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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 27. Отображено 27.
18-08-2023 дата публикации

Drive test method, device and equipment and storage medium

Номер: CN116614837A
Автор: YANG FEIHU, LIU XIANSONG, OU DACHUN, LI YI, XU GUOPING, ZHANG ZHONGPING, LI HUILIAN, CHEN QINGQING, ZHANG SHUOWEI, CHEN MIN
Принадлежит:

The invention provides a drive test method, device and equipment and a storage medium, and relates to the technical field of communication, and the method comprises the steps: obtaining a measurement report (MR) data set; the MR data set comprises MR data of one or more user equipment in the to-be-evaluated area; acquiring a mobile user detail record XDR call ticket data set generated by a core network when one or more user equipment dials a VoLTE (Voice over Long Term Evolution) service; the XDR call ticket data set comprises XDR call tickets of one or more user equipment; and based on the MR data set and the XDR call ticket data set, performing drive test on the to-be-evaluated area to obtain a drive test result of the to-be-evaluated area. The method is suitable for a drive test process of an area. The problem that network problems cannot be comprehensively reflected is solved.

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Номер записи: 1
17-08-2011 дата публикации

Method for manufacturing high-density vanadium-nitrogen alloy

Номер: CN0101319282B
Автор: LIU ZHIZHI, LIU XIANSONG, ZHIZHI LIU, XIANSONG LIU
Принадлежит:

The invention provides a method for producing vanadium-nitrogen alloy. In the method, powdered vanadium oxide or ammonium metavanadate, carbon powder, bonding agents and density increasing agents are evenly mixed and are subjected to briquetting and forming; the mixture is continuously added in an external-heat type rotary kiln under the atmosphere of nitrogen gas and preheated up to the temperature of below 1,000 DEG C under the protection of the nitrogen gas, and at a discharge port, preheated massive products which are cooled down to the room temperature under the protection of nitrogen gas are collected; and the massive products are put in an improved soft magnetism nitrogen atmosphere kiln and heated up to the temperature of between 1,000 and 1,500 DEG C so as to make materials carryout the carbonization reaction and the nitriding reaction, and the vanadium-nitrogen alloy products are obtained after discharge. In the vanadium-nitrogen alloy obtained, the V content is between 78 and ...

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Номер записи: 2
10-12-2008 дата публикации

Method for manufacturing high-density vanadium-nitrogen alloy

Номер: CN0101319282A
Автор: LIU XIANSONG, LIU ZHIZHI, XIANSONG LIU, ZHIZHI LIU
Принадлежит:

The invention provides a method for producing vanadium-nitrogen alloy. In the method, powdered vanadium oxide or ammonium metavanadate, carbon powder, bonding agents and density increasing agents are evenly mixed and are subjected to briquetting and forming; the mixture is continuously added in an external-heat type rotary kiln under the atmosphere of nitrogen gas and preheated up to the temperature of below 1,000 DEG C under the protection of the nitrogen gas, and at a discharge port, preheated massive products which are cooled down to the room temperature under the protection of nitrogen gas are collected; and the massive products are put in an improved soft magnetism nitrogen atmosphere kiln and heated up to the temperature of between 1,000 and 1,500 DEG C so as to make materials carry out the carbonization reaction and the nitriding reaction, and the vanadium-nitrogen alloy products are obtained after discharge. In the vanadium-nitrogen alloy obtained, the V content is between 78 and ...

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Номер записи: 3
25-04-2023 дата публикации

Method, device and equipment for adjusting network bandwidth

Номер: CN116016191A
Автор: LI SHANSHAN, LIU XIANSONG, WANG HONGDING, QIU QIANLIN, CHEN LING, TU ZIHAO, LI RUILING, ZHU PENG, ZHONG CHENJIE, SHI XURONG
Принадлежит:

The invention provides a network bandwidth adjusting method, device and equipment. The method comprises the following steps: acquiring to-be-identified data of a target user; determining first feature data corresponding to the to-be-identified data according to the to-be-identified data; inputting the first feature data corresponding to the to-be-identified data into a preset prediction model to obtain predicted network traffic data; and adjusting the network bandwidth of the target user according to the predicted network flow data. The network flow data used by the user in a period of time is collected, the prediction model is obtained based on model training, the network flow data of the current user is predicted, and according to the prediction result, the network bandwidth is dynamically adjusted, the network smoothness is ensured, and the network service of the user is ensured.

