho
Принадлежит: POSCO

Provided is bearing steel having excellent fatigue life by minimizing segregation during casting of the bearing steel and reducing the generation of large carbides in a segregation band. The high-carbon chromium bearing steel includes 0.5 wt % to 1.2 wt % of carbon (C), 0.15 wt % to 2.0 wt % of silicon (Si), 0.05 wt % to 0.45 wt % of manganese (Mn), 0.025 wt % or less (excluding 0 wt %) of phosphorus (P), 0.025 wt % or less (excluding 0 wt %) of sulfur (S), 0.1 wt % to 1.6 wt % of chromium (Cr), 0.01 wt % to 0.3 wt % of Ce, and iron (Fe) as well as other unavoidable impurities as a remainder. A method of manufacturing the steel is also provided. 1. High-carbon chromium bearing steel comprising:0.5 wt % to 1.2 wt % of carbon (C);0.15 wt % to 2.0 wt % of silicon (Si);0.05 wt % to 0.45 wt % of manganese (Mn);0.025 wt % or less (excluding 0 wt %) of phosphorus (P);0.025 wt % or less (excluding 0 wt %) of sulfur (S);0.1 wt % to 1.6 wt % of chromium (Cr);0.01 wt % to 0.3 wt % of cerium (Ce); andiron (Fe) as well as other unavoidable impurities as a remainder.2. The high-carbon chromium bearing steel of claim 1 , wherein the bearing steel comprises an inoculant and a Ce compound is included as the inoculant.3. The high-carbon chromium bearing steel of claim 2 , wherein the Ce compound is one or more selected from the group consisting of Ce oxides claim 2 , Ce nitrides claim 2 , and Ce carbides.4. The high-carbon chromium bearing steel of claim 2 , wherein the Ce compound is one or more selected from the group consisting of AlCeO claim 2 , CeO claim 2 , CeOS claim 2 , CeS claim 2 , CeS claim 2 , and CeO.5. The high-carbon chromium bearing steel of claim 2 , wherein a lattice misfit of the Ce compound with a casting structure of the bearing steel is 15% or less.6. The high-carbon chromium bearing steel of claim 2 , wherein the Ce compound has a spherical shape and an average grain diameter of the Ce compound is 20 μm or less.7. The high-carbon chromium bearing steel of claim ...

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Номер записи: 16
06-06-2013 дата публикации

Method and Apparatus for Electricity Generation Using Electromagnetic Induction Including Thermal Transfer Between Vortex Flux Generator and Refrigerator Compartment

Номер: US20130140945A1
Автор: Adams Richard
Принадлежит:

System and method for generating and storing electricity by electromagnetic induction using a magnetic field modulated by the formation, dissipation, and movement of vortices produced by a vortex material such as a type II superconductor and further including a vortex flux generator in cryostat and a refrigerant compartment having bi-directionally thermal transfer to the vortex flux generator. Magnetic field modulation occurs at the microscopic level, facilitating the production of high frequency electric power. Generator inductors are manufactured using microelectronic fabrication, in at least one dimension corresponding to the spacing of vortices. The vortex material fabrication method establishes the alignment of vortices and generator coils, permitting the electromagnetic induction of energy from many vortices into many coils simultaneously as a cumulative output of electricity. A thermoelectric cycle is used to convert heat energy into electricity. 1. A vortex flux refrigerator comprising: a magnetic circuit for producing a magnetic field;', 'vortex material for forming and subsequently dissipating a vortex, whereby upon formation of the vortex, the magnetic field density surrounding the vortex is urged to decrease, and whereby upon subsequent dissipation of the vortex, said urging to decrease ceases, allowing said magnetic field density to increase to its former density prior to the formation of the vortex, the increase and decrease of the magnetic field constituting a modulation of the magnetic field;', 'an inductor comprised of an electrically conducting material segment disposed in the vicinity of the vortex, such that the kinetic energy of the modulation of the magnetic field is transferred by electromagnetic induction into the energy of an electrical current in the inductor, the electrical current constituting generated electricity; and, 'a vortex flux generator includinga refrigerated compartment operably coupled to the vortex flux generator, the ...

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Номер записи: 17
06-06-2013 дата публикации

METHOD FOR PRODUCING ALLOY CAST SLAB FOR RARE EARTH SINTERED MAGNET

Номер: US20130142687A1
Автор: Onimura Takuya, Tabata Shinya
Принадлежит: SANTOKU CORPORATION

Provided are alloy flakes for rare earth sintered magnet, which achieve a high rare earth component yield after pulverization with respect to before pulverization and a uniform particle size after pulverization, and a method for producing such alloy at high energy efficiency in an industrial scale. The method includes (A) preparing an alloy melt containing R composed of at least one element selected from rare earth metal elements including Y, B, and the balance M composed of Fe, or of Fe and at least one element selected from transition metal elements other than Fe, Si, and C, (B) rapidly cooling/solidifying the alloy melt to not lower than 700° C. and not higher than 1000° C. by strip casting with a cooling roll, and (C) heating and maintaining, in a particular temperature range, alloy flakes separated from the roll by rapid cooling and solidifying in step (B) before the flakes are cooled to not higher than 500° C., to obtain alloy flakes having a composition of 27.0 to 33.0 mass % R, 0.90 to 1.30 mass % boron, and the balance M. 1. A method for producing alloy flakes for a rare earth sintered magnet , said alloy flakes having a composition of 27.0 to 33.0 mass % R consisting of at least one element selected from the group consisting of rare earth metal elements including yttrium , 0.90 to 1.30 mass % boron , and the balance M consisting of iron , or of iron and at least one element selected from the group consisting of transition metal elements other than iron , silicon , and carbon , said method comprising the steps of:(A) preparing an alloy melt comprising R, boron, and the balance M,(B) rapidly cooling and solidifying said alloy melt by strip casting with a cooling roll down to not lower than 700° C. and not higher than 1000° C., and(C) heating alloy flakes separated from the cooling roll by said rapid cooling and solidifying in step (B), before said alloy flakes are cooled down to not higher than 500° C., wherein said heating in step (C) is effected by ...

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Номер записи: 18
20-06-2013 дата публикации

Low-neodymium, non-heavy-rare-earth and high performance magnet and preparation method

Номер: US20130154778A1
Автор: FANG Yikun, FENG Haibo, HUANG Shulin, Li Wei, LI Yanfeng, WANG Jingdai, WANG Xuchao, ZHOU Mingge, ZHU Minggang
Принадлежит: Central Iron and Steel Research Institute

The invention discloses a low-neodymium, non-heavy-rare-earth and high-performance magnet and its preparing method, and belongs to technical field of rare earth permanent magnetic material. The magnet has a chemical formula of [(Nd, Pr)(CeLa)]FeBTM, wherein x, y, a, b and c represent mass percents of corresponding elements respectively, 0≦x≦40%, 0≦y≦15%, 29≦a≦30%, 0.5≦b≦5%, 0.5≦c≦5%; and TM is one or more selected from Ga, Co, Cu, Nb and Al elements. A series of grades of magnets can be prepared with rapidly solidified strips of only three components. Component proportioning of magnet can also be directly performed by using mixed rare earth, so that the cost increased by further separation and purification of the rare earth is reduced. During the preparation of magnetic powder with a jet mill, an antioxidant lubricant which is composed of alcohol, gasoline and basic synthetic oil is added. A low-temperature sintering technology is adopted; and the sintering temperature is 1, 010-1, 050° C. and the annealing temperature is 450-550° C. The magnetic energy product (BH)is more than 40 MGOe; and the coercive force His more than 10 kOe. The production time and the energy loss can be significantly reduced. 1. A low-neodymium , no heavy rare earth elements and high-performance magnet , its chemical formula is [(Nd , Pr)(CeLa)]FeBTM , wherein , x , y , a , b and c represent respectively the mass percent of the corresponding elements , and 10%≦x≦40% , 0%≦y≦15% , 29%≦a≦30% , 0.8%≦b≦1.5% and 0.5%≦c≦2% , TM is one or more selected from Ga , Co , Cu , Nb and Al.2. A method to prepare the low-neodymium claim 1 , no heavy rare earth elements and high-performance magnet as claim 1 , wherein the method comprises:{'sub': 100-x', '100-y', 'y', 'a', '100-a-b-c', 'b', 'c', 'a', '100-a-b-c', 'b', 'c, '(1) preparing the raw materials respectively according to the nominal composition of Nd—Fe—B alloy in mass percent: [Nd(CeLa)x]FeBTM(wt. %) and (Nd, Pr)FeBTM(wt. %), wherein 10%≦x≦40%, 0%≦y≦ ...

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Номер записи: 19
27-06-2013 дата публикации

SHAPE MEMORY STAINLESS STEELS WITH RARE EARTH ELEMENTS Ce AND La

Номер: US20130160900A1
Автор: SHETTY Kishora
Принадлежит: Airbus Engineering Centre India

Shape memory stainless steels with rare earth elements Cerium (Ce) and Lanthanum (La) are disclosed. In one embodiment, raw materials including Manganese (Mn), Silicon (Si), Chromium (Cr), Nickel (Ni), Carbon (C), Ce, La and Iron (Fe) are melted to form a molten alloy of the shape memory stainless steels with rare earth elements Ce and La. Further, the molten alloy is solidified to form an ingot. Furthermore, the ingot is subjected to nondestructive evaluation to assess internal soundness of the ingot. In addition, the evaluated ingot is homogenized to form homogenized shape memory stainless steels with rare earth elements Ce and La. 1. Shape memory stainless steels with rare earth elements Cerium (Ce) and Lanthanum (La) , which comprise , Manganese (Mn) , Silicon (Si) , Chromium (Cr) , Nickel (Ni) , Carbon (C) , Ce , La and Iron (Fe).2. The shape memory stainless steels of claim 1 , wherein the shape memory stainless steels with rare earth elements Ce and La comprise claim 1 , by weight claim 1 , about 15 to 17% of Mn claim 1 , about 5 to 6% of Si claim 1 , about 9 to 12% of Cr claim 1 , about 8 to 10% of Ni claim 1 , about 0.03 to 0.06% of C claim 1 , about 0.10 to 0.50% of Ce claim 1 , about 0.5 to 1.0% of La and the balance being Fe.3. The shape memory stainless steels of claim 2 , wherein the shape memory stainless steels with rare earth elements Ce and La further comprise:unavoidable impurities.4. A method of forming shape memory stainless steels with rare earth elements Cerium (Ce) and Lanthanum (La) claim 2 , comprising:melting raw materials including Manganese (Mn), Silicon (Si), Chromium (Cr), Nickel (Ni), Carbon (C), Ce, La and Iron (Fe) to form a molten alloy of the shape memory stainless steels with rare earth elements Ce and La;solidifying the molten alloy to form an ingot;subjecting the ingot to nondestructive evaluation to assess internal soundness of the ingot; andhomogenizing the evaluated ingot to form homogenized shape memory stainless steels ...

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Номер записи: 20
04-07-2013 дата публикации

NdFeB Sintered Magnet and Method for Producing the Same

Номер: US20130169394A1
Автор: Fujimoto Naoki, SAGAWA Masato
Принадлежит: INTERMETALLICS CO., LTD.

A method for producing an NdFeB sintered includes forming a layer containing Dy and/or Tb on the surface of an NdFeB sintered magnet base material and then performing a grain boundary diffusion process for diffusing Dy and/or Tb from the aforementioned layer through the crystal grain boundaries of the magnet base material into the magnet base material by heating the magnet base material to a temperature equal to or lower than the sintering temperature thereof. In this method: a) the content of a rare earth in a metallic state in the magnet base material is equal to or higher than 12.7 at %; b) the aforementioned layer is a powder layer formed by depositing a powder; and c) the powder layer contains Dy and/or Tb in a metallic state by an amount equal to or higher than 50 mass %. 1. A method for producing an NdFeB sintered magnet , comprising:forming a layer containing Dy and/or Tb on a surface of an NdFeB sintered magnet base material; and thenperforming a grain boundary diffusion process for diffusing Dy and/or Tb from the layer through crystal grain boundaries of the magnet base material into the magnet base material by heating the magnet base material to a temperature equal to or lower than a sintering temperature thereof;wherein:a) a content of a rare earth in a metallic state in the magnet base material is equal to or higher than 12.7 at %;b) the layer is a powder layer formed by depositing a powder; andc) the powder layer contains 50 mass % or more Dy and/or Tb in a metallic state.2. The method for producing an NdFeB sintered magnet according to claim 1 , wherein an amount of the powder layer on the surface the magnet base material is equal to or more than 7 mg/cm.3. The method for producing an NdFeB sintered magnet according to claim 1 , wherein the powder layer is melted during the grain boundary diffusion process.4. An NdFeB sintered magnet with Dy and/or Tb diffused through grain boundaries by a grain boundary diffusion method claim 1 , wherein:a magnet ...

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Номер записи: 21
18-07-2013 дата публикации

MAGNETIC COOLING APPARATUS AND CONTROL METHOD THEREOF

Номер: US20130180263A1
Автор: CHOI Woo Hyek, Kim Min Soo, MUN II Ju
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A magnetic cooling apparatus and a control method thereof are provided. The magnetic cooling apparatus provides a replacement having a simplified structure for motors providing driving force and power transmission systems of reciprocation type and rotation type cooling apparatuses. The magnetic cooling apparatus includes magnets forming a magnetic field, magnetic regeneration units formed of a magnetocaloric material that are provided with coils, and using electromagnetic force, generated when currents are supplied to the coils in the magnetic field, as kinetic energy, and a controller controlling the currents supplied to the coils of the magnetic regeneration units to control moving speeds and directions of the magnetic regeneration units. 1. A magnetic cooling apparatus comprising:a plurality of magnets forming a magnetic field;a magnetic regeneration unit formed of a magnetocaloric material, provided with coils, and using an electromagnetic force, generated when currents are supplied to the coils in the magnetic field, as kinetic energy;a hot water side flow path formed through the magnetic regeneration unit when the magnetic regeneration unit is magnetized inside of the magnetic field;a cold water side flow path formed through the magnetic regeneration unit when the magnetic regeneration unit is demagnetized outside of the magnetic field; anda controller controlling current supply to the coils of the magnetic regeneration unit so that the magnetic regeneration unit is magnetized while passing through the magnetic field and demagnetized while exiting the magnetic field, and thus controlling movement of the magnetic regeneration unit to achieve cooling by temperature lowering generated by demagnetization of the magnetic regeneration unit.2. The magnetic cooling apparatus according to claim 1 , wherein the controller:controls the moving speeds of the magnetic regeneration unit by controlling the intensities of the currents supplied to the coils; andcontrols the ...

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Номер записи: 22
25-07-2013 дата публикации

Method for generating giant magnetocaloric materials

Номер: US20130186108A1
Автор: Ekkehard Brueck, Robert Art DE GROOT
Принадлежит: BASF SE

The invention relates to a method for generating giant magnetocaloric materials, the giant magnetocaloric materials obtained thereby and their use in magnetocaloric heat pumps, magnetocaloric power converters, actuators or magnetic switches.

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Номер записи: 23
01-08-2013 дата публикации

Magnetocaloric module for magnetic refrigeration apparatus

Номер: US20130192269A1
Автор: Min-Chia Wang, Sheng-Fan HSIEH, Tiao-Yuan WU
Принадлежит: Delta Electronics Inc

A magnetocaloric module for a magnetic refrigeration apparatus includes: a bed having an inner surface; a magnetocaloric material filled in the bed; and an insulating layer formed over the inner surface, isolating the magnetocaloric material from the bed. With the use of the insulating layer, thermal conduction between the magnetocaloric material and the bed can be reduced and Galvanic corrosion which may occur to the bed can be prevented. Also, a temperature gradient of the magnetocaloric module may be further extended.

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Номер записи: 24
08-08-2013 дата публикации

LA(FE,SI)13-BASED MULTI-INTERSTITIAL ATOM HYDRIDE MAGNETIC REFRIGERATION MATERIAL WITH HIGH TEMPERATURE STABILITY AND LARGE MAGNETIC ENTROPY CHANGE AND PREPARATION METHOD THEREOF

Номер: US20130200293A1
Автор: Gong Huayang, Hu Fengxia, Li Yangxian, Shen Baogen, Shen Jun, Sun Jirong, Wang Xiaohuan, Yin Jianxiong, Zhao Jinliang
Принадлежит:

The invention discloses a La(Fe,Si)-based hydride magnetic refrigeration material comprising multiple interstitial atoms and showing a high-temperature stability and a large magnetic entropy change and the method for preparing the same. By reintroducing interstitial hydrogen atoms into an interstitial master alloy LaRFeSiXthrough a hydrogen absorption process, a compound with a chemical formula of LaRFeSiXHand a cubic NaZn-type structure is prepared, wherein R is one or a combination of more than one rare-earth element, X is one or more C, B and the like or their combinations. A desired amount of hydrogen is obtained through a single hydrogen absorption process by means of controlling the hydrogen pressure, temperature and period in the process of hydrogen absorption. The compound can be stable under normal pressure, at a temperature of room temperature to 350° C., that is, the hydrogen atoms can still exist stably in the interstices. The Curie temperature of the compound can be adjusted continuously with a wide range of 180K to 360K by changing its composition. The magnetic entropy change that is more than 2 folds of that of Gd can be obtained around room temperature, and the magnetic hysteresis loss vanishes. In view of the above, this material is a desired magnetic refrigeration material applied at room temperature. 1. A La(Fe ,Si)-based hydride magnetic refrigeration material comprising multiple interstitial atoms and showing a high-temperature stability and a large magnetic entropy change , wherein , the material has a chemical formula of LaRFeSiXH , and has a cubic NaZn13-type structure , wherein:R is one of or any combination of the following rare-earth elements Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, and Sc which satisfy the requirement for a, if R is Ce, then 0 Подробнее

Номер записи: 25
29-08-2013 дата публикации

Method of manufacturing magnet, and magnet

Номер: US20130222093A1
Автор: Kazuhisa Sugiyama, Toshiyuki Baba
Принадлежит: JTEKT Corp

A hard magnetic material formed of material powders made of a R—Fe—N compound containing a light rare earth element as R, or material powders made of a Fe—N compound is used as material powders. There is formed a compact in which a density of the hard magnetic material powders differs between an outer face side portion and an inside portion of the compact such that a rate of progress of powder bonding due to microwave heating is higher in the inside portion of the compact than in the outer face side portion of the compact when an outer face of the compact is irradiated with microwaves. Then, the outer face of the compact is irradiated with the microwaves to cause the microwave heating, thereby bonding the hard magnetic material powders by oxide films which are formed on the hard magnetic material powders.

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Номер записи: 26
05-09-2013 дата публикации

MAGNETIC REFRIGERATION SYSTEM

Номер: US20130227965A1
Автор: KAJI Shiori, KOBAYASHI Tadahiko, SAITO Akiko, YAGI Ryosuke
Принадлежит: KABUSHIKI KAISHA TOSHIBA

According to one embodiment, a magnetic refrigeration system includes a first heat exchange section, a magnetic field changing section, a first heat transport medium, a second heat transport medium, and a transport section. The first heat exchange section includes a magnetocaloric effect material. The magnetic field changing section is configured to change magnetic field to the first heat exchange section. The second heat transport medium is separated from the first heat transport medium. The second heat transport medium is different from the first heat transport medium in specific heat per unit volume. The transport section is configured to sequentially feed the first heat exchange section with the first heat transport medium and the second heat transport medium. 1. A magnetic refrigeration system comprising:a first heat exchange section including a magnetocaloric effect material;a magnetic field changing section configured to change magnetic field to the first heat exchange section;a first heat transport medium;a second heat transport medium separated from the first heat transport medium and being different from the first heat transport medium in specific heat per unit volume; anda transport section configured to sequentially feed the first heat exchange section with the first heat transport medium and the second heat transport medium.2. The system according to claim 1 , whereinthe transport section feeds the first heat exchange section with the first heat transport medium having a higher specific heat per unit volume than the second heat transport medium, andthe magnetic field changing section applies the magnetic field to the first heat exchange section to cause the heat exchange section to generate heat.3. The system according to claim 1 , whereinthe transport section feeds the first heat exchange section with the first heat transport medium having a higher specific heat per unit volume than the second heat transport medium, andthe magnetic field changing ...