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Номер записи: 4
23-06-2023 дата публикации

Abnormal traffic data determination method and device and readable storage medium

Номер: CN116319382A
Автор: YUN JUN, CHEN LING, LIU XIANSONG
Принадлежит:

The invention discloses a method and a device for determining abnormal traffic data and a readable storage medium, relates to the technical field of communication, and is used for improving the accuracy of determining the abnormal traffic data. The method comprises the following steps: acquiring traffic data of a target area in a historical time period; determining predicted traffic data of the target area in the target time period according to the traffic data in the historical time period and a trained traffic prediction model; the abnormal unit time of the target area is determined, the difference value between the traffic data in the abnormal unit time and the predicted traffic data is larger than a first threshold value, and the abnormal unit time is located in the target time period; and under the condition that the quantity of the abnormal unit time exceeds a second threshold value and is continuous, determining that the traffic data of the target area is abnormal traffic data.

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Номер записи: 5
13-06-2012 дата публикации

Calcium permanent magnetic ferrite material and preparation method thereof

Номер: CN0101786869B
Автор: CHENG CHUNHAO, HU FENG, JIA DAONING, LIU XIANSONG, QIU SHIXING, RUAN ZHENG, WANG PENGPENG, YIN PING, ZHOU DAN, ZHU DERU, CHUNHAO CHENG, FENG HU, DAONING JIA, XIANSONG LIU, SHIXING QIU, ZHENG RUAN, PENGPENG WANG, PING YIN, DAN ZHOU, DERU ZHU
Принадлежит:

The invention discloses a calcium permanent magnetic ferrite material and a preparation method thereof. The calcium permanent magnetic ferrite material belongs to the hexagonal crystal system and has the following chemical structural formula: R1-x-yCaxLay.nFe2-zCoz/nO3, wherein 0.01<=x<=0.4, 0.1<=y<=0.75, 0.07<=z<=0.82, 5.0<=n<=6.5, 0<=1-x-y<=0.5; R is one or two or three of Ba, Sr and total 16 lanthanide series chemical elements not containing La; and when R is Ba and Sr, the content of Ba and Sr is smaller than 0.2. Compared with the traditional permanent magnetic ferrite, the permanent magnetic ferrite material provided by the invention only contains a small quantity of Ba and Sr; and under the temperature of 1150 DEG C or lower sintering temperature, the value of residual magnetism Brcan reach 4200-4700Gs, and the value of intrinsic coercivity HJC reaches 4500-6200kOe. The calcium permanent magnetic ferrite of the invention has high residual magnetism and intrinsic coercivity, and can ...

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Номер записи: 6
07-04-2023 дата публикации

Network quality problem processing method and device, server and storage medium

Номер: CN115942351A
Автор: YANG FEIHU, LIU XIANSONG, OU DACHUN, XU GUOPING, ZHANG ZHONGPING, LI HUILIAN, LI YI, ZHOU JIEHUA, CHEN MIN, JIANG ZHIHENG
Принадлежит:

The invention provides a network quality problem processing method and apparatus, a server and a storage medium. The method comprises the steps of obtaining measurement data of a to-be-processed region; performing grid division on the to-be-processed area to obtain a first grid, and matching the first grid with the measurement data to obtain a second grid; performing position association on the second grid and vector information in the electronic map, and dividing the second grid into a road matching grid and a non-road matching grid according to the vector information; converging the road matching grids, belonging to the roads, of the to-be-evaluated area into closed-loop areas of the roads, and dividing the closed-loop areas of the roads to obtain grid sections; determining whether the grid road section corresponding to each road is a network quality problem road section; adopting a DBSCAN algorithm to cluster the network quality problem road sections to form a network quality problem ...

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Номер записи: 7
09-05-2023 дата публикации

Energy consumption index calculation task scheduling method and device, electronic equipment and medium

Номер: CN116089039A
Автор: MA XIANLONG, LIU XIANSONG, MA MINGZHI, TU ZIHAO
Принадлежит:

The invention provides an energy consumption index calculation task scheduling method and apparatus, an electronic device and a medium. The method comprises the steps of obtaining an energy consumption index calculation task of a data center; marking the calculation task of each energy consumption index and the servers in the cluster server; and for the calculation task of each energy consumption index, according to the label of the calculation task and the label of the server, distributing the calculation task of the energy consumption index to the corresponding server, so that the server processes the calculation task of the energy consumption index to obtain the energy consumption value of the energy consumption index. According to the scheme, the calculation efficiency of each energy consumption index of the data center can be improved.

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Номер записи: 8
18-04-2023 дата публикации

Training method of satisfaction degree prediction model, satisfaction degree prediction method and device

Номер: CN115982585A
Автор: SHE SHIZHAO, LIU XIANSONG, OU DACHUN, CHEN LING, LI XINYAN, HUANG ZHIXIONG, SHI XURONG, HUANG MING
Принадлежит:

The invention provides a training method of a satisfaction prediction model, and a satisfaction prediction method and device, relates to the field of data processing, and can effectively improve the accuracy of the satisfaction prediction model. The method comprises the steps of obtaining at least one user data sample, then deleting a first data sample from the at least one user data sample to obtain to-be-trained data, and finally updating parameters of an initial satisfaction prediction model according to the to-be-trained data to obtain a satisfaction prediction model. The embodiment of the invention is used in the training process of the satisfaction prediction model and the satisfaction prediction process.

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Номер записи: 9
23-07-2008 дата публикации

Method for producing vanadium-nitrogen alloy

Номер: CN0101225495A
Автор: LIU XIANSONG, LIU ZHIZHI, XIANSONG LIU, ZHIZHI LIU
Принадлежит:

The invention relates to a production method for vanadium-nitrogen alloy, which comprises following steps: evenly mixing oxide of powder vanadium or ammonium metavanadate, carbon powder and binder, continuously adding into an external-heating rotary kiln in nitrogen atmosphere after briquetting and forming, and presintering to below 1000 DEG C under the protection of nitrogen; collecting the presintered block product which is cooled to ambient temperature under the protection of nitrogen at a discharge opening, pushing into an improved soft magnetic nitrogen atmosphere furnace kiln, heating to 1000 to 1500 DEG C for carbonization and nitridation reaction, and vanadium-nitrogen alloy product is obtained after discharge. The composition of the vanadium-nitrogen alloy: V is 78 to 83%, N is 16 to 21%, C is 6% max, and silicon, phosphorus and aluminum are less than 0.10%; the apparent density is greater than 3.5g/cm<3>. The production method for vanadium-nitrogen alloy has the advantages of ...

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Номер записи: 10
14-04-2023 дата публикации

Impregnation liquid and application thereof as well as preparation method and application of magnetic powder core

Номер: CN115966360A
Автор: ZHANG CONG, LIU XIANSONG, KAN XUCAI, LI YUE, FENG SHUANGJIU, TIAN HAIMING, LIU WEIQI
Принадлежит:

The invention relates to the field of materials, and discloses an impregnation liquid and application thereof, and a preparation method and application of a magnetic powder core. The impregnation liquid comprises ferrite powder, epoxy resin, a curing agent, a dispersing agent and a diluent, the average particle size of the ferrite powder is 10-80 nm; on the basis of the total weight of the impregnation liquid, the content of the ferrite powder is 5-50 wt%, the content of the epoxy resin is 33-62.7 wt%, the content of the curing agent is 8-15.2 wt%, the content of the dispersing agent is 1-1.9 wt%, and the content of the diluent is 8-15.2 wt%. The prepared impregnation liquid is applied to preparation of a magnetic powder core and/or a magnetic device. The method for preparing the magnetic powder core comprises the steps that the magnetic powder core is soaked in impregnation liquid and then cured. The prepared magnetic powder core is applied to an inductor and/or a transformer. The impregnation ...

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Номер записи: 11
03-12-2008 дата публикации

Vanadium-nitrogen alloy

Номер: CN0101314830A
Автор: LIU XIANSONG, XIANSONG LIU
Принадлежит:

The invention discloses a vanadium-nitrogen alloy, which comprises the components by weight percentage as follows: vanadium is 85 to 90 percent, coke is 8 to 10 percent, and polyvinyl alcohol is 2 to 5 percent. Firstly, the materials are selected, mixed and stirred according to the proportion; secondly, the mixture materials are pressed into precast blocks in a molding press; finally, the precast blocks are put in gland box which is put in a kiln for calcination, and products are cooled, tested and packed after being taken out of the kiln. The vanadium-nitrogen alloy improves the tensile strength and the temper of rolled steels, and lightens the weight of the rolled steels.