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Номер записи: 27
12-09-2013 дата публикации

HEAT EXCHANGER AND MAGNETIC REFRIGERATION SYSTEM

Номер: US20130232993A1
Автор: KAJI Shiori, KOBAYASHI Tadahiko, SAITO Akiko
Принадлежит: KABUSHIKI KAISHA TOSHIBA

According to one embodiment, a heat exchanger includes a container, and a plurality of heat exchange components. The container is fed with a heat transport medium. The plurality of heat exchange components is provided with a prescribed spacing inside the container. The plurality of heat exchange components is provided along a flowing direction of the heat transport medium so as not to overlap at least partly as viewed in the flowing direction of the heat transport medium. 1. A heat exchanger comprising:a container to be fed with a heat transport medium; anda plurality of heat exchange components provided with a prescribed spacing inside the container,the plurality of heat exchange components being provided along a flowing direction of the heat transport medium so as not to overlap at least partly as viewed in the flowing direction of the heat transport medium.2. The heat exchanger according to claim 1 , wherein a gap between the heat exchange components provided on a front side in the flowing direction of the heat transport medium is obstructed by the heat exchange component provided on a back side in the flowing direction of the heat transport medium.3. The heat exchanger according to claim 1 , wherein the plurality of heat exchange components include a magnetocaloric effect material.4. The heat exchanger according to claim 3 , wherein one of the plurality of heat exchange components is formed from the magnetocaloric effect material different from that of another of the plurality of heat exchange components.5. The heat exchanger according to claim 3 , wherein the plurality of heat exchange components are divided into multiple areas between the upstream side and the downstream side in the heat exchanger and each area is formed from the magnetocaloric effect material different from each other.6. The heat exchanger according to claim 3 , wherein the magnetocaloric effect material includes at least one selected from the group consisting of Gd (gadolinium) claim 3 , a ...

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Номер записи: 28
12-09-2013 дата публикации

RARE-EARTH-FREE OR NOBLE METAL-FREE LARGE MAGNETIC COERCIVITY NANOSTRUCTURED FILMS

Номер: US20130236720A1
Автор: Bennett Steven, CARDINAL Thomas, HEIMAN Donald, Nummy Thomas
Принадлежит: NORTHEASTERN UNIVERSITY

Rare-earth-free, noble-metal-free nanostructured magnetic material thin films and methods of synthesis are described. Magnetocrystalline, ferrimagnetic thin films with islands of aligned single magnetic domains possess large coercivity. In particular, MnGa thin films are described. These materials provide a potential substitute to rare-earth-based and noble-metal-based magnets in applications related to electric motors and generators, audio headphones and speakers, recording media and magnetic hard drive memory. 1. A magnetic material comprising: the thin film comprises a plurality of single-magnetic-domain islands, and', 'the coercivity of the thin film is greater than that of epitaxially-deposited thin-film samples of rare-earth-free magnetic materials., 'a rare-earth free, noble-metal-free magnetocrystalline, ferromagnetic thin film disposed on a non-epitaxial substrate, wherein'}2. The material of claim 1 , wherein the thin film is a ferrimagnetic compound with tetragonal crystal symmetry.3. The material of claim 1 , wherein the thin film composition is MnY claim 1 , wherein Y is one or more of Al claim 1 , Ga claim 1 , Ti claim 1 , Fe claim 1 , Co claim 1 , Cr claim 1 , V and x is between 1 and 3.4. The material of claim 1 , wherein the coercivity is 2.5-5 T.5. The material of claim 1 , wherein the islands are nanoscale.6. The material of claim 1 , wherein the islands are magnetically isolated.7. The material of claim 1 , wherein the islands are 20-100 nm in diameter.8. The material of claim 1 , wherein the islands are 20-60 nm in diameter.9. The material of claim 1 , wherein the remnant magnetization of the material is greater than one-half of saturation magnetization.10. A magnetic material comprising: 'the thin film comprises a plurality of single-magnetic-domain islands and the magnetic domains are aligned with respect to each other.', 'a rare-earth free, noble-metal-free magnetocrystalline, ferromagnic thin film disposed on a non-epitaxial substrate, ...

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Номер записи: 29
19-09-2013 дата публикации

Permanent magnet, and motor and power generator using the same

Номер: US20130241681A1
Автор: Keiko Okamoto, Masaya Hagiwara, Shinya Sakurada, Tsuyoshi Kobayashi, Yosuke Horiuchi
Принадлежит: Toshiba Corp

In one embodiment, a permanent magnet includes a composition expressed by R p Fe q M r Cu s Co 100-p-q-r-s (R is a rare-earth element, M is at least one element selected from Zr, Ti, and Hf, 10≦p≦13.5 at %, 28≦q≦40 at %, 0.88≦r≦7.2 at %, and 3.5≦s≦13.5 at %), and a metallic structure including a cell phase having a Th 2 Zn 17 crystal phase, and a cell wall phase. A Fe concentration (C1) in the cell phase is in a range from 28 at % to 45 at %, and a difference (C1−C2) between the Fe concentration (C1) in the cell phase and a Fe concentration (C2) in the cell wall phase is larger than 10 at %.

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Номер записи: 30
19-09-2013 дата публикации

PERMANENT MAGNET, AND MOTOR AND POWER GENERATOR USING THE SAME

Номер: US20130241682A1
Автор: HAGIWARA Masaya, HORIUCHI Yosuke, Kobayashi Tsuyoshi, OKAMOTO Keiko, SAKURADA Shinya
Принадлежит: KABUSHIKI KAISHA TOSHIBA

In one embodiment, a permanent magnet includes: a composition expressed by RFeMCuCo(R is a rare-earth element, M is at least one element selected from Zr, Ti, and Hf, 10.8≦p≦13.5 at %, 28≦q≦40 at %, 0.88≦r≦7.2 at %, and 3.5≦s≦13.5 at %); and a metallic structure including a cell phase having a ThZncrystal phase, and a cell wall phase. A Cu concentration in the cell wall phase is in a range from 30 at % to 70 at %. 2. The permanent magnet according to claim 1 ,wherein the Cu concentration in the cell wall phase is in a range from 35 at % to 60 at %.3. The permanent magnet according to claim 1 ,wherein a full width at half maximum of a Cu concentration profile in the cell wall phase is 5 nm or less.5. The permanent magnet according to claim 1 , comprisinga sintered compact including the composition and the metallic structure,{'sup': 3', '3, 'wherein a density of the sintered compact is 8.2×10kg/mor more.'}6. The permanent magnet according to claim 1 ,wherein a coercive force of the permanent magnet is 800 kA/m or more, and residual magnetization of the permanent magnet is 1.15 T or more.7. The permanent magnet according to claim 1 ,wherein 50 at % or more of the element R is Sm, and 50 at % or more of the element M is Zr.8. The permanent magnet according to claim 1 ,wherein 20 at % or less of the Co is substituted for by at least one element A selected from Ni, V, Cr, Mn, Al, Ga, Nb, Ta, and W.9. A motor comprising the permanent magnet according to .10. A power generator comprising the permanent magnet according to . This application is based upon and claims the benefit of priority from Japanese Patent Application No. 2012-058867, filed on Mar. 15, 2012; the entire contents of which are incorporated herein by reference.Embodiments disclosed herein generally relate to a permanent magnet, and a motor and a power generator using the same.As a high-performance permanent magnet, there have been known rare-earth magnets such as a Sm—Co based magnet and a Nd—Fe—B based ...

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Номер записи: 31
19-09-2013 дата публикации

METHOD FOR CLASSIFYING ARTICLES AND METHOD FOR FABRICATING A MAGNETOCALORICALLY ACTIVE WORKING COMPONENT FOR MAGNETIC HEAT EXCHANGE

Номер: US20130243637A1
Автор: Katter Matthias
Принадлежит: Vacuumschmelze GmbH & Co. KG

A method for classifying articles comprising magnetocalorically active material according to magnetic transition temperature comprises providing a source of articles to be classified, the source comprising articles comprising magnetocalorically active materials having differing magnetic transition temperatures, sequentially applying a magnetic field at differing temperatures to the source, the magnetic field being sufficient to exert a magnetic force on the source that is greater than the inertia of a fraction of the articles causing the fraction of the articles to move and produce an article fraction, and collecting the article fraction at each temperature to provide a plurality of separate article fractions of differing magnetic transition temperature, thus classifying the articles comprising magnetocalorically active material according to magnetic transition temperature. 1. A method for classifying articles comprising magnetocalorically active material according to magnetic transition temperature , comprising:providing a source of articles to be classified, the source comprising articles comprising magnetocalorically active materials having differing magnetic transition temperatures;sequentially applying a magnetic field at differing temperatures to the source, the magnetic field being sufficient to exert a magnetic force on the source that is greater than the inertia of a fraction of the articles causing the fraction of the articles to move and thereby produce an article fraction for each temperature at which a magnetic field is applied, andcollecting the article fraction at each temperature at which a magnetic field is applied to provide a plurality of separate article fractions of differing magnetic transition temperature, thereby classifying the articles comprising magnetocalorically active material according to magnetic transition temperature.2. The method according to claim 1 , wherein the sequential applying a magnetic field at differing temperatures to ...

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Номер записи: 32
26-09-2013 дата публикации

MAGNETIC COOLING APPARATUS

Номер: US20130247588A1
Автор: CHOI Woo Hyek, Kim Min Soo, Kuk Keon, MUN Il Ju
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A magnetic cooling apparatus having an improved structure in which effective heat exchange may be performed by a heat transfer fluid is provided. The magnetic cooling apparatus includes at least one magnetic regenerator allowing a heat transfer fluid to pass therethrough and provided with a magnetocaloric material, a magnet to apply a magnetic field to the magnetic regenerator, and at least one high temperature heat exchanger allowing heat to be dissipated by the heat transfer fluid containing heat received from the magnetic regenerator. The magnetic cooling apparatus includes at least one low temperature heat exchanger allowing heat to be absorbed by the heat transfer fluid, a pipe to connect the magnetic regenerator, the high temperature heat exchanger and the low temperature heat exchanger such that the heat transfer fluid circulates through the magnetic regenerator, the high temperature heat exchanger and the low temperature heat exchanger, and a fluid transport unit to circulate or reciprocate the heat transfer fluid. 1. A magnetic cooling apparatus comprising:at least one magnetic regenerator allowing a heat transfer fluid to pass therethrough and provided with a magnetocaloric material;a magnet to apply a magnetic field to the magnetic regenerator;at least one high temperature heat exchanger allowing heat to be dissipated by the heat transfer fluid containing heat received from the magnetic regenerator subject to the magnetic field of the magnet applied thereto;at least one low temperature heat exchanger allowing heat to be absorbed by the heat transfer fluid that has transferred heat to the magnetic regenerator from which the magnetic field of the magnet has been removed;a pipe to connect the magnetic regenerator, the high temperature heat exchanger, and the low temperature heat exchanger such that the heat transfer fluid circulates through the magnetic regenerator, the high temperature heat exchanger, and the low temperature heat exchanger; anda fluid ...

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Номер записи: 33
03-10-2013 дата публикации

MAGNETIC REFRIGERATION DEVICE AND MAGNETIC REFRIGERATION SYSTEM

Номер: US20130255279A1
Автор: Hiraoka Toshiro, KAJI Shiori, KOBAYASHI Tadahiko, SAITO Akiko, SANADA Yasushi, TOMIMATSU Norihiro, YAGI Ryosuke
Принадлежит:

In a magnetic refrigeration device, magnetic bodies having a magnetocaloric effect and solid heat accumulation members having heat accumulation effect are arranged alternately with gaps therebetween. Magnetic field apply units start and stop application of magnetic fields to the magnetic bodies. A contact mechanism brings each of the magnetic bodies into contact with one of the solid heat accumulation members adjacent to the each magnetic body. Alternatively, the contact mechanism brings each of the solid heat accumulation members into contact with one of the magnetic bodies adjacent to the each solid heat accumulation members. 1. A magnetic refrigeration device comprising:a plurality of stationary members arranged in parallel with each other, with gaps defined between adjacent ones of the stationary members, each of the stationary members being formed of one of a magnetic body having a magnetocaloric effect, and a solid heat accumulation member having a heat accumulation effect, the adjacent ones of the stationary members opposing each other;a plurality of movable members arranged in parallel with each other, and permitted to be brought into contact with the adjacent stationary members within the respective gaps and thermally connected to the adjacent stationary members, each of the movable members being formed of the other of the magnetic body and the solid heat accumulation member;a magnetic field apply unit configured to start and stop application of a magnetic field to the magnetic body; anda moving mechanism configured to selectively bring the movable members to the corresponding stationary members in synchronism with the start and stop of the application of the magnetic field of the magnetic field apply unit.2. The device according to claim 1 , wherein the moving mechanism comprises a driving unit configured to drive the movable members using an external magnetic attraction force.3. The device according to claim 1 , wherein the moving mechanism comprises a ...

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Номер записи: 34
03-10-2013 дата публикации

BIO-CO-CR-MO ALLOY WITH ION ELUTION SUPPRESSED BY STRUCTURE CONTROL, AND PROCESS FOR PRODUCING SAME

Номер: US20130259735A1
Автор: CHIBA Akihiko, KUROSU Shingo, Nomura Naoyuki
Принадлежит:

This invention provides a technique for rendering bio-toxicity such as allergy toxicity derived from Ni trace impurity, i.e., nickel toxicity, which is unavoidably present in a bio-Co—Cr—Mo alloy or an Ni-free stainless steel alloy unharmful, characterized in that an element selected from the group consisting of the group 4, 5 and 13 elements of the periodic table, particularly an element selected from the group consisting of the group 4 elements of the periodic table, is added to the alloy composition. The additive element is preferably an element selected from the group consisting of zirconium and titanium, more preferably zirconium. 121-. (canceled)22. A bio-Co—Cr—Mo alloy , characterized in thatan alloy structure in the bio-Co—Cr—Mo alloy is enriched with an ε HCP phase structure; andion elution from the alloy is suppressed or reduced.23. The alloy according to claim 22 , characterized in that an element or compound selected from the group that includes elements in groups 4 claim 22 , 5 claim 22 , and 13 of the periodic table claim 22 , lanthanide elements claim 22 , misch metals claim 22 , and Mg is added to a bio-Co—Cr—Mo alloy composition.24. The alloy according to claim 22 , characterized in thata nickel content in the alloy composition is (1) about 1.0 wt % or less, (2) about 0.5 wt % or less, (3) about 0.002 wt % or less, (4) at least on the order of 100 ppm or less, or (5) on the order of several hundred parts per million or less; andthe alloy composition is an alloy in which Ni is unavoidably present.25. The alloy according to claim 22 , characterized in that a heat treatment at a temperature of 600° C. to 1250° C. is performed.26. The alloy according to claim 22 , characterized in that(i) an alloy composition is melted or heat treated at a temperature of 1000° C. or higher, and then rapidly cooled; or(ii) an alloy composition is heat treated for a long period of time at a temperature of approximately 1000° C. or lower and in a temperature range of at ...

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Номер записи: 35
10-10-2013 дата публикации

SYSTEM AND METHOD FOR USING A PHOTOVOLTAIC POWER SOURCE WITH A SECONDARY COOLANT REFRIGERATION SYSTEM

Номер: US20130263613A1
Автор: Bittner John D., Bittner John E.
Принадлежит:

A secondary coolant refrigeration system powered primarily by a photovoltaic source and by an alternating current (AC) source as a backup is disclosed. The secondary coolant refrigeration system has a pump for pumping secondary coolant fluid through a secondary coolant fluid loop. The system includes a variable frequency drive for controlling the speed of the pump. The variable frequency drive includes drive circuitry configured to provide variable frequency power to the pump via an output interface. The variable frequency drive also includes a first interface configured to receive power from the photovoltaic source and a second interface configured to receive power from the AC source. The circuit is further configured to cause the variable speed drive to be powered by the photovoltaic source when the power received from the first interface is adequate and by the AC source when the power received from the first interface is not adequate. 1. A refrigeration system powered primarily by a photovoltaic source and by an alternating current (AC) source as a backup , the refrigeration system having a primary loop and a secondary loop , the refrigeration system having a pump for pumping coolant fluid through the secondary loop , the system comprising: drive circuitry configured to provide variable frequency power to the pump via an output interface;', 'a first interface configured to receive power from the photovoltaic source;', 'a second interface configured to receive AC power from the AC source;', 'a DC bus coupled to the drive circuitry and configured to transmit power to the drive circuitry;', 'a rectifier coupled to the second interface and to the DC bus, wherein the rectifier is configured to receive the AC power from the AC source, convert the AC power into DC power, and transmit the DC power to the drive circuitry via the DC bus; and', 'a diode coupled to the first interface and to the DC bus, wherein the diode is configured to receive the power from the ...

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Номер записи: 36
10-10-2013 дата публикации

METHOD OF PREPARING TRANSITION METAL PNICTIDE MAGNETOCALORIC MATERIAL, TRANSITION METAL PNICTIDE MAGNETOCALORIC MATERIAL, AND DEVICE INCLUDING THE SAME

Номер: US20130264512A1
Автор: AHN Kyung-han, Kim Tae-Gon, KWON Soon-Jae
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A method of preparing a boron-doped transition metal pnictide magnetocaloric material, the method including: contacting a transition metal halide; a pnictogen element, a pnictogen oxide, or a combination thereof; a boron-containing oxide; and a reducing metal to provide a mixture; and heat treating the mixture to prepare the boron-doped transition metal pnictide magnetocaloric material. 1. A method of preparing a boron-doped transition metal pnictide magnetocaloric material , the method comprising: a transition metal halide;', 'a pnictogen element, a pnictogen oxide, or a combination thereof;', 'a boron-containing oxide; and', 'a reducing metal to provide a mixture; and, 'contacting'}heat-treating the mixture to prepare the boron-doped transition metal pnictide magnetocaloric material.2. The method of claim 1 , wherein the transition metal halide comprises a halide of Mn claim 1 , Fe claim 1 , Co claim 1 , Ni claim 1 , Cr claim 1 , V claim 1 , Cu claim 1 , Nb claim 1 , Y claim 1 , La claim 1 , Ce claim 1 , Pr claim 1 , Nd claim 1 , Pm claim 1 , Sm claim 1 , Eu claim 1 , Gd claim 1 , Tb claim 1 , Dy claim 1 , Ho claim 1 , Er claim 1 , Tm or Yb claim 1 , or a combination thereof.3. The method of claim 1 , wherein the transition metal halide comprises a transition metal fluoride claim 1 , a transition metal chloride claim 1 , a transition metal bromide claim 1 , a transition metal iodide claim 1 , or a combination thereof.4. The method of claim 3 , wherein the transition metal halide comprises MnF claim 3 , MnF claim 3 , MnCl claim 3 , MnCl claim 3 , MnBr claim 3 , MnI claim 3 , FeF claim 3 , FeF claim 3 , FeCl claim 3 , FeCl claim 3 , FeBr claim 3 , FeBr claim 3 , FeI claim 3 , FeI claim 3 , CoF claim 3 , CoF claim 3 , CoF claim 3 , CoCl claim 3 , CoCl claim 3 , CoBr claim 3 , CoI claim 3 , NiF claim 3 , NiCl claim 3 , NiI claim 3 , CrF claim 3 , CrF claim 3 , CrF claim 3 , CrF claim 3 , CrF claim 3 , CrCl claim 3 , CrCl claim 3 , CrCl claim 3 , CrBr claim 3 , CrBr ...