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Номер записи: 12
27-06-2023 дата публикации

Flexible samarium-iron-nitrogen magnetic material as well as preparation method and application thereof

Номер: CN116344140A
Автор: KAN XUCAI, LI YUE, ZHANG CONG, TIAN MINGLIANG, XI LEI, ZHU YONG, LIU XIANSONG, FENG SHUANGJIU
Принадлежит:

The invention relates to the technical field of magnetic materials, and discloses a flexible samarium-iron-nitrogen magnetic material and a preparation method and application thereof.The flexible samarium-iron-nitrogen magnetic material comprises a flexible samarium-iron-nitrogen magnet base body and an outer coating layer, and the outer coating layer is a rubber layer containing ferrite magnetic powder. According to the samarium-iron-nitrogen magnetic material, the component proportion is improved, and the ferrite magnetic powder is introduced on the basis of a magnetic coupling mechanism, so that the flexibility, the magnetic performance, the oxidation resistance and the corrosion resistance of the samarium-iron-nitrogen magnetic material can be greatly improved; therefore, the flexible samarium-iron-nitrogen magnetic material which is long in service life, high in size precision and large in form freedom degree and meets the application requirements of the fields of space flight and ...

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Номер записи: 13
23-05-2023 дата публикации

Traffic monitoring method and device and storage medium

Номер: CN116156504A
Автор: ZHANG SHUOWEI, LIU XIANSONG, OU DACHUN, CHEN LING, TU ZIHAO, CAO BIN, TAO YING, SHE SHIZHAO
Принадлежит:

The invention discloses a traffic monitoring method and device and a storage medium, relates to the field of communication, and is used for simply and accurately monitoring port traffic. The method comprises the following steps: acquiring first historical traffic data of a target port; the first historical traffic data is traffic data of the target port in a first preset time period before the current moment; inputting the first historical traffic data into a preset model, and determining a dynamic threshold value of the target port in the first time period, the dynamic threshold value comprising a plurality of threshold values; a plurality of moments in the first time period respectively correspond to a plurality of threshold values; and determining whether the traffic of the target port in the first time period is abnormal or not according to the traffic data of the target port in the first time period and the dynamic threshold value. The method and the device are used in a flow monitoring ...

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Номер записи: 14
08-12-2010 дата публикации

High magnetic conductivity and low loss factor manganese-zinc ferrite material and manufacture process thereof

Номер: CN0101905970A
Автор: XIANSONG LIU, JIE XU, FENG HU, DERU ZHU, LIU XIANSONG, XU JIE, HU FENG, ZHU DERU
Принадлежит:

The invention discloses a high magnetic conductivity and low loss factor manganese-zinc ferrite material and a manufacture process thereof. The high magnetic conductivity and low loss factor manganese-zinc ferrite material mainly comprises the main components in percent by mole (calculated by oxide) of 51-56 mol percent of Fe2O3, 22-29 percent of MnO and 20-25 mol percent of ZnO and the auxiliarymaterials including P2O5, CaO, SiO2, Bi2O3 and the like. The manganese-zinc ferrite material with high magnetic conductivity, low magnetic conductivity temperature factor and low relevant loss factoris prepared by the steps of mixing, pre-roasting, sanding, pelleting, forming and sintering. The invention has the advantages of simple and proper formulation and advanced and reasonable manufacture process. The prepared manganese-zinc ferrite material has property exceeding CL11F-brand property and superior to the H5C2-brand material property of a TDK company in Japan.

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Номер записи: 15
12-05-2023 дата публикации

Anti-rust paint capable of improving inductance value and heat-conducting property, application of anti-rust paint and preparation method of inductor

Номер: CN116102909A
Автор: ZHANG CONG, LIU XIANSONG, KAN XUCAI, LI YUE, FENG SHUANGJIU, TIAN HAIMING
Принадлежит:

The invention relates to the field of chemical coatings, and discloses an anti-rust paint capable of improving inductance value and heat-conducting property, an application of the anti-rust paint and a preparation method of an inductor. The antirust paint comprises ferrite powder, epoxy resin, a thickening agent, a curing agent, a diluent and a dispersing agent, based on the total weight of the antirust paint, the content of the ferrite powder is 5-60 wt%, the content of the epoxy resin and the curing agent is 34-93.5 wt%, the content of the thickening agent is 0.1-2 wt%, the content of the diluent is 1.3-3 wt%, and the content of the dispersant is 0.1-1 wt%. The mass ratio of the epoxy resin to the curing agent is (3-4): 1. The method for preparing the inductor comprises the following steps: spraying the antirust paint on the surface of the inductor, and then carrying out curing treatment. The antirust paint provided by the invention is high in stability, and the inductance value and the ...

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Номер записи: 16
27-06-2023 дата публикации

Flexible samarium-iron-nitrogen magnet and preparation method and application thereof

Номер: CN116344141A
Автор: KAN XUCAI, MENG QINGYANG, LI YUE, ZHANG CONG, TIAN MINGLIANG, LIU XIANSONG, FENG SHUANGJIU
Принадлежит:

The invention relates to the technical field of magnetic materials, and discloses a flexible samarium-iron-nitrogen magnet and a preparation method and application thereof, and the flexible samarium-iron-nitrogen magnet comprises a flexible samarium-iron-nitrogen magnet matrix and a rubber layer which coats the surface of the flexible samarium-iron-nitrogen magnet matrix and has oxidation resistance. According to the preparation method, the rubber coating technology and the anti-oxidation treatment are adopted, and the preparation processes of element doping and the like are improved on the magnetic powder, so that the phenomenon that the magnetic powder falls off is greatly improved, and the magnetic performance and the anti-oxidation capacity of the magnetic powder are improved; the prepared samarium-iron-nitrogen magnet has excellent magnetic performance and oxidation resistance while meeting the requirement of a flexible material, also has the advantages of high dimensional precision ...

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Номер записи: 17
08-08-2023 дата публикации

High-speed rail user identification method and device and storage medium

Номер: CN116567672A
Автор: YANG FEIHU, LIU XIANSONG, OU DACHUN, JIANG ZHIHENG, YI FENG, ZHAO NANJIANG, XU JINGJING, ZHANG ZHONGPING, YIN JINSONG, ZENG YI
Принадлежит:

The invention provides a high-speed rail user identification method and device and a storage medium, relates to the field of communication, and can efficiently and accurately identify high-speed rail users. The method comprises the following steps: determining a high-speed rail master control cell; wherein the high-speed rail master control cell is used for providing services for the high-speed rail user group; determining a first model according to the fingerprint features of the high-speed rail master control cell; wherein the first model is used for determining the confidence coefficient of the high-speed rail master control cell; determining a first target service cell according to the confidence of the high-speed rail master control cell; the first target serving cell is a serving cell of which the confidence is greater than a preset confidence threshold in high-speed rail master control cells; determining a second model according to the first target service cell; wherein the second ...

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Номер записи: 18
06-06-2023 дата публикации

Acupuncture needle warming and waking box

Номер: CN116211484A
Автор: LIU XIANSONG, HUANG YANJUN, LIU JIAXIN, SHI CHENGZHI, WANG XIAOLI
Принадлежит:

The invention discloses an acupuncture needle warming and waking box which comprises a needle distributing box and a disinfecting and killing base. The needle distributing box comprises a needle storage body, a needle arranging core rod and an elastic reset assembly, a needle arranging cavity and a mounting cavity are coaxially formed in the needle storage body in sequence from front to back, and the needle arranging cavity is communicated with the mounting cavity; four V-shaped needle storage cavities which are arranged along the axial direction are uniformly arranged in the needle body around the needle arranging cavity along the circumference; an input hole which backwards penetrates through the needle storage body is formed in the rear groove wall at the upper part of each needle storage cavity along the axial direction; the acupuncture needle warming and waking device is unique in structure, the multiple needle storage cavities are formed in the circumference and used for storing acupuncture ...

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Номер записи: 19
06-08-2014 дата публикации

High-performance permanent magnet ferrite material and preparing method thereof

Номер: CN103964828A
Автор: LIU XIANSONG, HUANG FENG, LYU FARUI, GAO SHANG, MA YUQI, HUANG XIN, FENG SHUANGJIU, ZHANG ZHANJUN, NIU XIAOFEI
Принадлежит:

The invention relates to a high-performance permanent magnet ferrite material and a preparing method thereof and belongs to the technical field of magnetic function material preparation. The invention adopts the technical scheme as follows: carrying out preparation according to a main phase molecular formula Sr1-xBaxO.nFe(12-y)/nRy/nO3, wherein x is not smaller than 0 and not bigger than 0.998, n is not smaller than 5.75 and not bigger than 6.15, y is bigger than 0 and not bigger than 0.6, R refers to Cr or Cr and Al, and the content of Cr and Al is smaller than or equal to 0.6 when R refers to Cr and Al; secondarily adding one or more than two of industrial-purity CeO2, Ga2O3 and MoO3. The rest magnetism Br value of the high-performance permanent magnet ferrite prepared by the method is larger than or equal to 390mT, the intrinsic coercivity Hcj value is larger than or equal to 346.1kA/m, and the magnetic energy product (BH)max value is larger than or equal to 28.7kJ/m<3>. The method has ...