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Номер записи: 37
10-10-2013 дата публикации

ALLOY MATERIAL FOR R-T-B SYSTEM RARE EARTH PERMANENT MAGNET, METHOD FOR PRODUCING R-T-B SYSTEM RARE EARTH PERMANENT MAGNET, AND MOTOR

Номер: US20130264903A1
Автор: Nakajima Kenichiro, YAMAZAKI Takashi
Принадлежит: SHOWA DENKO K.K.

An alloy material for an R-T-B system rare earth permanent magnet having a high orientation rate and high coercivity (Hcj), and a method for producing an R-T-B system rare earth permanent magnet using the alloy material. The alloy material includes a plurality of R-T-B system alloys having different compositions and a metal powder. The respective R-T-B system alloys are formed of R which is composed of two or more kinds selected from rare earth elements, T which is composed of a transition metal essentially containing Fe, B, and unavoidable impurities. A first alloy having the greatest Dy content contains 17 mass % or greater of Dy, and a Dy concentration difference between the first alloy and a second alloy having the smallest Dy concentration difference with respect to the first alloy among the plurality of R-T-B system alloys is 5 mass % or greater. 1. An alloy material for an R-T-B system rare earth permanent magnet , comprising:a plurality of R-T-B system alloys having different compositions; anda metal powder,wherein the respective R-T-B system alloys are formed of R which is composed of two or more kinds selected from rare earth elements, T which is composed of a transition metal essentially containing Fe, B, and unavoidable impurities, a first alloy having the greatest Dy content among the plurality of R-T-B system alloys contains 17 mass % or greater of Dy, and a Dy concentration difference between the first alloy and a second alloy having the least Dy concentration difference with respect to the first alloy among the plurality of R-T-B system alloys is 5 mass % or greater.2. The alloy material for an R-T-B system rare earth permanent magnet according to claim 1 ,wherein the metal powder includes one or two or more selected from Al, Fe, Si, Ta, Ti, and Zr, or an alloy containing the metals.3. The alloy material for an R-T-B system rare earth permanent magnet according to claim 1 ,wherein the metal powder is included in an amount of 0.02 mass % to 6 mass %.4 ...

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Номер записи: 38
31-10-2013 дата публикации

MAGNETIC REFRIGERANT BED AND METHOD FOR MANUFACTURING THE SAME

Номер: US20130283822A1
Автор: Dai Wei, Gong Maoqiong, Shen Baogen, Shen Jun, Wu Jianfeng
Принадлежит:

The present invention provides a magnetic refrigerant bed, which is a column composed of n magnetic refrigerant bed components, and these n magnetic refrigerant bed components are arranged in a descending order according to Curie temperatures or phase transition temperatures of the magnetic refrigeration materials used, wherein n=1-1000. The magnetic refrigerant bed components are flat sheets (), straight wave-shaped sheets () or zigzag wave-shaped sheets () which can easily form a magnetic refrigerant bed with high specific surface area and flow channels of low resistance. And a method for manufacturing a magnetic refrigerant bed is also provided, which comprises the following steps: preparing magnetic refrigeration powder materials with Curie temperatures or phase transition temperatures in the operating temperature range of a magnetic refrigerator; and immersing the magnetic refrigeration powder materials into binder respectively; then loading the mixture into molds respectively and pressing the mixture into sheet magnetic refrigerant bed components; then arranging and assembling the obtained components in a descending order according to Curie temperatures or phase transition temperatures of the used magnetic refrigeration materials to obtain a columnar magnetic refrigerant bed. The magnetic refrigerant bed has advantages of large heat transfer specific surface area and small flow resistance of the refrigerant. 1. A magnetic refrigerant bed , which is a column composed of n magnetic refrigerant bed components , wherein n=1-1000 , the n magnetic refrigerant bed components are arranged in a descending order according to Curie temperatures or phase transition temperatures of magnetic refrigeration materials used;the magnetic refrigerant bed components are in the shape of a flat sheet, straight wave-shaped sheet or zigzag wave-shaped sheet, by which a magnetic refrigerant bed with high specific surface area and flow channels of low resistance can be easily formed, ...

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Номер записи: 39
31-10-2013 дата публикации

SINTERED FERRITE MAGNET AND ITS PRODUCTION METHOD

Номер: US20130285779A1
Автор: KAWATA Tsunehiro, KOBAYASHI Yoshinori
Принадлежит: HITACHI METALS, LTD.

A sintered ferrite magnet having a main phase composed of ferrite having a hexagonal, M-type magnetoplumbite structure, a grain boundary phase containing Si and Ca with a lower atomic ratio of La than in said main phase, and a third phase containing La at a higher atomic ratio than in said main phase, and a method for producing a sintered ferrite magnet having said third phase by calcining starting materials with more La than Ca, adding more than 1% and 1.8% or less by mass of SiOand 1-2% by mass (calculated as CaO) of CaCOto the calcined body, and pulverizing, molding and sintering it. 1. A sintered ferrite magnet having a main phase composed of ferrite having a hexagonal , M-type magnetoplumbite structure , a grain boundary phase containing Si and Ca with a lower atomic ratio of La than in said main phase , and a third phase containing La at a higher atomic ratio than in said main phase.2. The sintered ferrite magnet according to claim 1 , wherein said third phase is 0.5-5% by volume.3. The sintered ferrite magnet according to claim 2 , wherein said third phase is 1-3% by volume.4. The sintered ferrite magnet according to claim 1 , wherein said third phase contains La claim 1 , Ca claim 1 , Si and Fe in such proportions that La is 8-50 atomic % claim 1 , Ca is 20-45 atomic % claim 1 , Si is 20-45 atomic % claim 1 , and Fe is 4-20 atomic % claim 1 , based on the total amount (100 atomic %) of said elements.7. The method for producing a sintered ferrite magnet according to claim 6 , wherein the amount of said SiOadded is 1.1-1.6% by mass.8. The method for producing a sintered ferrite magnet according to claim 6 , wherein the amount of said CaCOadded is 1.2-2% by mass (calculated as CaO). The present invention relates to a sintered ferrite magnet and its production method.Sintered ferrite magnets are used in various applications such as motors, power generators, speakers, etc. Known as typical sintered ferrite magnets are Sr ferrite (SrFeO) and Ba ferrite (BaFeO) ...

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Номер записи: 40
07-11-2013 дата публикации

THERMOELECTRIC HEAT EXCHANGER COMPONENT INCLUDING PROTECTIVE HEAT SPREADING LID AND OPTIMAL THERMAL INTERFACE RESISTANCE

Номер: US20130291559A1
Автор: Edwards Jesse W., June M. Sean, Therrien Robert Joseph, Yadav Abhishek
Принадлежит: Phononic Devices, Inc.

Embodiments of a thermoelectric heat exchanger component having a heat spreading lid that optimizes thermal interface resistance between the heat spreading lid and multiple thermoelectric devices and methods of fabrication thereof are disclosed. In one embodiment, a thermoelectric heat exchanger component includes a circuit board and multiple thermoelectric devices attached to the circuit board. Heights of at least two of the thermoelectric devices are different due to, for example, tolerances in a manufacturing process for the thermoelectric devices. The thermoelectric heat exchanger component also includes a heat spreading lid over the thermoelectric devices and a thermal interface material between the thermoelectric devices and the heat spreading lid. An orientation (i.e., a tilt) of the heat spreading lid is such that a thickness of the thermal interface material, and thus a thermal interface resistance, is optimized for the thermoelectric devices. 1. A thermoelectric heat exchanger component , comprising:a circuit board;a plurality of thermoelectric devices attached to the circuit board, wherein two or more of the plurality of thermoelectric devices have different heights relative to the circuit board;a heat spreading lid over the plurality of thermoelectric devices; anda thermal interface material between the plurality of thermoelectric devices and the heat spreading lid;wherein an orientation of the heat spreading lid is such that a thickness of the thermal interface material is optimized for the plurality of thermoelectric devices.2. The thermoelectric heat exchanger component of wherein:the plurality of thermoelectric devices are attached to a first surface of the circuit board;the two or more of the plurality of thermoelectric devices have different heights relative to the first surface of the circuit board;the heat spreading lid is over first surfaces of the plurality of thermoelectric devices opposite the first surface of the circuit board; andthe ...

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Номер записи: 41
07-11-2013 дата публикации

Bonded magnet and motor provided with same

Номер: US20130293038A1
Автор: Shin&#39;ichi Tsutsumi
Принадлежит: Panasonic Corp

A bonded magnet of the present invention has a configuration that it contains at least a magnetic powder and a binder, and in which the magnetic powder and the binder are mixed such that a content of the magnetic powder is 98 mass % or more and a content of the binder is more than 0 mass % and 2 mass % or less. Accordingly, a bonded magnet having good magnetic characteristics and high heat resistance can be attained.

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Номер записи: 42
07-11-2013 дата публикации

R-t-b sintered magnet

Номер: US20130293328A1
Автор: Futoshi Kuniyoshi
Принадлежит: Hitachi Metals Ltd

This sintered R-T-B based rare-earth magnet includes: R 2 Fe 14 B type compound crystal grains, including a light rare-earth element RL (which includes at least one of Nd and Pr) as a major rare-earth element R, as main phases; and a heavy rare-earth element RH (which includes at least one of Dy and Tb). Before its surface region is removed, the sintered R-T-B based rare-earth magnet has no layer including the rare-earth element R at a high concentration in that surface region. The sintered R-T-B based rare-earth magnet has a portion in which coercivity decreases gradually from its surface region toward its core portion. The difference in the amount of TRE between a portion of the sintered R-T-B based rare-earth magnet that reaches a depth of 500 μm as measured from its surface region toward its core portion and the core portion of the sintered R-T-B based rare-earth magnet is 0.1 through 1.0.

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Номер записи: 43
14-11-2013 дата публикации

MAGNETIC REFRIGERATION SYSTEM AND VEHICLE AIR CONDITIONING DEVICE

Номер: US20130298571A1
Автор: Morimoto Tsuyoshi, NISHIZAWA Katzutoshi, Watanabe Naoki, Yatsuzuka Shinichi
Принадлежит: Denso Corporation

A magnetic refrigeration system constructed in such a way that a refrigerant transfer part transfers refrigerant from a first refrigerant discharge part of one refrigerant port to a first refrigerant circulation circuit after a magnetic field is applied to a magnetic working material by a magnetic field applying and removing part and that the refrigerant transfer part transfers refrigerant from a second refrigerant discharge part of other refrigerant port to a second refrigerant circulation circuit after the magnetic field is removed from the magnetic working material by the magnetic field applying and removing part. 1. A magnetic refrigeration system comprising:a cylindrical container having a plurality of working chambers formed therein radially in a circumferential direction, the plurality of working chambers having a magnetic working material having a magnetocaloric effect arranged therein and having refrigerant flowing therethrough, the cylindrical container having one and other refrigerant ports respectively on end faces in a longitudinal direction;a magnetic field applying and removing part which repeats applying and removing a magnetic field to and from the magnetic working material;a first refrigerant circulation circuit constructed in such a way that the refrigerant flowing out of a first refrigerant discharge part of the one refrigerant port flows through a first heat exchanger and returns to a first refrigerant suction part of the one refrigerant port;a second refrigerant circulation circuit constructed in such a way that the refrigerant flowing out of a second refrigerant discharge part of the other refrigerant port flows through a second heat exchanger and returns to a second refrigerant suction part of the other refrigerant port; anda refrigerant transfer part which transfers the refrigerant between the one refrigerant port and the other refrigerant port, whereinthe refrigerant transfer part is constructed in such a way as to transfer the refrigerant ...

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Номер записи: 44
14-11-2013 дата публикации

CO2FE-BASED HEUSLER ALLOY AND SPINTRONICS DEVICES USING THE SAME

Номер: US20130302649A1
Автор: Ammanabrolu Rajanikanth, Ananthakrishnan Srinivasan, Bollapragada Varaprasad, FURUBAYASHI Takao, Hayashi Masamitsu, Hirayama Shigeyuki, HONO Kazuhiro, Kasai Shinya, Mitani Seiji, Sinha Jaivardhan, TAKAHASHI Yukiko
Принадлежит:

[Problem to be Solved] 1. A CoFe-based Heusler alloy for use in a spintronics device , wherein the CoFe-based Heusler alloy has a component composition (0.25'}2. The CoFe-based Heusler alloy according to claim 1 , wherein the CoFe-based Heusler alloy has a spin polarization larger than 0.65.3. A CPP-GMR device using the CoFe-based Heusler alloy of as a ferromagnetic electrode claim 1 , wherein the CPP-GMR device has a thin-film layered structure of MgO substrate/Cr/Ag/CoFe-based Heusler alloy/Ag/CoFe-based Heusler alloy/Ag/Ru.4. An STO device using the CoFe-based Heusler alloy of as a ferromagnetic electrode claim 1 , wherein the STO device has a thin-film layered structure of MgO substrate/Cr/Ag/CoFe-based Heusler alloy/Ag/CoFe-based Heusler alloy/Ag/Ru.5. An NLSV device using the CoFe-based Heusler alloy of as a ferromagnetic electrode claim 1 , wherein the NLSV device has a structure made up of two ferromagnetic wires of MgO substrate/Cr/Ag/CoFe-based Heusler alloy and an Ag non-magnetic wire that bridges the two ferromagnetic wires. The present invention relates to a CoFe-based Heusler alloy with high spin polarization and a spintronics device using the same.Materials with a high spin polarization are required to achieve high performance spintronics devices, such as magnetic random access memory (MRAM), spin metal-oxide-semiconductor field effect transistor (spin MOSFET), tunnel magnetoresistance (TMR) used for a read head of a hard disk drive, giant magnetoresistance (GMR), spin torque oscillator (STO), and nonlocal spin valve (NLSV) which has been gained attention as a next generation read head. Co-based Heusler alloys are the candidates for highly spin polarized material, because some of the Co-based Heusler alloys are predicted to be a half-metal (half-metal: no density of states in one band at Fermi level, 100% spin polarization) and have a ...

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Номер записи: 45
21-11-2013 дата публикации

REFRIGERATING METHOD AND REFRIGERATING DEVICE WITH COMBINATOIN OF MAGNETIC REFRIGERATION AND REGENERATIVE GAS REFRIGERATION

Номер: US20130305742A1
Автор: Dai Wei, Gong Maoqiong, Shen Baogen, Shen Jun, Wu Jianfeng
Принадлежит:

The present invention provides a refrigeration method combining magnetic refrigeration and gas-based regenerative refrigeration, the method comprises: replacing part of or all of regenerators () in a gas-based regenerative refrigerator with magnetic regenerators (), wherein part of or all of fillers in the magnetic regenerators () are magnetic refrigeration materials to form magnetic regenerators () with the same operating temperature ranges as that of the corresponding regenerators in the gas-based regenerative refrigerator; disposing the magnetic regenerators () respectively in magnet assemblies () for generating controllable and periodically-changing field strength, and performing coupling control on working sequence of the gas-base regenerative regenerator and magnetic field changing sequence of the magnet assemblies to realize combination of magnetic refrigeration and gas-based regenerative refrigeration. And an apparatus combining magnetic refrigeration and gas-based regenerative refrigeration is also provided, which comprises: a pressure wave generator (), m regenerators (), m phase difference adjusting mechanism (), j magnet assemblies () for generating controllable and changeable field strength and a coupling control system (), wherein m is an integer between 1 and 5, and j<=m. 1. A refrigeration method combining magnetic refrigeration and gas-based regenerative refrigeration , comprising: replacing part of or all of regenerators in a gas-based regenerative refrigerator with magnetic regenerators , wherein part of or all of fillers in the magnetic regenerators are magnetic refrigeration materials to form magnetic regenerators with the same operating temperature ranges as that of the corresponding regenerators in the gas-based regenerative refrigerator; disposing the magnetic regenerators respectively in magnet assemblies for generating controllable and periodically-changing field strength , and performing coupling control on working sequence of the gas- ...

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Номер записи: 46
12-12-2013 дата публикации

MAGNETIC HEAT PUMP SYSTEM AND AIR-CONDITIONING SYSTEM USING THAT SYSTEM

Номер: US20130327062A1
Автор: Fuse Takuya, Morimoto Tsuyoshi, Nishizawa Kazutoshi, Watanabe Naoki, Yatsuzuka Shinichi
Принадлежит:

A magnetic heat pump system which arranges permanent magnets at the two sides of a magnetocalorific effect material to thereby strengthen the magnetic field to improve the cooling and heating ability, which magnetic heat pump system uses first and second magnets which move inside and outside of the containers in the state facing each other to change a magnitude of a magnetic field which is applied to a plurality of containers in which a magnetocalorific effect material is stored so as to change a temperature of a heat transport medium which is made to flow through the containers by a reciprocating pump, the intensity of the magnetic field which is applied to the magnetocalorific effect material in the containers being increased to enlarge the change of temperature of the heat transport medium which is discharged from the magnetic heat pump and improve the cooling and heating efficiency. 1. A magnetic heat pump system which comprisesmaterial containers inside of which a magnetocalorific effect material which has a magnetocalorific effect is arranged and inside of which a heat transport medium circulates,magnetic field changing means for changing a magnitude of a magnetic field which is applied to the magnetocalorific effect material,heat transport medium moving means for making the heat transport medium move back and forth between the two ends of the material containers,a heat absorbing means for making the heat transport medium which is discharged from one end sides of the material containers absorb heat of the outside, anda heat radiating means for radiating to the outside the heat which the heat transport medium which is discharged from the other end sides of the material containers has,the magnetic heat pump system characterized in thatthe magnetic field changing means are provided with first magnets and a yoke which are arranged at one sides of the material containers, second magnets and a yoke which are arranged at the other sides of the material containers so ...

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Номер записи: 47
19-12-2013 дата публикации

RARE EARTH MAGNET AND PROCESS FOR PRODUCING SAME

Номер: US20130335180A1
Автор: HIRAOKA Motoki, Kanada Keiu, Kaneko Yuji, Takada Yukio
Принадлежит:

A process for producing a rare earth magnet comprises: an adhesion step of causing a diffusion element capable of diffusing inwardly to adhere to the surface part of a magnet material comprising a compact or sintered body of rare earth alloy particles; and an evaporation step of heating the magnet material in vacuum to evaporate at least a portion of the diffusion element having been retained on or in the surface part of the magnet material. 110-. (canceled)11. A process for producing a rare earth magnet , the process comprising:an adhesion step of causing a diffusion element capable of diffusing inwardly to adhere to a surface part of a magnet material comprising a compact or sintered body of rare earth alloy particles; andan evaporation step of heating the magnet material in vacuum to evaporate at least a portion of the diffusion element having been retained on or in the surface part of the magnet material, whereinthe adhesion step is a vapor deposition step that causes heated magnet material and heated diffusion material including the diffusion element to come close to each other in vacuum and exposes the magnet material to a vapor of the diffusion element evaporated from the diffusion material thereby to vapor deposit the diffusion element on the surface of the magnet material, andthe evaporation step is a step that, subsequently to the vapor deposition step, heats the magnet material in vacuum without cooling the magnet material to room temperature region.12. The process for producing a rare earth magnet as set forth in claim 11 , wherein a heating temperature (Tm) of the magnetic material during the evaporation step is equivalent to a heating temperature (Tm) of the magnetic material during the vapor deposition step claim 11 , or intermediate between the heating temperature (Tm) of the magnetic material during the vapor deposition step and a heating temperature (Td) of the diffusion material during the vapor deposition step.13. The process for producing a rare ...

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Номер записи: 48
09-01-2014 дата публикации

REFRIGERATION THROUGH VOLTAGE-CONTROLLED ENTROPY CHANGE

Номер: US20140007592A1
Автор: Binek Christian
Принадлежит:

A method for refrigeration through voltage-controlled entropy change includes applying a voltage signal to a piezoelectric material to generate strain in the piezoelectric material, generating strain in a magnetic material attached to the piezoelectric material, and generating a change in a temperature of the magnetic material in response to the strain in the magnetic material. 1. A method comprising:applying a voltage signal to a piezoelectric material to generate strain in the piezoelectric material;generating strain in a magnetic material attached to the piezoelectric material; andgenerating a change in a temperature of the magnetic material in response to the strain in the magnetic material.2. The method of in which applying a voltage signal comprises applying an alternating voltage signal.3. The method of in which applying the alternating voltage signal comprises applying a first voltage to the piezoelectric material to induce a first strain to cause a reduction in the temperature of the magnetic material claim 2 , and applying a second voltage to the piezoelectric material to induce a second strain to cause an increase in the temperature of the magnetic material.4. The method of claim 3 , comprising using the magnetic material to absorb heat from a first object after the temperature of the magnetic material is reduced claim 3 , and transferring heat from the magnetic material to a second object after the temperature of the magnetic material is increased.5. The method of in which generating a change in the temperature comprise reducing the temperature of the magnetic material.6. The method of in which generating a strain in a magnetic material comprises generating a strain in a La—Sr—Mn—O compound.7. The method of in which the piezoelectric material has a grain structure claim 1 , the magnetic material has a grain structure claim 1 , and the piezoelectric material and the magnetic material are mixed and in contact with each other.8. The method of in which the ...

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Номер записи: 49
09-01-2014 дата публикации

MAGNETIC REFRIGERATION MATERIAL

Номер: US20140007593A1
Автор: Irie Toshio, Takata Hiroaki
Принадлежит: SANTOKU CORPORATION

Provided is a magnetic refrigeration material which has a Curie temperature near room temperature or higher, and provides refrigeration performance well over that of conventional materials when subjected to a field change up to 2 Tesla, which is assumed to be achievable with a permanent magnet. The magnetic refrigeration material is of a composition represented by the formula LaRE(FeSiCOXYZ)(RE: at least one of rare earth elements including Sc and Y and excluding La; X: Ga and/or Al; Y: at least one of Ge, Sn, B, and C; Z: at least one of Ti, V, Cr, Mn, Ni, Cu, Zn, and Zr; 0.03≦a≦0.17, 0.003≦b≦0.06, 0.02≦c≦0.10, 0≦d≦0.04, 0≦e≦0.04, 0≦f≦0.50), and has Tc of not lower than 220 K and not higher than 276 K, and the maximum (−ΔS) of magnetic entropy change (−ΔS) of the material when subjected to a field change up to 2 Tesla is not less than 5 J/kgK. 1. A magnetic refrigeration material of a composition represented by the formula LaRE(FeSiCoXYZ) , wherein RE stands for at least one element selected from the group consisting of rare earth elements including Sc and Y and excluding La , X stands for at least one of Ga and Al , Y stands for at least one element selected from the group consisting of Ge , Sn , B , and C , Z stands for at least one element selected from the group consisting of Ti , V , Cr , Mn , Ni , Cu , Zn , and Zr , a satisfies 0.03≦a≦0.17 , b satisfies 0.003≦b≦0.06 , c satisfies 0.02≦c≦0.10 , d satisfies 0≦d≦0.04 , e satisfies 0≦e≦0.04 , and f satisfies 0≦f≦0.50 , wherein said magnetic refrigeration material has a Curie temperature of not lower than 220 K and not higher than 276 K , and a maximum (−ΔS) of magnetic entropy change (−ΔS) of said material when subjected to a field change up to 2 Tesla is not less than 5 J/kgK.2. The magnetic refrigeration material according to claim 1 , wherein a full width at half maximum (K) of a curve of the magnetic entropy change (−ΔS) as a function of temperature under 0-2 Tesla is not less than 40 K.3. The magnetic ...

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Номер записи: 50
09-01-2014 дата публикации

PERMANENT MAGNET AND MANUFACTURING METHOD THEREFOR

Номер: US20140007980A1
Автор: KITAHARA Makoto
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

In permanent magnets formed by division, a cut-out part is provided in a straight line in the matrix of the permanent magnets, a metal having a higher coercive force than the permanent magnet matrix is diffused into the interior of the matrix from a surface that includes the surface of the cut-out part of the permanent magnet matrix, and the permanent magnet matrix is divided into multiple permanent magnet parts along the straight cut-out part to form the permanent magnets. An Nd—Fe—B sintered magnet may be used as the permanent magnet matrix, and, dysprosium (Dy) may be used as the metal having a higher coercive force. Multiple indentations disposed in a straight line may be used as the cut-out parts, or a straight groove may also be used. 2. The permanent magnet according to claim 1 , wherein the cut-out part consists of multiple indentations disposed in a straight line.3. The permanent magnet according to claim 1 , wherein the cut-out part is a straight groove.4. The permanent magnet according to claim 1 , wherein the matrix of the permanent magnet is divided into two permanent magnets claim 1 , and the two permanent magnets are a pair of permanent magnets forming one of multiple field systems of a rotating electrical machine.5. The permanent magnet according to claim 1 , wherein cut-out depth of the cut-out part is equal to or greater than the {(width (W) of the division direction in the matrix/2−(diffusion depth of metal having higher coercive force)}.6. A permanent magnet provided with a division surface where a metal having a higher coercive force than the matrix of the permanent magnet is diffused from the surface into the interior of the permanent magnet.7. A method of manufacturing a permanent magnet claim 1 , the method comprising:providing a cut-out part in a straight line in the matrix of the permanent magnet;diffusing a metal having a higher coercive force than the matrix into the interior of the matrix from a surface that includes the surface of the ...

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Номер записи: 51
23-01-2014 дата публикации

MAGNETIC COMPOSITE AND METHOD OF MANUFACTURING THE SAME, AND ARTICLE AND DEVICE INCLUDING THE SAME

Номер: US20140023821A1
Автор: KIM In-Gyu, Kim Se-Yun, KWON Soon-Jae, LEE Eun-sung
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A magnetic composite including a magnetic material; and a binder including a metallic glass, a glass frit, or a combination thereof. 1. A magnetic composite comprising:a magnetic material; anda binder including a metallic glass, a glass frit, or a combination thereof.2. The magnetic composite of claim 1 , wherein the magnetic material comprises a magnetocaloric material claim 1 , a soft magnetic material claim 1 , a hard magnetic material claim 1 , or a combination thereof.3. The magnetic composite of claim 2 , wherein the magnetic material comprises a metal claim 2 , a semi-metal claim 2 , an alloy thereof claim 2 , an oxide thereof claim 2 , or a combination thereof.4. The magnetic composite of claim 3 , wherein the magnetic material comprises iron claim 3 , manganese claim 3 , cobalt claim 3 , nickel claim 3 , niobium claim 3 , yttrium claim 3 , lanthanum claim 3 , cerium claim 3 , praseodymium claim 3 , neodymium claim 3 , promethium claim 3 , samarium claim 3 , europium claim 3 , gadolinium claim 3 , terbium claim 3 , dysprosium claim 3 , holmium claim 3 , erbium claim 3 , thulium claim 3 , ytterbium claim 3 , boron claim 3 , silicon claim 3 , germanium claim 3 , gallium claim 3 , arsenic claim 3 , antimony claim 3 , tellurium claim 3 , phosphorus claim 3 , arsenic claim 3 , antimony claim 3 , bismuth claim 3 , an alloy thereof claim 3 , an oxide thereof claim 3 , a nitride thereof claim 3 , or a combination thereof.5. The magnetic composite of claim 1 , wherein the magnetic material is in the form of a particle.6. The magnetic composite of claim 5 , wherein the magnetic material has a particle diameter of about 1 nanometer to about 100 micrometers.7. The magnetic composite of claim 1 , wherein the binder has a glass transition temperature of about 50° C. to about 800° C.8. The magnetic composite of claim 1 , wherein the binder has a supercooled liquid region of about 1 K to about 200 K.9. The magnetic composite of claim 1 , wherein the metallic glass is an ...

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Номер записи: 52
06-03-2014 дата публикации

NdFeB SYSTEM SINTERED MAGNET

Номер: US20140062632A1
Автор: Mizoguchi Tetsuhiko, SAGAWA Masato
Принадлежит:

A NdFeB system sintered magnet produced by the grain boundary diffusion method that has a high coercive force and squareness ratio with only a small decrease in the maximum energy product. The NdFeB system sintered magnet has a base material produced by orienting powder of a NdFeB system alloy and sintering the powder, with Dy and/or Tb (the “Dy and/or Tb” is hereinafter called R) attached to and diffused from a surface of the base material through the grain boundary inside the base material by a grain boundary diffusion treatment, wherein the difference C-Cbetween the Rcontent C(wt %) in the grain boundary reaching the surface to which Ris attached and the Rcontent C(wt %) in the grain boundary at a depth of 3 mm from the aforementioned attachment surface is equal to or smaller than 20 wt %. 1. A NdFeB system sintered magnet having a base material produced by orienting powder of a NdFeB system alloy and sintering the powder , with Dy and/or Tb (R) attached to and diffused from a surface of the base material through a grain boundary inside the base material by a grain boundary diffusion treatment ,{'sub': s', 'd3', 'H', 's', 'H', 'H', 'd3, 'wherein a difference C-Cbetween an Rcontent C(wt %) in the grain boundary reaching the surface to which Ris attached and an Rcontent C(wt %) in the grain boundary at a depth of 3 mm from the aforementioned attachment surface is equal to or smaller than 20 wt %.'}2. The NdFeB system sintered magnet according to claim 1 , wherein a difference C-Cbetween the Rcontent C(wt %) in the grain boundary reaching the attachment surface and an Rcontent C(wt %) in the grain boundary at a depth of 1 mm from the attachment surface is equal to or smaller than 15 wt %.3. The NdFeB system sintered magnet according to claim 1 , wherein a percentage of a total volume of a carbon rich phase in a rare-earth rich phase at the grain-boundary triple points in the base material to a total volume of the rare-earth rich phase is equal to or lower than 50%.4 ...

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Номер записи: 53
20-03-2014 дата публикации

MAGNETIC REFRIGERATOR

Номер: US20140075958A1
Автор: TAKAHASHI Hidekazu, Tasaki Yutaka
Принадлежит: NISSAN MOTOR CO., LTD.

A magnetic body is provided to improve heat transport capability and heat transport efficiency. A magnetic body arranged plate has magnetic body units each including magnetic members. Low-temperature side and high-temperature side heat exchange units are disposed at ends of each magnetic body unit. Permanent magnets and heat conductive members are arranged on a magnet/heat conductive member arranged plate. When the magnetic body arranged plate and the magnet/heat conductive member arranged plate are moved relative to each other, the permanent magnets apply magnetism separately to the magnetic members of each magnetic body unit. The magnet/heat conductive member arranged plate creates a temperature difference and conducts heat in one direction between the magnetic members, the low-temperature side heat exchange unit, and the high-temperature side heat exchange unit. 1. A magnetic refrigerator comprising:a magnetic body arranged plate on which a plurality of magnetic body units are disposed, each magnetic body unit having magnetic members of a same material arranged side by side, the plurality of magnetic body units disposed side by side in a direction perpendicular to an arrangement direction of the magnetic members;a low-temperature side heat exchange unit adjacent to and spaced with a gap from a first end magnetic member positioned on one end of each magnetic body unit;a high-temperature side heat exchange unit adjacent to and spaced with a gap from a second end magnetic member positioned on another end of each magnetic body unit;a magnet/heat conductive member arranged plate on which magnetism applying units and heat conductive members are provided, the magnetism applying unit configured to apply magnetism separately to the magnetic members of each magnetic body unit disposed on the magnetic body arranged plate and the heat conductive members configured to conduct heat generated in each magnetic body unit from the low-temperature side heat exchange unit to the ...

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Номер записи: 54
20-03-2014 дата публикации

COIL COMPONENT AND MAGNETIC METAL POWDER CONTAINING RESIN USED THEREFOR

Номер: US20140077914A1
Автор: ITO Tomokazu, Itoh Hideto, KANAME Yuuya, Kawahara Takahiro, MAEDA Yoshihiro, MORITA Makoto, OHKUBO Hitoshi, OHTA Manabu, TONOYAMA Kyohei
Принадлежит: TDK Corporation

A coil component is provided with coil conductors and and a magnetic metal powder containing resin (and ) covering the coil conductors and . The magnetic metal powder containing resin includes first metal powder having a first average grain diameter, second metal powder having a second average grain diameter that is smaller than the first average grain diameter, and third metal powder having a third average grain diameter that is smaller than the second average grain diameter. The first average grain diameter is 15 μm or more and 100 μm or less. The third average grain diameter is 2 μm or less. The first metal powder mainly contains Permalloy and the second and third metal powders mainly contain carbonyl iron. 1. A coil component comprising:a coil conductor; anda magnetic metal powder containing resin covering the coil conductor, whereinthe magnetic metal powder containing resin includes first metal powder having a first average grain diameter, second metal powder having a second average grain diameter that is smaller than the first average grain diameter, and third metal powder having a third average grain diameter that is smaller than the second average grain diameter,the first average grain diameter is 15 μm or more and 100 μm or less, andthe third average grain diameter is 2 μm or less.2. The coil component as claimed in claim 1 , wherein magnetic permeability of the first metal powder is higher than that of the second and third metal powders.3. The coil component as claimed in claim 2 , wherein the first metal powder mainly contains Permalloy claim 2 , and the second and third metal powders mainly contain iron.4. The coil component as claimed in claim 1 , wherein the second average grain diameter is 3 μm or more and 10 μm or less.5. The coil component as claimed in claim 4 , whereinthe second average grain diameter is 3 μm or more and 5 μm or less, andthe third average grain diameter is 1 μm or less.6. The coil component as claimed in claim 1 , wherein a weight ...

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Номер записи: 55
27-03-2014 дата публикации

Synthesis of Magnetic Composites

Номер: US20140085022A1
Автор: Eisele Ulrich, Gaenzle Jochen, Kleinehakenkamp Katharina, Riessen Jutta, Wilde Alexandra
Принадлежит: ROBERT BOSCH GMBH

The present disclosure relates to a method for producing magnetic composites, comprising the electrophoretic deposition of hard-magnetic particles and soft-magnetic particles from a suspension onto an electrode, as well as the composite produced by means of the method and the use thereof for producing permanent magnets. 1. A process for producing magnetic composites , comprising:electrophoretically depositing hard-magnetic particles and soft-magnetic particles on an electrode.2. The process as claimed in claim 1 , wherein the hard-magnetic particles and the soft-magnetic particles are nanosize particles.3. The process as claimed in claim 1 , wherein at least one of the hard-magnetic particles and the soft-magnetic particles is selected from the group consisting of metallic materials claim 1 , intermetallic compounds and oxidic materials.4. The process as claimed in claim 1 , wherein at least one of the hard-magnetic particles and the soft-magnetic particles displays anisotropy.5. The process as claimed in claim 1 , wherein materials for the soft-magnetic particles are selected from the group consisting of iron claim 1 , alloys based on iron claim 1 , nickel and cobalt claim 1 , soft ferrites claim 1 , NiZn claim 1 , and MnZn.6. The process as claimed in claim 1 , wherein materials for the hard-magnetic particles are selected from the group consisting of cobalt-samarium (SmCo claim 1 , SmCo) claim 1 , Sm(Co claim 1 , Cu claim 1 , Fe claim 1 , Zr)) claim 1 , neodymium-iron-boron (NdFeB) claim 1 , AlNiCo alloys claim 1 , hard ferrites based on barium claim 1 , hard ferrites based on strontium claim 1 , PtCo alloys claim 1 , CuNiFe alloys claim 1 , CuNiCo alloys claim 1 , FeCoCr alloys claim 1 , martensitic steels and MnAlC alloys.7. The process as claimed in claim 2 , wherein a size of the nanosize particles is from 1 to 100 nm.8. The process as claimed in claim 1 , wherein the hard-magnetic particles and the soft-magnetic particles are deposited from a suspension ...

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Номер записи: 56
02-01-2020 дата публикации

METHOD FOR PREPARING NEODYMIUM-IRON-BORON PERMANENT MAGNETIC MATERIAL

Номер: US20200001360A1
Автор: Bai Yang, Chen Peixin, Cheng Yu, Li Hui, Li Jingya, LIU Jixiang, Liu Shufeng, Liu Xiaoyu, Lou Shupu, Lu Fei, Sun Caina, Sun Liangcheng, Wang Feng, Wang Yu, Xia Feng, YANG Fan, Yang Zhanfeng, ZHANG ZHIHONG, Zheng Tiancang
Принадлежит:

A method for preparing a NdFeB permanent magnetic material may include providing a covered NdFeB magnetic powder by depositing heavy rare earth particles or high-melting particles onto a NdFeB magnetic powder by physical vapor deposition; and performing orientation molding and sintering on the covered NdFeB magnetic powder to provide the NdFeB permanent magnetic material. 110.-. (canceled)11. A method for preparing a NdFeB permanent magnetic material , the method comprising:preparing a NdFeB magnetic material;depositing heavy rare earth particles or high-melting particles onto the NdFeB magnetic material by physical vapor deposition to provide a covered NdFeB magnetic material; andperforming orientation molding and sintering on the covered NdFeB magnetic material to provide the NdFeB permanent magnetic material.12. The method according to claim 11 , further comprising first preparing the NdFeB magnetic material as a coarse powder with a particle size of 10 μm-2 mm claim 11 , andsubsequently refining the coarse powder into a fine powder after the physical vapor deposition.13. The method according to claim 11 , wherein the NdFeB magnetic material is prepared from a NdFeB magnet.14. The method according to claim 11 , wherein the preparation of the NdFeB magnetic material comprises mixing ingredients claim 11 , and smelting and strip casting the resulting mixture to obtain NdFeB sheets claim 11 , and wherein the depositing step comprises depositing heavy rare earth particles or high-melting particles onto the NdFeB sheets in an inert atmosphere by the physical vapor deposition method to form a covered NdFeB sheet claim 11 , the method further comprising crushing and milling the covered NdFeB sheet into a powder.15. The method according to claim 11 , wherein the depositing step further comprises selecting a desired high-melting target material claim 11 , placing the NdFeB magnetic material and particles of the high-melting target material in a physical vapor deposition ...

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Номер записи: 57
06-01-2022 дата публикации

Method for preparing high-performance sintered NdFeB magnets and sintered NdFeB magnets

Номер: US20220005637A1
Автор: CHEN Xiulei, DING Kaihong, DONG Zhanji, PENG Zhongjie
Принадлежит:

The present disclosure relates to a method for preparing high-performance sintered NdFeB magnets. The method comprises the steps of: a) attaching a multi-element alloy powder onto a surface of the sintered NdFeB magnet, wherein the multi-element alloy is of formula (1) PrRHGaCu() with RH being at least one element selected from Dy and Tb and a, b, c, and d satisfying the conditions 0.30≤(a+b)/(a+b+c+d)≤0.65, 0.20≤d/(c+d)≤0.50, and 0.23≤b/(a+b)≤0.60; and b) performing a diffusion process. 1. A method for preparing high-performance sintered NdFeB magnets comprising the steps of: {'br': None, 'sub': a', 'b', 'c', 'd, 'PrRHGaCu\u2003\u2003(1)'}, 'a) attaching a multi-element alloy powder onto a surface of the sintered NdFeB magnet, wherein the multi-element alloy is of formula (1)'}with RH being at least one element selected from Dy and Tb anda, b, c, and d satisfying the conditions 0.30≤(a+b)/(a+b+c+d)≤0.65, 0.20≤d/(c+d)≤0.50, and 0.23≤b/(a+b)≤0.60; andb) performing a diffusion process.2. The method of claim 1 , wherein in the diffusion process of step b) a diffusion temperature is in the range of 720° C. to 980° C. for a period of 5 to 25 hours.3. The method of claim 1 , wherein step b) is followed by step c) of performing an aging process.4. The method of claim 2 , wherein step b) is followed by step c) of performing an aging process.5. The method of claim 3 , wherein in the aging process of step c) an aging temperature is in the range of 480° C. to 680° C. for a period of 1 to 10 hours.6. The method of claim 4 , wherein in the aging process of step c) an aging temperature is in the range of 480° C. to 680° C. for a period of 1 to 10 hours.7. The method of claim 1 , wherein an average particle size of the multi-element alloy powder is in the range of 10 μm to 1000 μm.8. The method of claim 7 , wherein the average particle size of the powder is 50 μm to 600 μm.9. The method of claim 2 , wherein an average particle size of the multi-element alloy powder is in the range ...