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Номер записи: 20
23-11-2011 дата публикации

Rare earth permanent ferrite material and preparation method thereof

Номер: CN0102249658A
Автор: XIANSONG LIU, PING YIN, SHUANGJIU FENG, LIU XIANSONG, YIN PING, FENG SHUANGJIU
Принадлежит:

The invention discloses a rare earth permanent ferrite material and a preparation method for devices made of same. The rare earth substituted permanent ferrite material has a hexagonal system, and has the chemical structural formula of A1-xRx.nFe2-y-zLnz/nCoy/nO3, wherein x is more than or equal to 0 and less than or equal to 0.8; y is more than or equal to 0 and less than or equal to 2.0; z is more than or equal to 0 and less than or equal to 3.0; n is more than or equal to 5.0 and less than or equal to 6.1; (1-x) is more than or equal to 0.2 and less than or equal to 1.0; A is one, two or three of Ca, Ba and Sr; R is one, two or three of chemical elements of La, Ce, Pr and Nd; and Ln is one, two or three of Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu. Compared with the traditional permanent ferrite (AB12O19), the permanent ferrite material has the advantages that: the La, Ce, Pr and Nd in lanthanide rare earth partially replace ions at a position A, and the Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and ...

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Номер записи: 21
28-04-2023 дата публикации

Map resource loading method and device, equipment and storage medium

Номер: CN116028744A
Автор: LIU BINGHUI, LIU XIANSONG, OU DACHUN
Принадлежит:

The invention discloses a map resource loading method and device, equipment and a storage medium, relates to the technical field of communication, and is used for improving the efficiency of loading map resources. The method comprises the steps that a target JS file is created in a target system, a first method and a second method are created in the target JS file, the target system is used for displaying a target map through a target page, the first method is used for adding JS resources in the target page, and the second method is used for adding CSS resources in the target page; a first promise is newly built in the first method, and a second promise is newly built in the second method; importing a first method and a second method into the target component, and converting the first method and the second method into a synchronous calling method based on a preset grammar; and loading the JS resource through the first method, and loading the CSS resource through the second method, so as ...

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Номер записи: 22
16-05-2023 дата публикации

Magnetic material with magnetization reversal phenomenon and preparation method and application thereof

Номер: CN116120065A
Автор: LIU WEIQI, LIU XIANSONG, KAN XUCAI, FENG SHUANGJIU, ZHANG CONG
Принадлежит:

The invention relates to the field of materials, and discloses a magnetic material with a magnetization reversal phenomenon and a preparation method and application thereof. The chemical formula of the magnetic material is LaFexCr1-xO3, wherein x is more than or equal to 0.45 and less than or equal to 0.5. The preparation method of the magnetic material comprises the steps that after La2O3, Fe2O3 and Cr2O3 are mixed, a solvent is added, first grinding, drying and pre-sintering are carried out, second grinding, tabletting and sintering are carried out, and the molar ratio of La2O3 to Fe2O3 to Cr2O3 is 1: (0.45-0.5): (0.55-0.5). According to the magnetic material, magnetization reversal occurs under the change of the external magnetic field intensity, and the magnetization intensity stably changes between positive and negative. The magnetic material is simple in preparation process and low in cost.

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Номер записи: 23
04-02-2004 дата публикации

柠檬酸络合制备M-型铁氧体纳米微粒的方法

Номер: CN0001472166A
Автор: ZHONG WEI, LIU XIANSONG, DU YOUWEI, WEI ZHONG, XIANSONG LIU, YOUWEI DU, 钟 伟
Принадлежит:

A process for preparing M-type ferrite nanoparticles by complexing citric acid uses iron nitrate, barium carbonate, strontium carbonate, citric acid and/or glycol, and includes such steps as depositing iron nitrate to obtain Fe(OH)3, repeatedly washing, sol-gel treating, and high-temp (700-1100 deg.C) calcining.