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Номер записи: 58
02-01-2020 дата публикации

Magnetic Heat Pump Apparatus

Номер: US20200003461A1
Автор: BAE Sangchul
Принадлежит:

Provided is a magnetic heat pump apparatus which solves a problem caused by the use of a rotary valve and which has improved efficiency. The magnetic heat pump apparatus includes magnetic working bodies A and B, which are provided with magnetic working substances having a magnetocaloric effect and in which a heat transfer medium is circulated, permanent magnets which change the size of a magnetic field to be applied to the magnetic working substances, displacers which cause the heat transfer medium to reciprocate between a high-temperature end and a low-temperature end of each of the magnetic working bodies, and external heat transfer medium circulation circuits and which have external heat exchangers and and which circulate a second heat transfer medium. The external heat transfer medium circulation circuits cause heat exchange to be carried out between the second heat transfer medium and the heat transfer medium of each of the magnetic working bodies, and then circulate the second heat transfer medium which has been subjected to the heat exchange to external heat exchangers. 1. A magnetic heat pump apparatus comprising:a magnetic working body which includes a magnetic working substance having a magnetocaloric effect and in which a heat transfer medium is circulated;a magnetic field changing device which changes the size of a magnetic field to be applied to the magnetic working substance;a displacer which reciprocates the heat transfer medium between a high-temperature end and a low-temperature end of the magnetic working body; andan external heat transfer medium circulation circuit which has an external heat exchanger and which circulates a second heat transfer medium,wherein the external heat transfer medium circulation circuit causes the second heat transfer medium and the heat transfer medium of the magnetic working body to carry out heat exchange, and circulates the second heat transfer medium that has been subjected to the heat exchange to the external heat ...

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Номер записи: 59
03-01-2019 дата публикации

ELECTROCALORIC HEAT TRANSFER MODULAR STACK

Номер: US20190003747A1
Автор: Annapragada Subramanyaravi, Eastman Scott Alan, Mantese Joseph V., Perry Michael L., Rheaume Jonathan, Verma Parmesh, Walker Craig R.
Принадлежит: UNITED TECHNOLOGIES CORPORATION

A heat transfer system is disclosed including a plurality of modules arranged in a stack. The stack modules include electrocaloric element and electrodes on each side of the film. A fluid flow path is disposed between two or more electrocaloric elements. A first electrical bus element () in electrical contact with the first electrode (), and a second electrical bus element () in electrical contact with second electrode (). The first electrical bus element is electrically connected to at least one other electrical bus of another electrocaloric element in the stack at the same polarity as said first electrical bus, or the second electrical bus element is electrically connected to at least one other electrical bus of another electrocaloric element in the stack at the same polarity as said second electrical bus. 1. A heat transfer system , comprising a plurality of modules arranged in a stack , each of the modules comprisingan electrocaloric element comprising an electrocaloric film, a first electrode on a first side of the electrocaloric film, and a second electrode on a second side of the electrocaloric film;a fluid flow path between two or more electrocaloric elements;a first electrical bus element in electrical contact with the first electrode; anda second electrical bus element in electrical contact with second electrode;wherein the first electrical bus element is electrically connected to at least one other electrical bus of another electrocaloric element in the stack at the same polarity as said first electrical bus, or the second electrical bus element is electrically connected to at least one other electrical bus of another electrocaloric element in the stack at the same polarity as said second electrical bus.2. The heat transfer system of claim 1 , wherein the first electrical bus element is electrically connected to at least one other electrical bus of another electrocaloric element in the stack at the same polarity as said first electrical bus claim 1 , and ...

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Номер записи: 60
03-01-2019 дата публикации

ELECTROCALORIC HEAT TRANSFER SYSTEM

Номер: US20190003748A1
Автор: Annapragada Subramanyaravi, Gorbounov Mikhail B., Herring Neal R., Jonsson Ulf J., Kuczek Andrzej E., Lynch Matthew E., Radcliff Thomas D., Smeltz Andrew, Verma Parmesh
Принадлежит:

A heat transfer system is disclosed that includes a plurality of electrocaloric elements () including an electrocaloric film (), a first electrode () on a first side of the electrocaloric film, and a second electrode () on a second side of the electrocaloric film. A fluid flow path () is disposed along the plurality of electrocaloric elements, formed by corrugated fluid flow guide elements (). 1. A heat transfer system , comprisinga plurality of electrocaloric elements comprising an electrocaloric film, a first electrode on a first side of the electrocaloric film, and a second electrode on a second side of the electrocaloric film; anda fluid flow path along the plurality of electrocaloric elements, formed by corrugated fluid flow guide elements.2. The heat transfer system of claim 1 , wherein the corrugated fluid flow guide elements comprise electrically non-conductive corrugated spacer elements disposed between adjacent electrocaloric elements.3. The heat transfer system of claim 1 , wherein the corrugated fluid flow guide elements comprise electrically conductive corrugated spacers disposed between adjacent electrocaloric elements.4. The heat transfer system of claim 3 , wherein the electrically conductive corrugated spacers comprise shaped electrically conductive structures in electrical contact with electrodes on adjacent electrocaloric elements.5. The heat transfer system of claim 3 , wherein the electrically conductive corrugated spacers comprise an extension of conductive material electrodes on adjacent electrocaloric elements in a direction normal to a surface of the electrocaloric polymer film.6. The heat transfer system of claim 5 , wherein the electrically conductive corrugated spacers are configured as a microchannel structure or an open-cell foam.7. The heat transfer system of claim 3 , wherein the electrically conductive corrugated spacers comprise carbon nanotubes.8. The heat transfer system of claim 1 , wherein the fluid flow guide elements comprise ...

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Номер записи: 61
07-01-2016 дата публикации

Process for Treating a Magnetic Structure

Номер: US20160005537A1
Автор: Ravelosona Dafine
Принадлежит:

Process for treating a magnetic structure, wherein it comprises the following steps: providing a magnetic structure comprising one first layer of magnetic material comprising a CoFeB alloy; irradiating the magnetic structure with light low-energy ions; and simultaneously holding the magnetic structure with a preset temperature profile and for a preset time. 1. A process for treating a magnetic structure , wherein it comprises the following steps:providing a magnetic structure comprising at least one first layer of magnetic material comprising a CoFeB alloy;irradiating the magnetic structure with low-energy light ions; andsimultaneously holding the magnetic structure at a preset temperature profile and for a preset time.2. The process according to claim 1 , wherein the preset temperature is less than or equal to 200° C.3. The process according to claim 1 , wherein the preset temperature is between 20° C. and 200° C.4. The process according to claim 1 , wherein the preset temperature is between 15° C. and 40° C.5. The process according to claim 1 , wherein the preset time is less than or equal to 1 hour.6. The process according to claim 1 , wherein the magnetic material is initially amorphous.7. The process according to claim 1 , wherein the magnetic material is initially crystalline.8. The process according to claim 1 , wherein the ions are He+ claim 1 , H+ claim 1 , Ar+ claim 1 , Xe+ claim 1 , or Ga+ ions.9. The process according to claim 1 , wherein the ions have an energy of between 0.1 keV and 150 keV.10. The process according to claim 1 , wherein claim 1 , during the irradiation step claim 1 , the ions are emitted at a dose of between 1*1013 ions/cm2 and 5*1016 ions/cm2.11. The process according to claims 1 , wherein claims 1 , during the irradiation step claims 1 , the ions pass through at least the first layer of magnetic material.12. The process according to claim 1 , wherein claim 1 , during the irradiation step claim 1 , the ions bombard the magnetic ...

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Номер записи: 62
04-01-2018 дата публикации

MAGNETOCALORIC CASCADE AND METHOD FOR FABRICATING A MAGNETOCALORIC CASCADE

Номер: US20180005735A1
Автор: JACOBS Steven Alan, SCHARF Florian, SCHWIND Markus, VAN ASTEN David
Принадлежит: BASF SE

A magnetocaloric cascade contains a sequence of magnetocaloric material layers having different Curie temperatures T, wherein the magnetocaloric material layers include a cold-side outer layer, a hot-side outer layer and at least three inner layers between the cold-side outer layer and the hot-side outer layer, and each pair of next neighboring magnetocaloric layers of the magnetocaloric cascade has a respective Curie-temperature difference amount ΔTbetween their respective Curie temperatures, wherein the hot-side outer layer or the cold-side outer layer or both the hot-side and cold-side outer layer exhibits a larger ratio mΔS/ΔTin comparison with any of the inner layers, m denoting the mass of the respective magnetocaloric material layer and ΔSdenoting a maximum amount of isothermal magnetic entropy change achievable in a magnetic phase transition of the respective magnetocaloric material layer. 1. A magnetocaloric cascade , comprising:{'sub': 'C', 'claim-text': [{'sub': 'C', 'the magnetocaloric material layers include a cold-side outer layer, a hot-side outer layer and at least three inner layers between the cold-side outer layer and the hot-side outer layer, and each pair of next neighboring magnetocaloric layers of the magnetocaloric cascade has a respective Curie-temperature difference amount ΔTbetween their respective Curie temperatures, wherein'}, {'sub': max', 'C', 'max, 'the hot-side outer layer or the cold-side outer layer or both the hot-side and cold-side outer layer exhibits a larger ratio mΔS/ΔTin comparison with any of the inner layers, m denoting the mass of the respective magnetocaloric material layer and ΔSdenoting a maximum amount of isothermal magnetic entropy change achievable in a magnetic phase transition of the respective magnetocaloric material layer.'}], 'a sequence of magnetocaloric material layers having different Curie temperatures T, wherein'}2. The magnetocaloric cascade of claim 1 , wherein the hot-side outer layer or the cold-side ...

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Номер записи: 63
02-01-2020 дата публикации

RARE-EARTH SINTERED MAGNET

Номер: US20200005973A1
Автор: Hashimoto Ryuji, Ito Masashi, IWASA Takurou
Принадлежит: TDK Corporation

A rare-earth sintered magnet contains main phase crystal grains having an Nd5Fe17-type crystal structure, includes R and T (where R represents one or more rare-earth elements that essentially include Sm and T represents Fe or one or more transition metal elements that essentially include Fe and Co), and wherein the compositional ratio of R is 20-40 at % and the remaining portion is substantially T; the remaining portion other than R is substantially only T or only T and C; and when the main phase crystal grains' average grain size in one cross-sectional surface of the rare-earth sintered magnet is defined as Dv, while grain size of individual main phase crystal grains is defined as Di, Dv is at least 1.0 μm, and the main phase crystal grains' area ratio that satisfy 0.7Dv≤Di≤2.0Dv is at least 80% with respect to the area of a cross-sectional surface of the rare-earth sintered magnet. 1. A rare-earth sintered magnet comprising main phase crystal grains having NdFetype crystal structure , wherein the rare-earth sintered magnet comprises R and T (R is essentially Sm or is at least one selected from rare earth elements in addition to Sm; and T is essentially Fe or a combination of Fe and Co or is at least one selected from transition metal elements in addition to Fe or the combination of Fe and Co) ,a compositional ratio of R in the rare-earth sintered magnet is 20 at % or more and 40 at % or less,a remaining part besides R in the rare-earth sintered magnet is substantially T only or a combination of T and C only, andDv is 1.0 μm or more and an area ratio of the main phase crystal grains satisfying 0.7Dv≤Di≤2.0Dv is 80% or more in a cross section of the rare-earth sintered magnet in which Dv represents an average grain size of the main phase crystal grains and Di represents a grain size of individual main phase crystal grains at the cross section of the rare-earth sintered magnet.2. The rare-earth sintered magnet according to further including C claim 1 , and C content ...

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Номер записи: 64
02-01-2020 дата публикации

HIGH-TEMPERATURE-STABILITY PERMANENT MAGNET MATERIAL AND APPLICATION THEREOF

Номер: US20200005974A1
Автор: Li Dong, LIU Lei, Liu Zhuang, SUN Yingli, YAN Aru, Zhang Xin
Принадлежит:

The present disclosure discloses a high-temperature-stability permanent magnet material and an application thereof. The microstructure of the permanent magnet material comprises a first magnetic phase and a second magnetic phase; the first magnetic phase is a magnetic phase with uniaxial anisotropy, and the second magnetic phase is a magnetic phase with spin reorientation transition; and the first magnetic phase and the second magnetic phase are isolated from each other; and the absolute value of the temperature coefficient of saturation magnetization intensity of the first magnetic phase is less than 0.02%/° C. By means of the permanent magnet material comprising the first magnetic phase and the second magnetic phase, a positive temperature coefficient of coercivity can be obtained, so that obtaining a low temperature coefficient of coercivity can be targeted, regular and universal. 1. A high-temperature-stability permanent magnet material , comprising a permanent magnet having a microstructure , wherein the microstructure comprises: a first magnetic phase and a second magnetic phase; the first magnetic phase is a magnetic phase with uniaxial anisotropy , and the second magnetic phase is a magnetic phase with spin reorientation transition; the first magnetic phase and the second magnetic phase are isolated from each other; and a first absolute value of a temperature coefficient of saturation magnetization intensity of the first magnetic phase is less than 0.02%/° C.2. The high-temperature-stability permanent magnet material of claim 1 , wherein a size of the microstructure in at least one dimension is in a range from about 5 nanometers to about 800 nanometers.3. The high-temperature-stability permanent magnet material of claim 1 , wherein the first magnetic phase and the second magnetic phase are isolated from each other by encapsulation claim 1 , interlayer claim 1 , or both encapsulation and interlayer.4. The high-temperature-stability permanent magnet material ...

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Номер записи: 65
02-01-2020 дата публикации

GRADIENT ND-FE-B MAGNET AND A METHOD OF PRODUCTION

Номер: US20200005996A1
Автор: PENG Zhongjie, WANG Chuanshen, YANG Kunkun
Принадлежит:

A gradient Nd—Fe—B magnet includes an Nd—Fe—B magnet block extending along a magnetization direction and having a plurality of surfaces perpendicular to the magnetization direction. A first film, is disposed on one of the surfaces. A second film is disposed on another one of the surfaces, opposite of the one of the surfaces. The first film and the second film are diffused into the Nd—Fe—B magnet block dividing the Nd—Fe—B magnet block into an edge region, a transition region, and a central region along a plane perpendicular to the magnetization direction wherein the edge region has a coercivity that remains constant in a direction perpendicular to the magnetization direction, and the coercivity, along said magnetization direction, gradually decreases from the one of the surfaces and the another one of the surfaces towards a point located therebetween. A method of making the gradient Nd—Fe—B magnet is disclosed herein. 1. A gradient Nd—Fe—B magnet comprising:an Nd—Fe—B magnet block extending along a magnetization direction and having a plurality of surfaces perpendicular to said magnetization direction;a first film containing at least one heavy rare earth element, disposed on one of said surfaces, attached to said Nd—Fe—B magnet block and extending along a periphery of said one of said surfaces; anda second film containing at least one heavy rare earth element, disposed on another one of said surfaces, opposite of said one of said surfaces, attached to said Nd—Fe—B magnet block and extending along a periphery of said another one of said surfaces; andsaid first film and said second film being diffused into said Nd—Fe—B magnet block dividing said Nd—Fe—B magnet block into an edge region, a transition region, and a central region along a plane extending perpendicular to said magnetization direction;wherein said edge region has a coercivity that remains constant in a direction perpendicular to said magnetization direction, and said coercivity of said edge region, along ...

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Номер записи: 66
08-01-2015 дата публикации

Magnetic cooling apparatus

Номер: US20150007582A1
Автор: II Ju MUN, Jin Han Kim, Keon Kuk, Min Soo Kim, Woo Hyek CHOI, Young Dae Ko
Принадлежит: SAMSUNG ELECTRONICS CO LTD

A magnetic cooling apparatus including a plurality of magnetic regenerators including a plurality of magnetocaloric materials to emit heat when magnetized and to absorb heat when demagnetized. The magnetic regenerators are rotatably disposed on a circumference having a predetermined radius, at least one coil is disposed on the circumference and coupled to the magnetic regenerators, and a plurality of permanent magnets is provided inside and outside the circumference to generate a magnetic field to magnetize or demagnetize the magnetic regenerators. The at least one coil interacts with the magnetic field generated by the permanent magnets to rotate the magnetic regenerators. The coil interacting with the magnetic field to magnetize or demagnetize the magnetic regenerators is coupled to the magnetic regenerators such that the magnetic regenerators reciprocate or rotate, thereby minimizing a size of the magnetic cooling apparatus, relative to the use of a motor. In addition, a member to switch a channel of a heat transfer fluid directly performs heat transfer between the heat transfer fluid and an external fluid, thereby minimizing heat loss.

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Номер записи: 67
03-01-2019 дата публикации

RARE EARTH MAGNET AND PRODUCTION METHOD THEREOF

Номер: US20190006068A1
Автор: HAGA Kazuaki, MATSUURA Masashi, SAKUMA Noritsugu, SHOJI Tetsuya, Sugimoto Satoshi
Принадлежит:

To provide a rare earth magnet having excellent coercive force and a production method thereof. A rare earth magnet, wherein the rare earth magnet comprises a magnetic phase containing Sm, Fe, and N, a Zn phase present around the magnetic phase, and an intermediate phase present between the magnetic phase and the Zn phase, wherein the intermediate phase contains Zn and the oxygen content of the intermediate phase is higher than the oxygen content of the Zn phase; and a method for producing a rare earth magnet, including mixing a magnetic raw material powder having an oxygen content of 1.0 mass % or less and an improving agent powder containing metallic Zn and/or a Zn alloy, and heat-treating the mixed powder. 1. A rare earth magnet ,wherein the rare earth magnet comprises a magnetic phase containing Sm, Fe, and N, a Zn phase present around the magnetic phase, and an intermediate phase present between the magnetic phase and the Zn phase,wherein the intermediate phase contains Zn, andwherein the oxygen content of the intermediate phase is higher than the oxygen content of the Zn phase.2. The rare earth magnet according to claim 1 , wherein the oxygen content of the intermediate phase is from 1.5 to 20.0 times higher than the oxygen content of the Zn phase.3. The rare earth magnet according to claim 1 , wherein an Ia-3-type SmOphase is formed in the intermediate phase.4. The rare earth magnet according to claim 1 , wherein the magnetic phase contains a phase represented by (SmR)(FeCo)N(wherein R is one or more members selected from rare earth elements other than Sm claim 1 , and Y and Zr claim 1 , i is from 0 to 0.50 claim 1 , j is from 0 to 0.52 claim 1 , and h is from 1.5 to 4.5).5. The rare earth magnet according to claim 1 , wherein the texture parameter α represented by the formula: H=α·H−N·M(His the coercive force claim 1 , His the anisotropic magnetic field claim 1 , Mis the saturation magnetization claim 1 , and Nis the self-demagnetizing field coefficient) is ...

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Номер записи: 68
03-01-2019 дата публикации

NEAR NET SHAPE MANUFACTURING OF MAGNETS

Номер: US20190006098A1
Автор: Wang Yucong
Принадлежит:

A magnet and a method of near net shape forming the magnet are provided. The method includes printing a plurality of layers of magnetic powder material, layer by layer, to form the magnet having a three-dimensional shape and sintering the plurality of layers of magnetic powder material to harden the magnet. The method may also include applying a magnetic field to the magnetic powder material while printing the plurality of layers of magnetic powder material to orient the magnetic powder material in a desired direction. 1. A method of near net shape forming a magnet , the method comprising:printing a plurality of layers of magnetic powder material, layer by layer, to form the magnet having a three-dimensional shape; andsintering the plurality of layers of magnetic powder material to harden the magnet.2. The method of claim 1 , further comprising applying a magnetic field to the magnetic powder material while printing the plurality of layers of magnetic powder material to substantially orient the magnetic powder material in a desired direction.3. The method of claim 2 , wherein the step of printing the plurality of layers of magnetic powder material comprises printing a first plurality of layers that includes a binder material and printing a second plurality of layers that is free of binder material.4. The method of claim 3 , wherein the step of printing the plurality of layers of magnetic powder material comprises alternating first layers of the plurality of first layers with second layers of the plurality of second layers.5. The method of claim 4 , wherein the binder material is provided as a polymer-based material configured to enable adherence together of powder particles of the magnetic powder material.6. The method of claim 3 , wherein the step of sintering is performed at a sintering temperature claim 3 , the method further comprising heating the plurality of layers of magnetic powder material at a hardening temperature prior to the step of sintering claim 3 , ...

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Номер записи: 69
08-01-2015 дата публикации

METHOD OF MANUFACTURING HEXAGONAL FERRITE MAGNETIC PARTICLES

Номер: US20150010698A1
Автор: Hattori Yasushi, TAMADA Yoshinori
Принадлежит: FUJIFILM Corporation

The method of manufacturing hexagonal ferrite magnetic particles comprises applying an adhering matter comprising a glass component and an alkaline earth metal to hexagonal ferrite magnetic particles, and subjecting the hexagonal ferrite magnetic particles to which the adhering matter has been applied to a heat treatment. 1. A method of manufacturing hexagonal ferrite magnetic particles , which comprises:applying an adhering matter comprising a glass component and an alkaline earth metal to hexagonal ferrite magnetic particles; andsubjecting the hexagonal ferrite magnetic particles to which the adhering matter has been applied to a heat treatment.2. The method of manufacturing hexagonal ferrite magnetic particles according to claim 1 , which comprises causing the adhering matter to apply to the hexagonal ferrite magnetic particles by:conducting a first adhering treatment in which hexagonal ferrite magnetic particles are subjected to adhering with a glass component; andconducting a second adhering treatment in which the hexagonal ferrite magnetic particles after the first adhering treatment are subjected to adhering with an alkaline earth metal.3. The method of manufacturing hexagonal ferrite magnetic particles according to claim 1 , wherein the glass component is a hydrolysis product of a silicon compound.4. The method of manufacturing hexagonal ferrite magnetic particles according to claim 3 , wherein the silicon compound is alkoxysilane.5. The method of manufacturing hexagonal ferrite magnetic particles according to claim 3 , wherein the silicon compound is tetraethyl orthosilicate.6. The method of manufacturing hexagonal ferrite magnetic particles according to claim 2 , wherein the first adhering treatment is conducted by adding a precursor of the glass component to a solution comprising hexagonal ferrite magnetic particles and conducting stirring claim 2 , to subject the hexagonal ferrite magnetic particles to adhering with the glass component in the form of a ...

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Номер записи: 70
12-01-2017 дата публикации

HIGH FREQUENCY INDUCTION HEATING METHOD

Номер: US20170010163A1
Автор: Yamashita Osamu
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

A high frequency induction heating method includes: providing a film containing a component, which melts at a preset heating temperature, on a surface of a workpiece before heating the workpiece by high frequency induction heating using a high-frequency coil; and heating the workpiece by high frequency induction heating. 1. A high frequency induction heating method comprising:providing a film containing a component, which melts at a preset heating temperature, on a surface of a workpiece before heating the workpiece by high frequency induction heating using a high-frequency coil; andheating the workpiece by high frequency induction heating.2. The high frequency induction heating method according to claim 1 , whereinthe workpiece is a sintered compact which is a rare earth magnet precursor, andthe sintered compact is heated by high frequency induction heating while performing hot working on the sintered compact.3. The high frequency induction heating method according to claim 1 , whereinthe film is formed of a graphite lubricating liquid and a melting component which is contained in the film.4. The high frequency induction heating method according to claim 3 , whereinthe film is formed by applying a solution, which is obtained by adding the melting component to the graphite lubricating liquid, to the surface of the workpiece and drying the solution.5. The high frequency induction heating method according to claim 1 , whereinthe workpiece has a Nd—Fe—B-based main phase with a nanocrystalline structure and a grain boundary phase of a Nd—X alloy, where X: metal element, the grain boundary phase being present around the main phase.6. The high frequency induction heating method according to claim 5 , whereinthe Nd—X alloy constituting the grain boundary phase is any one of Nd—Co, Nd—Fe, Nd—Ga, Nd—Co—Fe, and Nd—Co—Fe—Ga, or is a mixture of at least two of Nd—Co, Nd—Fe, Nd—Ga, Nd—Co—Fe, and Nd—Co—Fe—Ga; andthe Nd—X alloy is in a Nd rich state. The disclosure of Japanese ...

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Номер записи: 71
10-01-2019 дата публикации

TAPE FORMAT MAGNETOELASTIC RESONATOR MARKERS

Номер: US20190011599A1
Автор: Doany Ziyad H., Shoemaker Curtis L., WANG Ding
Принадлежит: 3M INNOVATIVE PROPERTIES COMPANY

A tape format magnetoelastic resonator device comprises a continuous ribbon of amorphous magnetic material having a plurality of separate, hinged magnetoelastic resonator strips formed from the ribbon, linearly displaced along a longitudinal axis of the ribbon, wherein each magnetoelastic resonator strip is configured to couple to an external magnetic field at a particular frequency and convert the magnetic energy into mechanical energy, in the form of oscillations. 1. A tape format magnetoelastic resonator device , comprising:a tape or ribbon formed from an amorphous magnetic material having a longitudinal axis,wherein a first section of the tape includes a first slot configured to receive a first bias magnet,wherein a second section of the tape, adjacent to the first section along the longitudinal axis, comprises a first magnetoelastic resonator strip having first and second free ends and a central portion, the central portion connected to the tape via a hinge, andwherein a third section of the tape, adjacent to the second section along the longitudinal axis, includes a second slot configured to receive a second bias magnet.2. The tape format magnetoelastic resonator device of claim 1 , further comprising:a fourth section of the tape, adjacent to the third section along the longitudinal axis, comprising a second magnetoelastic resonator strip having first and second free ends and a central portion, the central portion connected to the tape via a hinge, anda fifth section of the tape, adjacent to the fourth section along the longitudinal axis, including a third slot configured to receive a third bias magnet.3. The tape format magnetoelastic resonator device of claim 1 , wherein the first magnetoelastic resonator strip is configured to couple to an external magnetic field at a particular frequency and convert the magnetic energy into mechanical energy claim 1 , in the form of oscillations.4. The tape format magnetoelastic resonator device of claim 1 , wherein the ...

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Номер записи: 72
14-01-2016 дата публикации

METHOD OF MANUFACTURING ALLOY FOR R-T-B-BASED RARE EARTH SINTERED MAGNET AND METHOD OF MANUFACTURING R-T-B-BASED RARE EARTH SINTERED MAGNET

Номер: US20160012946A1
Автор: Horikita Masaki, Nakajima Kenichiro, YAMAZAKI Takashi
Принадлежит: SHOWA DENKO K.K.

Provided is a method of manufacturing an alloy for an R-T-B-based rare earth sintered magnet, with which an R-T-B-based magnet having high coercive force can be obtained even when the B concentration is low and the Dy concentration is zero or extremely low. 1. A method of manufacturing an alloy for an R-T-B-based rare earth sintered magnet , comprising:a casting step of manufacturing a cast alloy by casting a molten alloy,a hydrogenating step of absorbing hydrogen in the cast alloy; anda dehydrogenating step of removing hydrogen from the cast alloy that absorbs hydrogen in an inert gas atmosphere at a temperature lower than 550° C.,wherein the molten alloy comprises B; a rare earth element R; a transition metal T comprising Fe; a metal element M that comprises at least one metal selected from the group consisting of Al, Ga, and Cu; and unavoidable impurities,the R content is 13 at % to 15.5 at %,the B content is 5.0 at % to 6.0 at %,the M content is 0.1 at % to 2.4 at %,the T content is a balance,a ratio of a Dy content to a total content of the rare earth element is 0 at % to 65 at %, and {'br': None, '0.32≦B/TRE≦0.40\u2003\u2003(1)'}, 'the molten alloy satisfies the below formula (1)wherein B represents a boron concentration (at %), and TRE represents a total concentration (at %) of all the rare earth elements in the formula (1).2. A method of manufacturing an alloy for an R-T-B-based rare earth sintered magnet , comprising:a casting step of manufacturing a cast alloy by casting a molten alloy,a hydrogenating step of absorbing hydrogen in the cast alloy; anda dehydrogenating step of removing hydrogen from the cast alloy that absorbs hydrogen in a vacuum at a temperature lower than 600° C.,wherein the molten alloy comprises B; a rare earth element R; a transition metal T comprises Fe; a metal element M that comprises at least one metal selected from the group consisting of Al, Ga, and Cu; and unavoidable impurities,the R content is 13 at % to 15.5 at %,the B ...

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Номер записи: 73
14-01-2016 дата публикации

RECEIVER COIL PART AND WEARABLE DEVICE WITH SAME

Номер: US20160012968A1
Автор: CHIU CHUANG-LUNG
Принадлежит:

A receiver coil part is applied to an open-ring or close-ring carrier part of a wearable device. The receiver coil part includes a contiguous conductive wire. The contiguous conductive wire can generate an induced current. Moreover, some of the conductive segments of the receiver coil part are selectively coated, covered or enclosed by a magnetic structure. Consequently, the magnetic field lines generated by the conductive segments are shielded by the magnetic structure. Moreover, the wearable device with the receiver coil part can be placed on a charging pad more flexibly. 1. A receiver coil part for generating an induced current in response to magnetic resonance or magnetic induction , the receiver coil part comprising:a contiguous conductive wire comprising at least one first conductive segment and at least one second conductive segment, wherein across a cross section of the contiguous conductive wire containing the first conductive segment and the second conductive segment, the direction of the induced current flowing through the first conductive segment and the direction of the induced current flowing through the second conductive segment are opposite to each other; andat least one magnetic structure arranged between the first conductive segment and the second conductive segment.2. The receiver coil part according to claim 1 , wherein the magnetic structure is formed on a portion or an entire of either an outer surface of the first conductive segment or an outer surface of the second conductive segment claim 1 , or the magnetic structure is fixed between a portion or an entire of the first conductive segment and a portion or an entire of the second conductive segment.3. The receiver coil part according to claim 1 , wherein the magnetic structure at least contains a permeability material selected from manganese-zinc ferrite claim 1 , nickel-zinc ferrite claim 1 , nickel-copper-zinc ferrite claim 1 , manganese-magnesium-zinc ferrite claim 1 , manganese-magnesium- ...

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Номер записи: 74
11-01-2018 дата публикации

HIGH RESISTIVITY IRON-BASED, THERMALLY STABLE MAGNETIC MATERIAL FOR ON-CHIP INTEGRATED INDUCTORS

Номер: US20180012953A1
Автор: "OSullivan Eugene J.", Deligianni Hariklia, Gallagher William J., Mason Maurice, Romankiw Lubomyr T., Wang Naigang
Принадлежит:

An on-chip magnetic structure includes a palladium activated seed layer and a substantially amorphous magnetic material disposed onto the palladium activated seed layer. The substantially amorphous magnetic material includes nickel in a range from about 50 to about 80 atomic % (at. %) based on the total number of atoms of the magnetic material, iron in a range from about 10 to about 50 at. % based on the total number of atoms of the magnetic material, and phosphorous in a range from about 0.1 to about 30 at. % based on the total number of atoms of the magnetic material. The magnetic material can include boron in a range from about 0.1 to about 5 at. % based on the total number of atoms of the magnetic material. 1. A method for forming an on-chip magnetic structure , the method comprising:activating a magnetic seed layer with palladium, the magnetic seed layer being positioned over a substrate; andelectrolessly plating a soft magnetic alloy onto the palladium in the presence of a magnetic field bias;wherein the soft magnetic alloy comprises nickel in a range from about 0.1 to about 80 at. % based on the total number of atoms of the soft metallic alloy, iron in a range from about 0.1 to about 50 at. % based on the total number of atoms of the soft metallic alloy, and phosphorous in a range from about 0.1 to about 30 at. % based on the total number of atoms in the soft metallic alloy.2. The method of claim 1 , wherein activating the magnetic seed layer comprises exposing the magnetic seed layer to a solution comprising palladium.3. The method of claim 2 , wherein the solution further comprises an acid.4. The method of claim 3 , wherein the palladium is present in an amount in a range from about 45 to about 65 ppm.5. The method of claim 3 , wherein the acid is sulfuric acid claim 3 , hydrochloric acid claim 3 , nitric acid claim 3 , or any combination thereof.6. The method of claim of claim 1 , wherein the soft metallic alloy's resistivity is at least 110 μΩ·cm.7. The ...

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Номер записи: 75
16-01-2020 дата публикации

Samarium-iron-nitrogen alloy powder and method for producing same

Номер: US20200016663A1
Автор: Kazuyuki Suzuki, Kenta Takagi, Kimihiro Ozaki, Shusuke Okada, Yasushi Enokido
Принадлежит: National Institute of Advanced Industrial Science and Technology AIST, TDK Corp

A samarium-iron-nitrogen alloy powder according to one embodiment of the present invention is characterized in that a value obtained by dividing the hydrogen content of the samarium-iron-nitrogen alloy powder by the BET specific surface area of the samarium-iron-nitrogen alloy powder is less than or equal to 400 ppm/(m2/g), and a value obtained by dividing the oxygen content of the samarium-iron-nitrogen alloy powder by the BET specific surface area of the samarium-iron-nitrogen alloy powder is less than or equal to 11,000 ppm/(m2/g).

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Номер записи: 76
03-02-2022 дата публикации

SM-FE-N-BASED MAGNET POWDER, SM-FE-N-BASED SINTERED MAGNET, AND PRODUCTION METHOD THEREFOR

Номер: US20220037065A1
Автор: SATO Yosuke, TAKAGI Kenta, Yamagata Ryoichi, YAMAGUCHI Wataru, Yokoyama Takaaki
Принадлежит:

A Sm—Fe—N-based magnet powder that includes a Sm—Fe—N-based magnetic material powder, wherein an average particle size of the Sm—Fe—N-based magnetic material powder is not larger than 5 μm, and a full width at half maximum of a diffraction peak of a (220) plane in an X-ray diffraction profile of the Sm—Fe—N-based magnetic material powder is not larger than 0.0033 Å. Also disclosed is a Sm—Fe—N-based sintered magnet that includes a sintered body of a Sm—Fe—N-based magnetic material, wherein an average grain size of crystal grains of the Sm—Fe—N-based magnetic material is not larger than 5 μm, and a full width at half maximum of a diffraction peak of a (220) plane in an X-ray diffraction profile of the Sm—Fe—N-based magnetic material is not larger than 0.0033 Å. 1. A Sm—Fe—N-based magnet powder , comprising:a Sm—Fe—N-based magnetic material powder, whereinan average particle size of the Sm—Fe—N-based magnetic material powder is not larger than 5 μm, anda full width at half maximum of a diffraction peak of a (220) plane in an X-ray diffraction profile of the Sm—Fe—N-based magnetic material powder is not larger than 0.0033 Å.2. The Sm—Fe—N-based magnet powder according to claim 1 , wherein the average particle size of the Sm—Fe—N-based magnetic material powder is 0.04 μm to 5 μm.3. The Sm—Fe—N-based magnet powder according to claim 1 , wherein the average particle size of the Sm—Fe—N-based magnetic material powder is not larger than 3 μm.4. The Sm—Fe—N-based magnet powder according to claim 3 , wherein the average particle size of the Sm—Fe—N-based magnetic material powder is 0.04 μm to 3 μm.5. The Sm—Fe—N-based magnet powder according to claim 1 , wherein the Sm—Fe—N-based magnetic powder is SmFeN.6. The Sm—Fe—N-based magnet powder according to claim 1 , wherein the full width at half maximum of the diffraction peak of the (220) plane in the X-ray diffraction profile of the Sm—Fe—N-based magnetic material powder is 0.0001 Å to 0.0033 Å.7. The Sm—Fe—N-based magnet ...

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Номер записи: 77
16-01-2020 дата публикации

PLATE-SHAPED MAGNETIC WORK BODY AND MAGNETIC HEAT PUMP DEVICE USING SAME

Номер: US20200018525A1
Автор: BAE Sangchul, TAKEDA Makoto, Uno Takaaki, Yamaguchi Yusuke
Принадлежит:

There are provided a magnetic work body capable of being easily laminated and a magnetic heat pump device using the same. A magnetic work body is provided with a plate-shaped body formed of a magnetic work substance, in which a gap forming deformation portion serving as a gap adjusting member in laminating is formed in the plate-shaped body. 1. A plate-shaped magnetic work body comprising:a plate-shaped body formed of a magnetic work substance,wherein a gap forming deformation portion serving as a gap adjusting member in laminating is formed in the plate-shaped body.2. The plate-shaped magnetic work body according to claim 1 ,wherein the gap forming deformation portion contains a plurality of cut and raised pieces individually formed in a width direction and a longitudinal direction of the plate-shaped body, andthe cut and raised pieces are disposed to be aligned in a flowing direction of a heat medium of the plate-shaped body.3. The plate-shaped magnetic work body according to claim 1 ,wherein the gap forming deformation portion contains the cut and raised pieces formed in at least three places of the plate-shaped body.4. The plate-shaped magnetic work body according to claim 1 ,wherein the gap forming deformation portion contains bent portions formed at least along facing sides of the plate-shaped body.5. The plate-shaped magnetic work body according to claim 4 ,wherein the bent portions are formed along a flow passage of a heat medium.6. The plate-shaped magnetic work body according to claim 1 ,wherein the plate-shaped body has a configuration in which two or more of the magnetic work substances different in a temperature zone where a high magnetocaloric effect is exhibited are arranged in one direction in such a manner that the temperature zones become high in order.7. The plate-shaped magnetic work body according to claim 1 ,wherein the magnetic work substance is any one of an Mn-based material and an La-based material.8. The plate-shaped magnetic work body ...

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Номер записи: 78
17-04-2014 дата публикации

ALLOY, MAGNET CORE AND METHOD FOR PRODUCING A STRIP FROM AN ALLOY

Номер: US20140104024A1
Автор: HERZER Giselher, MARSILIUS Mie, POLAK Christian
Принадлежит: Vacuumschmelze GmbH & Co. KG

An alloy of FeCuNbMTSiBZand up to 1 atomic % impurities; M is one or more of Mo or Ta, T is one or more of V, Cr, Co or Ni and Z is one or more of C, P or Ge, wherein 0.0 atomic % a <1.5 atomic %, 0.0 atomic % b <3.0 atomic %, 0.2 atomic % c 4.0 atomic %, 0.0 atomic % d <5.0 atomic %, 12.0 atomic % Подробнее

Номер записи: 79
28-01-2016 дата публикации

SLURRY RECYCLING METHOD, PRODUCING METHOD OF RARE EARTH SINTERED MAGNET AND SLURRY RECYCLING APPARATUS

Номер: US20160023276A1
Автор: MOCHIZUKI Mitsuaki
Принадлежит: HITACHI METALS, LTD.