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Номер записи: 24
28-07-2010 дата публикации

Calcium permanent magnetic ferrite material and preparation method thereof

Номер: CN0101786869A
Автор: CHENG CHUNHAO, HU FENG, JIA DAONING, LIU XIANSONG, QIU SHIXING, RUAN ZHENG, WANG PENGPENG, YIN PING, ZHOU DAN, ZHU DERU, CHUNHAO CHENG, FENG HU, DAONING JIA, XIANSONG LIU, SHIXING QIU, ZHENG RUAN, PENGPENG WANG, PING YIN, DAN ZHOU, DERU ZHU
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The invention discloses a calcium permanent magnetic ferrite material and a preparation method thereof. The calcium permanent magnetic ferrite material belongs to the hexagonal crystal system and has the following chemical structural formula: R1-x-yCaxLay.nFe2-zCoz/nO3, wherein 0.01<=x<=0.4, 0.1<=y<=0.75, 0.07<=z<=0.82, 5.0<=n<=6.5, 0<=1-x-y<=0.5; R is one or two or three of Ba, Sr and total 16 lanthanide series chemical elements not containing La; and when R is Ba and Sr, the content of Ba and Sr is smaller than 0.2. Compared with the traditional permanent magnetic ferrite, the permanent magnetic ferrite material provided by the invention only contains a small quantity of Ba and Sr; and under the temperature of 1150 DEG C or lower sintering temperature, the value of residual magnetism Br can reach 4200-4700Gs, and the value of intrinsic coercivity HJC reaches 4500-6200kOe. The calcium permanent magnetic ferrite of the invention has high residual magnetism and intrinsic coercivity, and ...

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Номер записи: 25
14-01-2009 дата публикации

Nitrogen protection full-automatic double-rail ejection plate kiln

Номер: CN0101344358A
Автор: LIU XIANSONG, CHEN WEN, XIANSONG LIU, WEN CHEN
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The invention discloses a nitrogen protection full automatic double-track push board kiln, a feeder (1) is arranged at a feed inlet of the kiln (2), a pusher (3) is arranged at a discharge outlet of the kiln (2), a material preparation cooler (4) is arranged between the feeder (1) and the pusher (3); the feeder (1), the kiln (2), the pusher (3) and the material preparation cooler (4) are overall arranged into a shape of a big hollow square internally provided with a small hollow square on a machine rack (20); a kiln body (7) is divided into a material drying section (11), a calcination section (12) and a cooling section (13); two tracks (8) are arranged at the bottom of the kiln in the kiln body (7), groups of heating rods (9) are arranged on the wall of the kiln in the kiln body (7); a supporting plate (14) is arranged on the machine rack (20), the two tracks (15) are arranged on the supporting plate (14), and the tracks (8, 15) are composed of rollers (10) by arrangement. The double-track ...

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Номер записи: 26
08-04-2015 дата публикации

High magnetic-energy-product M type calcium series permanent magnetic ferrite material and preparation method thereof

Номер: CN104496443A
Автор: LIU XIANSONG, GAO SHANG, HUANG FENG, JIN DALI, FENG SHUANGJIU, ZHANG ZHANJUN
Принадлежит:

The invention discloses a high magnetic-energy-product M type calcium series permanent magnetic ferrite material and a preparation method thereof. The high magnetic-energy-product M type calcium series permanent magnetic ferrite material is a hexagonal crystal system, and the chemical structural formula is R1-x-yCaxLayO.nFe(12-z)/nCoz/nO3, wherein x is greater than or equal to 0.001 and smaller than or equal to 0.4, y is greater than or equal to 0.001 and smaller than or equal to 0.5, z is greater than or equal to 0.01 and smaller than or equal to 2.0, 1-x-y is greater than 0.2 and smaller than or equal to 0.998, n is greater than or equal to 5.0 and smaller than or equal to 6.5. R is Sr or adopts Sr as the main component, and also contains one, two or three of Ba, lanthanide series Ce, Pr, La, Nd and Sm. When R is Sr and Ba, the content of Sr and Ba is less than or equal to 0.998. In addition to high residual magnetism and intrinsic coercivity, the high magnetic-energy-product M type calcium ...

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Номер записи: 27