The present invention provides a producing method of a rare earth sintered magnet which is suitable as a producing method of a high performance rare earth sintered magnet which can reduce the number of steps for reusing defective molded bodies generated in a wet molding step of the rare earth sintered magnet, and which has a small content amount of oxygen. The invention also provides a slurry recycling method used for the producing method, and a slurry recycling apparatus. Each of the methods includes a crushing step of crushing, in mineral oil and/or synthetic fluid, a molded body in which slurry formed from alloy powder for a rare earth sintered magnet and mineral oil and/or synthetic fluid is wet molded in magnetic field, and recycling the crushed molded body into slurry. 1. A slurry recycling method comprising a crushing step of crushing , in mineral oil and/or synthetic fluid , a molded body in which slurry formed from alloy powder for a rare earth sintered magnet and mineral oil and/or synthetic fluid is wet molded in magnetic field , and recycling the crushed molded body into slurry.2. The slurry recycling method according to claim 1 , wherein a particle diameter of the alloy powder for a rare earth sintered magnet in the recycled slurry which is recycled by the crushing step is not changed from a particle diameter of the alloy powder for the rare earth sintered magnet before it is recycled by the crushing step.3. The slurry recycling method according to claim 1 , wherein the crushing step includes a filtering step of removing foreign matters.4. A producing method of a rare earth sintered magnet comprising a crushing step of crushing claim 1 , in mineral oil and/or synthetic fluid claim 1 , a molded body in which slurry formed from alloy powder for a rare earth sintered magnet and mineral oil and/or synthetic fluid is wet molded in magnetic field claim 1 , and recycling the crushed molded body into slurry; anda recycled slurry sintering step of wet molding, ...

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Номер записи: 80
16-01-2020 дата публикации

RARE-EARTH PERMANENT MAGNET

Номер: US20200020468A1
Автор: FUKUCHI Eiichiro, Hashimoto Ryuji, Ito Masashi, NAGAMINE Yuki
Принадлежит: TDK Corporation

To provide a rare earth permanent magnet having as a main phase a compound with a NdFecrystalline structure having strong coercive force. A rare earth permanent magnet having as a main phase a compound with a NdFecrystalline structure, wherein when the composition ratio of the rare earth permanent magnet is expressed as RTC, where R is one or more rare earth elements requiring Sm, and T is one or more transition metal elements requiring Fe or Fe and Co, a and b satisfy 1810.0 at % are satisfied in which c1 (at %) represents a compositional ratio of C in the main phase and c2 (at %) represents a compositional ratio of C in the phase having higher concentration of R and C compared to the main phase.4. The rare-earth permanent magnet according to claim 2 , wherein c1<3.0 at % and c2−c1>10.0 at % are satisfied in which c1 (at %) represents a compositional ratio of C in the main phase and c2 (at %) represents a compositional ratio of C in the phase having higher concentration of R and C compared to the ...

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Номер записи: 81
22-01-2015 дата публикации

SOFT MAGNETIC EXCHANGE-COUPLED COMPOSITE STRUCTURE, AND HIGH-FREQUENCY DEVICE COMPONENT, ANTENNA MODULE, AND MAGNETORESISTIVE DEVICE INCLUDING THE SOFT MAGNETIC EXCHANGE-COUPLED COMPOSITE STRUCTURE

Номер: US20150024236A1
Автор: AHN Kyung-han, KANG Young-jae, KANG Young-min, LEE Sang-mock
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A soft magnetic exchange-coupled composite structure, and a high-frequency device component, an antenna module, and a magnetoresistive device including the soft magnetic exchange-coupled composite structure, include a ferrite crystal grain as a main phase and a soft magnetic metal thin film bound to the ferrite crystal grain by interfacial bonding on an atomic scale. A region of the soft magnetic metal thin film adjacent to an interface with the ferrite crystal grain includes a crystalline soft magnetic metal. 1. A soft magnetic exchange-coupled composite structure , comprising:a ferrite crystal grain as a main phase; anda soft magnetic metal as an auxiliary phase bonded to the ferrite crystal grain by interfacial bonding on an atomic scale,wherein a region of the soft magnetic metal adjacent to an interface with the ferrite crystal grain includes a crystalline soft magnetic metal.2. The soft magnetic exchange-coupled composite structure of claim 1 , wherein the ferrite crystal grain is at least one selected from the group consisting of hexagonal ferrite claim 1 , spinel ferrite claim 1 , and garnet ferrite.3. The soft magnetic exchange-coupled composite structure of claim 1 , wherein the soft magnetic metal is at least one selected from the group consisting of iron (Fe) claim 1 , cobalt (Co) claim 1 , nickel (Ni) claim 1 , manganese (Mn) claim 1 , and an alloy thereof.4. The soft magnetic exchange-coupled composite structure of claim 1 , wherein the ferrite crystal grain has a thin film structure or a particle structure.5. The soft magnetic exchange-coupled composite structure of claim 4 , wherein the soft magnetic metal has a thin film structure.6. The soft magnetic exchange-coupled composite structure of claim 1 , whereinthe soft magnetic metal has a thin film structure, anda total thickness of the soft magnetic metal thin film bonded to the ferrite crystal grain by interfacial bonding on the atomic scale is 1 nm or greater.7. The soft magnetic exchange-coupled ...

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Номер записи: 82
28-01-2016 дата публикации

MAGNETIC REFRIGERATION SYSTEM WITH SEPARATED INLET AND OUTLET FLOW

Номер: US20160025385A1
Автор: Auringer Jon Jay, Boeder Andre Michael, Chell Jeremy Jonathan, Leonard John Paul, Zimm Carl Bruno
Принадлежит:

An active magnetic regenerative (AMR) refrigerator apparatus can include at least one AMR bed with a first end and a second end and a first heat exchanger (HEX) with a first end and a second end. The AMR refrigerator can also include a first pipe that fluidly connects the first end of the first HEX to the first end of the AMR bed and a second pipe that fluidly connects the second end of the first HEX to the first end of the AMR bed. The first pipe can divide into two or more sub-passages at the AMR bed. The second pipe can divide into two or more sub-passages at the AMR bed. The sub-passages of the first pipe and the second pipe can interleave at the AMR bed. 1. An active magnetic regenerative (AMR) refrigerator apparatus , comprising:at least one AMR bed with a first end and a second end;a first heat exchanger (HEX) with a first end and a second end;a first pipe that fluidly connects the first end of the first HEX to the first end of the AMR bed;a second pipe that fluidly connects the second end of the first HEX to the first end of the AMR bed; andwherein the first pipe divides into two or more sub-passages at the AMR bed,wherein the second pipe divides into two or more sub-passages at the AMR bed, andwherein the sub-passages of the first pipe and the second pipe interleave at the AMR bed.2. The apparatus of claim 1 , further comprising a pump configured to drive heat transfer fluid through the first pipe claim 1 , the second pipe claim 1 , the first HEX claim 1 , and pores of the AMR bed.3. The apparatus of claim 1 , wherein the sub-passages of the first pipe are extensions of the first pipe in a direction substantially perpendicular to the first pipe.4. The apparatus of claim 1 , wherein the sub-passages fluidly connect to the AMR bed by slots.5. The apparatus of claim 1 , further comprising:a second heat exchanger (HEX) with a first end and a second end;a third pipe that fluidly connects the first end of the second HEX to the second end of the AMR bed;a fourth ...

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Номер записи: 83
10-02-2022 дата публикации

Secondary particles for anisotropic magnetic powder and method of producing anisotropic magnetic powder

Номер: US20220041447A1
Автор: Hisashi Maehara
Принадлежит: Nichia Corp

Provided are a method of producing a titanium-containing rare earth-iron-nitrogen anisotropic magnetic powder having good magnetic properties, and secondary particles for a titanium-containing anisotropic magnetic powder. The method includes: obtaining a first precipitate containing R, iron, and titanium by mixing a first precipitating agent with a solution containing R, iron, and titanium, wherein R is at least one selected from Sc, Y, Pr, Nd, Pm, Sm, Gd, Tb, Dy, Ho, Er, Tm, and Lu; obtaining a second precipitate containing R and iron by mixing, in the presence of the first precipitate, a second precipitating agent with a solution containing R and iron; obtaining an oxide containing R, iron, and titanium by calcining the second precipitate; obtaining a partial oxide by heat treating the oxide in a reducing gas atmosphere; obtaining alloy particles by reducing the partial oxide; and obtaining an anisotropic magnetic powder by nitriding the alloy particles.

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Номер записи: 84
24-04-2014 дата публикации

MAGNETIC HEATING AND COOLING DEVICE

Номер: US20140109597A1
Автор: Tasaki Yutaka, Utaka Yoshio
Принадлежит:

A magnetic heating and cooling device is provided that comprises a heat exchanger that includes a magnetic body having a magnetocaloric effect; a magnetic field applying and removing unit that selectively applies to or removes from the magnetic body a magnetic field; and a liquid refrigerant moving unit that reciprocates a liquid refrigerant from one end to the other end, or from the other end to the one end, of the heat exchanger to exchange heat with the magnetic body inside the heat exchanger. The magnetic body is constituted by a plurality of flat magnetic members. At least one flat magnetic member has at least one slit that opens in the direction perpendicular to the movement direction of the liquid refrigerant, and the open end of each slit forms a corner to increase heat exchange efficiency. 1. A magnetic cooling and heating device comprising:a heat exchanger in which a magnetic body having a magnetocaloric effect is disposed;a magnetic field applying and removing unit to selectively apply to and remove from the magnetic body a magnetic field; anda liquid refrigerant moving unit that moves liquid refrigerant from a first end to a second end of the heat exchanger or from the second end to the first end to exchange heat with the magnetic body in the heat exchanger, whereinthe magnetic body is composed of at least one flat magnetic member having at least one flow passage that opens in a direction perpendicular to a direction of movement of the liquid refrigerant, an opening end of the at least one flow passage has a corner, and the at least one flat magnetic member has at least one corner at portions other than the opening end in at least one of the flow passages.2. (canceled)3. The magnetic cooling and heating device as claimed in claim 1 , wherein a plurality of flow passages formed in the flat magnetic member open parallel to the magnetic field applied by the magnetic field applying and removing unit.4. The magnetic cooling and heating device as claimed in ...

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Номер записи: 85
29-01-2015 дата публикации

COOLING DEVICE INCLUDING AN ELECTROCALORIC COMPOSITE

Номер: US20150027132A1
Автор: CHENG Ailan, ZHANG Qiming
Принадлежит:

Cooling devices, heat pumps, and climate controlling devices employing an electrocaloric composite of high thermal conductivity and significant electrocaloric effect are disclosed. The electrocaloric composites include a combination of one or more EC-fluoropolymers and their blends with one or more electric-insulating fillers of high thermal conductivity. 1. A cooling device comprising a high thermal conductivity electrocaloric (EC) composite as the refrigerant , wherein the high thermal conductivity electrocaloric composite can cycle through a temperature increase and decrease.2. The device of claim 1 , wherein the high thermal conductivity EC composite has a thermal conductivity claim 1 , along one direction claim 1 , higher than 0.5 W/mK in the temperature range from 0° C. to 50° C.3. The device of claim 1 , wherein the high thermal conductivity EC composite has a thermal conductivity claim 1 , along one direction claim 1 , higher than 1 W/mK in the temperature range from 0° C. to 50° C.4. The device of claim 1 , wherein the high thermal conductivity EC composite has a thermal conductivity claim 1 , along one direction claim 1 , higher than 1 W/mK in the temperature range from −20° C. to 70° C.5. The device of claim 1 , wherein the high thermal conductivity EC composite comprises one or more EC fluoropolymers having a significant electrocaloric effect in combination with one or more fillers claim 1 , wherein the one or more fillers are electrically insulating and have high thermal conductivity.6. The device of claim 5 , wherein the one or more EC fluoropolymers include a fluoropolymer made from vinylidene fluoride (VDF) based polymers which contain at least one additional fluoro-monomer including trifluoroethylene (TrFE) claim 5 , chlorofluoroethylene (CFE) claim 5 , chlorodifluoroethylene (CDFE) claim 5 , chlorotrifluoroethylene (CTFE) claim 5 , tetrafluoroethylene (TFE) claim 5 , hexafluoropropylene (HFP) claim 5 , hexafluoroethylene (HFE) claim 5 , vinylidene ...

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Номер записи: 86
29-01-2015 дата публикации

VARIABLE HEAT PUMP USING MAGNETO CALORIC MATERIALS

Номер: US20150027133A1
Автор: Benedict Michael Alexander
Принадлежит: GENERAL ELECTRIC COMPANY

A heat pump system is provided that uses multiple stages of MCMs with different Curie temperature ranges. An adjustable fluid flow path is used whereby the number of stages through which a heat transfer fluid passes can be varied depending upon e.g., the amount of heating or cooling desired. In certain embodiments, a magnetic field used to activate the MCMs can be manipulated so that the number of stages of MCMs that are activated also be adjusted. These and other features can improve the operating efficiency of the heat pump.

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Номер записи: 87
28-01-2016 дата публикации

METHOD OF MANUFACTURING RARE EARTH MAGNET

Номер: US20160027565A1
Автор: Kano Akira, Sakuma Daisuke
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

A method of manufacturing a rare earth magnet includes: a first step of manufacturing a sintered compact by press-forming a powder for the rare earth magnet; a second step of manufacturing a rare earth magnet precursor by performing hot deformation processing on the sintered compact to impart anisotropy to the sintered compact; and a third step of manufacturing the rare earth magnet by cooling the rare earth magnet precursor at a cooling rate of 10° C./sec or higher. 1. A method of manufacturing a rare earth magnet , the method comprising:manufacturing a sintered compact by press-forming a powder for the rare earth magnet;manufacturing a rare earth magnet precursor by performing hot deformation processing on the sintered compact to impart anisotropy to the sintered compact; andmanufacturing the rare earth magnet by cooling the rare earth magnet precursor at a cooling rate of 10° C./sec or higher.2. The method of manufacturing the rare earth magnet according to claim 1 , whereinwhen the rare earth magnet is manufactured by cooling the rare earth magnet precursor at a cooling rate of 10° C./sec or higher, after the cooling of the rare earth magnet precursor, an annealing treatment is performed.3. The method of manufacturing the rare earth magnet according to claim 1 , whereinwhen the rare earth magnet is manufactured by cooling the rare earth magnet precursor at a cooling rate of 10° C./sec or higher, after the cooling of the rare earth magnet precursor, an annealing treatment is performed, and a modified alloy containing a transition metal element and a light rare earth element is diffusely infiltrated into a grain boundary phase.4. The method of manufacturing the rare earth magnet according to claim 1 , whereinwhen the sintered compact is manufactured by press-forming the powder for the rare earth magnet, the sintered compact contains a structure,{'sub': x', 'y', 'z', 's', 't, 'the structure is represented by a compositional formula (Rl)(Rh)TBM, where Rl represents ...

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Номер записи: 88
25-01-2018 дата публикации

APPLIED MAGNETIC FIELD SYNTHESIS AND PROCESSING OF IRON NITRIDE MAGNETIC MATERIALS

Номер: US20180025841A1
Автор: Jiang Yanfeng, Wang Jian-Ping
Принадлежит: Regents of the University of Minnesota

Techniques are disclosed concerning applied magnetic field synthesis and processing of iron nitride magnetic materials. Some methods concern casting a material including iron in the presence of an applied magnetic field to form a workpiece including at least one ironbased phase domain including uniaxial magnetic anisotropy, wherein the applied magnetic field has a strength of at least about 0.01 Tesla (T). Also disclosed are workpieces made by such methods, apparatus for making such workpieces and bulk materials made by such methods. 1. A workpiece comprising:at least one anisotropically-shaped iron-based grain, wherein the at least one anisotropically-shaped iron-based grain comprises an aspect ratio of between about 1.1 and about 50, and wherein the aspect ratio is defined as the ratio of the length of a longest dimension to the length of a shortest dimension of the anisotropic grain, where the longest dimension and shortest dimension are substantially orthogonal.2. The workpiece of claim 1 , wherein the at least one anisotropically-shaped iron-based grain defines a shortest dimension of between about 5 nm and about 300 nm.3. The workpiece of claim 1 , wherein the at least one anisotropically-shaped iron-based grain comprises a plurality of anisotropically-shaped iron-based grains claim 1 , and wherein respective long axes of the plurality of anisotropically-shaped iron-based grains are oriented substantially parallel to each other.4. The workpiece of claim 1 , further comprising at least one iron-based phase domain including uniaxial magnetic anisotropy claim 1 , wherein the longest dimension of the at least one anisotropically-shaped iron-based grain is substantially parallel to the direction of the uniaxial magnetic anisotropy.5. The workpiece of claim 1 , wherein the at least one anisotropically-shaped iron-based grain comprises iron-nitride.6. The workpiece of claim 5 , wherein the iron nitride comprises α″-FeN.7. The workpiece of claim 1 , wherein the at ...

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Номер записи: 89
24-04-2014 дата публикации

ND-FE-B PERMANENT MAGNET WITHOUT DYSPROSIUM, ROTOR ASSEMBLY, ELECTROMECHANICAL TRANSDUCER, WIND TURBINE

Номер: US20140110948A1
Автор: SEMMER Silvio, Urda Adriana Cristina
Принадлежит:

An Nd—Fe—B permanent magnet is disclosed. The Nd—Fe—B permanent magnet includes 28-34 weight % of rare earth elements, where the content of Dy is smaller than 0.1 weight % and the Nd—Fe—B permanent magnet has a spatial extension parallel to a magnetization direction of the Nd—Fe—B permanent magnet which is larger than 30 mm. Further described is a rotor assembly for an electro-mechanical transducer. The rotor assembly includes at least one of such an Nd—Fe—B permanent magnet. Further described is an electromechanical transducer including such a rotor assembly and a wind turbine including said electromechanical transducer. 1. A Nd—Fe—B permanent magnet comprising:28-34 weight % of rare earth elements, wherein the content of the rare earth element Dy is smaller than 0.1 weight %,wherein the Nd—Fe—B permanent magnet has a spatial extension parallel to a magnetization direction of the Nd—Fe—B permanent magnet which is larger than 30 mm.2. The Nd—Fe—B permanent magnet as set forth in claim 1 ,wherein the content of Dy is smaller than 0.01 weight %.3. The Nd—Fe—B permanent magnet as set forth in claim 1 ,wherein the spatial extension parallel to the magnetization direction of the Nd—Fe—B permanent magnet is larger than 35 mm.4. The Nd—Fe—B permanent magnet as set forth in claim 1 ,whereina further spatial extension perpendicular to the magnetization direction of the Nd—Fe—B permanent magnet is at least 80 mm.5. The Nd—Fe—B permanent magnet as set forth in claim 1 , whereinthe intrinsic coercivity HcJ of the Nd—Fe—B permanent magnet at a temperature of 20° C. is less than 1200 kA/m and in particular less than 1000 kA/m.6. The Nd—Fe—B permanent magnet as set forth in claim 1 ,wherein the intrinsic coercivity HcJ of the Nd—Fe—B permanent magnet at a temperature of 60° C. is less than 800 kA/m and in particular less than 600 kA/m.7. A rotor assembly for an electromechanical transducer claim 1 , where the electromechanical transducer is a generator of a wind turbine claim 1 , ...

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Номер записи: 90
23-01-2020 дата публикации

MAGNETO-CALORIC THERMAL DIODE ASSEMBLY WITH A HEAT TRANSFER FLUID CIRCUIT

Номер: US20200025422A1
Автор: Schroeder Michael Goodman
Принадлежит:

A magneto-caloric thermal diode assembly includes a magneto-caloric cylinder. A plurality of thermal stages is stacked along an axial direction between a cold side and a hot side. A hot side heat exchanger is positioned at the hot side of the plurality of thermal stages. The hot side heat exchanger includes a plurality of pins or plates for rejecting heat to ambient air about the hot side heat exchanger. A cold side heat exchanger is positioned at the cold side of the plurality of thermal stages. A heat transfer fluid is flowable through the cold side heat exchanger. The cold side heat exchanger is configured such that the heat transfer fluid rejects heat to the cold side of the plurality of thermal stages when the heat transfer fluid flows through the cold side heat exchanger. 1. A magneto-caloric thermal diode assembly , comprising:a magneto-caloric cylinder;a plurality of thermal stages stacked along an axial direction between a cold side and a hot side, each of the plurality of thermal stages comprises a plurality of magnets and a non-magnetic ring, the plurality of magnets distributed along a circumferential direction within the non-magnetic ring in each of the plurality of thermal stages, the plurality of thermal stages and the magneto-caloric cylinder configured for relative rotation between the plurality of thermal stages and the magneto-caloric cylinder; anda hot side heat exchanger positioned at the hot side of the plurality of thermal stages, the hot side heat exchanger comprising a plurality of pins or plates for rejecting heat to ambient air about the hot side heat exchanger; anda cold side heat exchanger positioned at the cold side of the plurality of thermal stages, a heat transfer fluid flowable through the cold side heat exchanger, the cold side heat exchanger configured such that the heat transfer fluid rejects heat to the cold side of the plurality of thermal stages when the heat transfer fluid flows through the cold side heat exchanger.2. The ...

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Номер записи: 91
23-01-2020 дата публикации

MAGNETO-CALORIC THERMAL DIODE ASSEMBLY WITH A ROTATING HEAT EXCHANGER

Номер: US20200025423A1
Автор: Schroeder Michael Goodman
Принадлежит:

A magneto-caloric thermal diode assembly includes a magneto-caloric cylinder. A plurality of thermal stages is stacked along an axial direction between a cold side and a hot side. A heat exchanger includes a cylindrical stator positioned at and in thermal communication with the cold side or the hot side of the plurality of thermal stages. A cylindrical rotor is spaced from the cylindrical stator by a cylindrical gap. The cylindrical rotor is configured to rotate relative to the cylindrical stator about a rotation axis. A shearing liquid zone is defined between a surface of the cylindrical stator that faces the cylindrical gap and a surface of the cylindrical rotor that faces the cylindrical gap when the cylindrical gap is filled with a liquid. 1. A magneto-caloric thermal diode assembly , comprising:a magneto-caloric cylinder;a plurality of thermal stages stacked along an axial direction between a cold side and a hot side, each of the plurality of thermal stages comprises a plurality of magnets and a non-magnetic ring, the plurality of magnets distributed along a circumferential direction within the non-magnetic ring in each of the plurality of thermal stages, the plurality of thermal stages and the magneto-caloric cylinder configured for relative rotation between the plurality of thermal stages and the magneto-caloric cylinder; and a cylindrical stator positioned at and in thermal communication with the cold side or the hot side of the plurality of thermal stages;', 'a cylindrical rotor spaced from the cylindrical stator by a cylindrical gap, the cylindrical rotor configured to rotate relative to the cylindrical stator about a rotation axis;', 'wherein a shearing liquid zone is defined between a surface of the cylindrical stator that faces the cylindrical gap and a surface of the cylindrical rotor that faces the cylindrical gap when the cylindrical gap is filled with a liquid., 'a heat exchanger comprising'}2. The magneto-caloric thermal diode assembly of claim 1 , ...

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Номер записи: 92
28-01-2021 дата публикации

APPARATUS AND METHOD FOR ESTABLISHING A TEMPERATURE GRADIENT

Номер: US20210025625A1
Автор: BÖHM Gerald, HIRSCHMANNER Rudolf, MAIERHOFER Siegfried
Принадлежит:

Apparatus and method for establishing a temperature gradient, comprising at least one gas-tight working space having a first boundary layer that is connected to a first electrode and a second boundary layer that is connected to a second electrode, wherein when an electric voltage is applied between the first electrode and the second electrode in the working space, an electric field can be produced between the first boundary surface and the second boundary surface, and wherein a distance between the first boundary surface and the second boundary surface is less than 5000 nm, wherein the first boundary surface comprises at least one field-enhancement device, in particular a peak, so that if an electric voltage is applied to the electrodes, a field strength of the electric field in a region of the field-enhancement device is greater than an average field strength of the electric field in the working space. 1. An apparatus for establishing a temperature gradient , comprising at least one gas-tight working space having a first boundary layer that is connected to a first electrode and a second boundary layer that is connected to a second electrode , wherein when an electric voltage is applied between the first electrode and the second electrode in the working space , an electric field can be produced between the first boundary surface and the second boundary surface , and wherein a distance between the first boundary surface and the second boundary surface is less than 5000 nm , wherein the first boundary surface comprises at least one field-enhancement device , in particular a peak , so that if an electric voltage is applied to the electrodes , a field strength of the electric field in a region of the field-enhancement device is greater than an average field strength of the electric field in the working space.2. The apparatus according to claim 1 , wherein an electric field strength at the field-enhancement device is greater than an average electric field strength in the ...

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Номер записи: 93
10-02-2022 дата публикации

RARE EARTH-SINTERED MAGNET, METHOD OF MANUFACTURING A RARE EARTH-SINTERED BODY, METHOD OF MANUFACTURING A RARE EARTH-SINTERED MAGNET, AND LINEAR MOTOR USING A RARE EARTH-SINTERED MAGNET

Номер: US20220044852A1
Автор: FUJIKAWA Kenichi, Hirano Yuki, Kume Katsuya, Ozaki Takashi, SAITO Shoichiro, Yamamoto Takashi
Принадлежит:

Disclosed is a rare earth-sintered magnet in which a plurality of magnetic material particles are sintered. Surface magnetic flux density has a greatest value of 350 mT to 600 mT, the rare earth-sintered magnet has a thickness of 1.5 mm to 6 mm, a cross section of the rare earth-sintered magnet taken along a thickness direction is non-circular, and the cross section has an area in which axes of easy magnetization of the magnetic material particles has polar anisotropic orientation. 1. A rare earth-sintered magnet in which a plurality of magnetic material particles are sintered ,wherein surface magnetic flux density has a greatest value of 350 mT to 600 mT,wherein the rare earth-sintered magnet has a thickness of 1.5 mm to 6 mm,wherein a cross section of the rare earth-sintered magnet taken along a thickness direction is non-circular, andwherein the cross section has an area in which axes of easy magnetization of the magnetic material particles has polar anisotropic orientation.2. The rare earth-sintered magnet according to claim 1 , wherein in the non-circular cross section claim 1 , a ratio of the thickness to a length in a direction perpendicular to the thickness direction is in the range of 0.1 to 0.3.3. A method of manufacturing a rare earth-sintered body whose cross section taken along a thickness direction is non-circular and which has an area having polar anisotropic orientation claim 1 , the method comprising:a step of forming polar anisotropic orientation of at least a portion of an area in a compact by applying a pulsed magnetic field to the compact, the compact being obtained by molding a mixture having magnet powder and a polymer resin; anda step of sintering the compact having polar anisotropic orientation.4. A method of manufacturing a rare earth-sintered body comprising:a step of orienting at least a portion of an area in a compact by applying a pulsed magnetic field to the compact, the compact being obtained by molding a mixture having magnet powder ...

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Номер записи: 94
10-02-2022 дата публикации

NdFeB alloy powder for forming high-coercivity sintered NdFeB magnets and use thereof

Номер: US20220044853A1
Автор: DING Kaihong, PENG Zhongjie, YANG Kunkun
Принадлежит:

The disclosure provides a novel NdFeB alloy powder for forming high-coercivity sintered NdFeB magnets. The NdFeB alloy powder includes NdFeB alloy core particles with a mixed metal coating. The mixed metal coating is formed by simultaneously vapor deposition of 1. A NdFeB alloy powder for forming high-coercivity sintered NdFeB magnets , the NdFeB alloy powder including NdFeB alloy core particles with a mixed metal coating , wherein the mixed metal coating is formed by simultaneously vapor deposition ofa) at least one high-melting metal M selected from the group consisting of Mo, W, Zr, Ti, and Nb; andb) at least one metal R, where R is selected from the group consisting of Pr, Nd, La, and Ce; ora metal alloy RX, where X is one selected from the group consisting of Cu, Al, and Ga and R is at least one selected from the group consisting of Pr, Nd, La, and Ce.2. The NdFeB alloy powder according to claim 1 , wherein an average particle size D50 of the NdFeB alloy core particles is in the range of 2 to 6 μm.3. The NdFeB alloy powder according to claim 1 , wherein a thickness of the mixed metal coating is in the range of 3 to 100 nm.4. The NdFeB alloy powder according to claim 2 , wherein a thickness of the mixed metal coating is in the range of 3 to 100 nm.5. The NdFeB alloy powder according to claim 1 , wherein a weight ratio of the metal R or metal alloy RX to the high-melting metal M in the mixed metal coating is in the range of 5:1 to 50:1.6. The NdFeB alloy powder according to claim 2 , wherein a weight ratio of the metal R or metal alloy RX to the high-melting metal M in the mixed metal coating is in the range of 5:1 to 50:1.7. The NdFeB alloy powder according to claim 3 , wherein a weight ratio of the metal R or metal alloy RX to the high-melting metal M in the mixed metal coating is in the range of 5:1 to 50:1.8. The NdFeB alloy powder according to claim 4 , wherein a weight ratio of the metal R or metal alloy RX to the high-melting metal M in the mixed metal ...

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Номер записи: 95
10-02-2022 дата публикации

NdFeB alloy powder for forming high-coercivity sintered NdFeB magnets and use thereof

Номер: US20220044854A1
Автор: DING Kaihong, PENG Zhongjie, YANG Kunkun
Принадлежит:

The disclosure refers to a NdFeB alloy powder for forming high-coercivity sintered NdFeB magnets. The NdFeB alloy powder includes NdFeB alloy core particles with a multi-layered coating, wherein the multi-layered coating comprises: 1. A NdFeB alloy powder for forming high-coercivity sintered NdFeB magnets , the NdFeB alloy powder including NdFeB alloy core particles with a multi-layered coating , wherein the multi-layered coating comprises:a first metal layer directly disposed on the NdFeB alloy core particles wherein the first metal layer consists of at least one of Tb and Dy;a second metal layer directly disposed on the first metal layer, wherein the second metal layer consists of at least one of W, Mo, Ti, Zr, and Nb; anda third metal layer directly disposed on the second metal layer, wherein the third metal layer consists of (i) at least one of Pr, Nd, La, and Ce; or (ii) a combination of one selected from the group consisting of Cu, Al, and Ga and at least one selected from the group consisting of Pr, Nd, La, and Ce.2. The NdFeB alloy powder according to claim 1 , wherein an average particle size D50 of the NdFeB alloy core particles is in the range of 2 to 6 μm.3. The NdFeB alloy powder of according to claim 1 , wherein a thickness of the first metal layer is in the range of 1 to 50 nm claim 1 , in particular in the range of 5 to 30 nm.4. The NdFeB alloy powder of according to claim 2 , wherein a thickness of the first metal layer is in the range of 1 to 50 nm claim 2 , in particular in the range of 5 to 30 nm.5. The NdFeB alloy powder according to claim 1 , wherein a thickness of the second metal layer is in the range of 1 to 20 nm claim 1 , in particular in the range of 5 to 15 nm.6. The NdFeB alloy powder according to claim 2 , wherein a thickness of the second metal layer is in the range of 1 to 20 nm claim 2 , in particular in the range of 5 to 15 nm.7. The NdFeB alloy powder according to claim 3 , wherein a thickness of the second metal layer is in the ...

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Номер записи: 96
10-02-2022 дата публикации

METHODS FOR TAILORING MAGNETISM, AND STRUCTURES OBTAINED THEREFROM

Номер: US20220044870A1
Автор: CLOUGH Eric, HENRY Christopher, LAPLANT Darby, SCHAEDLER Tobias, SUCICH Amber, YAHATA Brennan
Принадлежит:

This invention provides methods for fabricating a hard or soft magnet with tailorable magnetic and crystallographic orientations. Methods are disclosed to individually tailor three-dimensional voxels for selected crystallographic orientations and, independently, selected magnetic orientations with location specificity throughout a magnet. Some variations provide a method of making a magnet, comprising: providing a feedstock composition containing magnetic or magnetically susceptible materials; exposing the feedstock composition to an energy source for melting, thereby generating a first melt layer; solidifying the first melt layer in the presence of an externally applied magnetic field, thereby generating a magnetic metal layer containing a plurality of individual voxels; optionally repeating to generate a plurality of solid layers; and recovering a magnet comprising the magnetic metal layer(s), wherein the externally applied magnetic field has a magnetic-field orientation that is selected to control a magnetic axis and a crystallographic texture within the magnetic metal layer(s). 1. A method of making a magnet with tailored magnetism , said method comprising:(a) providing a feedstock composition containing one or more magnetic or magnetically susceptible materials;(b) exposing a first amount of said feedstock composition to an energy source for melting in a scan direction, thereby generating a first melt layer;(c) solidifying said first melt layer in the presence of an externally applied magnetic field, thereby generating a magnetic metal layer containing a plurality of individual voxels;(d) optionally repeating steps (b) and (c) a plurality of times to generate a plurality of solid layers by sequentially solidifying a plurality of melt layers in a build direction, thereby generating a plurality of magnetic metal layers; and(e) recovering a magnet comprising said magnetic metal layer,wherein said externally applied magnetic field has a magnetic-field orientation, ...

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Номер записи: 97
24-01-2019 дата публикации

METHOD OF IMPROVING THE COERCIVITY OF ND-FE-B MAGNETS

Номер: US20190027306A1
Автор: Liu Guangyang, PENG Zhongjie, Xu Mingfeng, YANG Kunkun
Принадлежит:

A method of improving coercivity of an Nd—Fe—B magnet includes a first step of providing an Nd—Fe—B magnet having a first surface and a second surface. Next, a first solidified film of at least one pure heavy rare earth element is formed and attached to the first surface of the Nd—Fe—B magnet to prevent a reduction in corrosion resistance caused by oxygen and fluorine and hydrogen. After forming the first solidified film, the Nd—Fe—B magnet is subjected a diffusion treatment in a vacuum or an inert atmosphere. After the diffusion treatment, the Nd—Fe—B magnet is subjected to an aging treatment in the vacuum or the inert atmosphere. 1. A method of improving coercivity of an Nd—Fe—B magnet , said method comprising the steps of:providing an Nd—Fe—B magnet having a first surface and a second surface;forming a first solidified film of at least one pure heavy rare earth element attached to the first surface of the Nd—Fe—B magnet to prevent a reduction in corrosion resistance caused by oxygen and fluorine and hydrogen;subjecting the Nd—Fe—B magnet including the first solidified film to a diffusion treatment in a vacuum or an inert atmosphere; andsubjecting the Nd—Fe—B magnet including the first solidified film to an aging treatment in the vacuum or the inert atmosphere.2. The method as set forth in wherein said step of forming the first solidified film is defined as depositing a first layer of at least one pure heavy rare earth element powders selected from a group consisting of Dy claim 1 , Tb claim 1 , or an alloy of Dy and Tb attached to the first surface of the Nd—Fe—B magnet under an inert atmosphere.3. The method as set forth in wherein said step of depositing the first layer is defined as depositing the first layer under the inert atmosphere of Argon.4. The method as set forth in wherein said step of depositing the first layer is defined as depositing the first layer of at least one pure heavy rare earth element powders having a particle size of between 0.5 μm and ...

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Номер записи: 98
23-01-2020 дата публикации

METHOD OF INCREASING THE COERCIVITY OF A SINTERED ND-FE-B PERMANENT MAGNET

Номер: US20200027655A1
Автор: PENG Zhongjie, WANG Chuanshen, YANG Kunkun
Принадлежит:

A method of increasing coercivity of an Nd—Fe—B sintered permanent magnet includes a step of providing an organic film. A powder, containing at least one heavy rare earth elements, is uniformly deposited on the organic film forming a diffusion source. Then, a sintered Nd—Fe—B magnet block having a pair of block surfaces extending perpendicular to a magnetization direction is provided. Next, the diffusion source is deposited on at least one of the block surfaces with the powder being in abutment relationship with at least one of the block surfaces. After depositing the diffusion source, the sintered Nd—Fe—B magnet block containing the diffusion source is pressed allowing the powder of the diffusion source to be in close contact with the block surface. The diffusion source is then diffused into the sintered Nd—Fe—B magnet block to produce a diffused magnet block. Next, the diffused magnet block is aged. 1. A method of increasing coercivity of a sintered Nd—Fe—B permanent magnet , the method including the steps of:providing an organic film including a pair of opposing surfaces and having a thickness of between 5 μm and 50 μm;uniformly depositing, under an inert gas environment, a powder containing at least one heavy rare earth elements on at least one of the opposing surfaces of the organic film thereby forming a diffusion source;providing a sintered Nd—Fe—B magnet block having a pair of block surfaces, opposite and spaced from of one another, extending perpendicular to a magnetization direction;depositing the diffusion source on at least one of the block surface of the sintered Nd—Fe—B magnet block with the powder being in abutment relationship with at least one of the block surfaces;pressing the sintered Nd—Fe—B magnet block containing the diffusion source allowing the powder of the diffusion source to be in close contact with the at least one of the block surfaces of the sintered Nd—Fe—B magnet block;diffusing the diffusion source into the sintered Nd—Fe—B magnet ...

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Номер записи: 99
23-01-2020 дата публикации

GRAIN BOUNDARY DIFFUSION METHOD OF R-FE-B SERIES RARE EARTH SINTERED MAGNET, HRE DIFFUSION SOURCE AND PREPARATION METHOD THEREOF

Номер: US20200027656A1
Автор: Liao Zongbo, Lin Yulin, Nagata Hiroshi, XIE Juhua, YE Hanshen
Принадлежит:

The present invention discloses a grain boundary diffusion method of an R—Fe—B series rare earth sintered magnet, an HRE diffusion source, and a preparation method thereof, comprising the following steps: engineering A of forming a dry layer on a high-temperature-resistant carrier, the dry layer being adhered with HRE compound powder, the HRE being at least one of Dy, Tb, Gd, or Ho; and engineering B of performing heat treatment on the R—Fe—B series rare earth sintered magnet and the high-temperature-resistant carrier treated with the engineering A in a vacuum or inert atmosphere and supplying HRE to a surface of the R—Fe—B series rare earth sintered magnet. The method can reduce the consumption of heavy rare earth element and control the loss of residual magnetism Br while increasing the coercivity. 1. A grain boundary diffusion method of an R—Fe—B series rare earth sintered magnet , wherein the method comprises:forming a dry layer on a high-temperature-resistant carrier to yield a treated high-temperature-resistant carrier, the dry layer being adhered with heavy rare earth elements (HRE) compound powder, the HRE being at least one of Dy, Tb, Gd, or Ho; andperforming heat treatment on the R—Fe—B series rare earth sintered magnet and the treated high-temperature-resistant carrier in a vacuum or inert atmosphere and supplying HRE to a surface of the R—Fe—B series rare earth sintered magnet.2. The grain boundary diffusion method of the R—Fe—B series rare earth sintered magnet according to claim 1 , wherein atmospheric pressure of a treatment chamber in which the heat treatment is performed is below 0.05 MPa.3. The grain boundary diffusion method of the R—Fe—B series rare earth sintered magnet according to claim 1 , wherein while performing the heat treatment claim 1 , the dry layer adhered with the HRE compound powder formed on the high-temperature-resistant carrier and the R—Fe—B series rare earth sintered magnet are placed in a contact manner or in a non-contact ...

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