Patent RU2019123926A3

КЕРАМИЧЕСКОЕ ИЗДЕЛИЕ С ОРИЕНТИРОВАННЫМИ ЧАСТИЦАМИ И СПОСОБ ЕГО ПОЛУЧЕНИЯ

Способ формования керамических изделий

Production of shaped bodies for construction of light metal castings, used in production of Al strands (sic) through ceramic nozzles, ingot mold rings, intermediate tubes, sleeves (sic) and/or heating head rings

Production of shaped bodies for construction of light metal castings, especially casting nozzles (sic), ingot mold rings, intermediate tubes, sleeves (sic) and/or heating head rings (sic) involving:preparation and mixing of starting materials, filling the mold with starting materials, freezing (sic) of the mold, removal of the shaped body, thawing and drying of the shaped body. Independent claims are included for (a) a finely porous ceramic body for use in construction of the casting equipment having pores of diameter 4-6 mu m; (b) a shaped body of preferred porosity 55-62%.

VERFAHREN ZUR HERSTELLUNG EINES KERAMISCHEN GEGENSTANDES MIT ZWEI SEPARATEN KOMPONENTEN, DIE ANEINANDER BEFESTIGT SIND

Process and device of forming of elements out of concrete or mortar.

VERFAHREN ZUR HERSTELLUNG VON BAUPLATTEN AUS EINEM HYDRAULISCHEN BINDEMITTEL

PROCEDURE FOR THE PRODUCTION OF A MUFFEL FOR FEINODER MODEL CASTING AS WELL AS COMPOSITION TO THEIR PRODUCTION

PRODUCTION OF FIREPROOF ARTICLES BY A FREEZING CASTING PROCESS

PROCEDURE FOR FORMING INORGANIC POWDERS BY FREEZING AND PRESSING.

PROCESS AND DEVICE FOR SHAPING COMPONENTS MADE OF CONCRETE OR MORTAR

FROZEN SHAPED CONCRETE AND CLAYS

In a method and composition for manufacturing the products that made of cement, concrete and clay materials, it is known to freeze the materials before removing them from their molds. The freezing action is providing temporary hardness for the mixture of the materials to be protected against deforming during its removal from the mold. For protecting the properties of the composition in subfreezing temperatures and during the setting time in the freezer, use of additives product such as PolarSet is allowed. PolarSet allows the continuum chemical reaction within the frozen mixture while been kept in the freezer for hours in the early stage of hardening.

METHOD FOR PRODUCTION OF POROUS CERAMIC MATERIAL

The present invention provides a method of producing a porous ceramics material, which rapidly leads formation of a tissue, for example, bone tissue and has a practical strength. A method of producing a porous ceramics material 11, including step (A): a step of preparing a slurry 21 by dispersing a ceramics raw material in a medium, step (B): a step of filling the slurry 21 in a container 31, and inserting the container 31 in a given direction into a cooling medium 41 having a temperature not higher than the freezing point of the slurry 21 such that the slurry freezes unidirectionally from one end side, step (C): a step of drying the frozen slurry 21 to give a green body, and step (D): a step of firing the green body.

CERAMIC PRODUCTS

A method of producing a ceramic product comprising the steps of preparing an aqueous slurry of a silica sol with a refrac-tile material comprising a calcium or zirconium silicate, causing the slurry to gel by physical or chemical means to form a solid structure, and drying said structure to form a porous ceramic product. The product has a high green strength which nevertheless increases on heating, and may be used in building applications.

Herbst bremer goldschlaegerei

Manufactoring process of ceramic articles and installation for its implementation

PRINCIPE D'EMBOUTISSAGE DU BETON PAR CONGELATION

L'emboutissage du béton ou du mortier est réalisé en faisant pénétrer une forme ou matrice réfrigérée dans du béton ou mortier frais sortant du malaxage. La pénétration des formes ou matrices dans le béton est obtenue par pression et vibration. Au contact de ces formes ou matrices réfrigérées, l'eau du béton se solidifie et le béton devient solide. Après cette solidification, les formes ou matrices peuvent être retirées. La profondeur de l'emboutissage peut varier en fonction : a) de l'épaisseur du béton; b) du volume des formes et matrices. Ce procédé permet d'obtenir des éléments en béton ou mortier de formes diverses avec une cadence de production très élevée. De plus, elle apporte dans certains cas un allégement important en conservant aux pièces des résistances suffisantes.

REFRACTORY SHAPED CERAMIC BODIES, IN PARTICULAR FIRING AUXILIARIES, AND PROCESS FOR THE PRODUCTION THEREOF

A process for producing refractory shaped ceramic bodies comprising at least 60% by volume of mullite, based on the total mass of the refractory shaped ceramic body, which has the following steps: - provision or production of a freezing-sensitive and flowable slip consisting of or comprising water and (i) mullite particles, (ii) colloidally dispersed silicon dioxide particles and preferably (iii) aluminium oxide particles and optionally comprising (iv) further ceramic constituents and/or (v) further nonceramic constituents, - provision of a casting mould, - introduction of the slip into the casting mould, - freezing of the slip in the casting mould so as to form an intermediate body, - drying of the intermediate body and - sintering of the dried intermediate body in such a way that silicon dioxide particles are entirely or partly reacted to form mullite and the refractory shaped ceramic body, is described. Corresponding shaped bodies and their use as firing auxiliaries are also described ...

Process for the production of a muffle for investment casing or modell casting and composition of such a muffle

ПЛОТНЫЙ СПЕЧЕННЫЙ ПРОДУКТ

FIELD: ceramics production. SUBSTANCE: invention relates to a sintered product with the width of more than 50 mm, relative density of more than 90%, consisting of more than 80% of the volume of ceramic plates laid on top of each other in the horizontal position, where the set of the specified plates has the average thickness of less than 3 mcm, and containing more than 20% of aluminum oxide per the product mass. The product has crack resistance of more than 3.5 MPa·m 1/2 and impact toughness of more than 8 MPa· 1/2 . The product is obtained from slip containing a set of ceramic particles dispersed in a liquid phase, while the first fraction of particles in the form of plates with the length of more than 1 mcm is more than 80 vol.% of ceramic particles in the slip composition. The second fraction is more than 1 vol.% of ceramic particles, while the second fraction of particles has the median length of less than 1 mcm, and the median length of particles of the second fraction is at least 10 times less than the median length of particles of the first fraction. Slip is frozen, ice crystals are removed, an intermediate product is molded by pressing and sintered using pressure of more than 0.5 MPa. The product is used in turbines, in the composition of armor or a shielding element, a wear-resistant part or coating, a molding tool and similar products. EFFECT: creating the structure of ceramic material eliminating brittle properties of the product. 38 cl, 9 dwg, 5 tbl

Patent RU2016148404A3

VERFAHREN ZUR HERSTELLUNG VON KERAMISCHEN FORMKOERPERN DURCH GEFRIEREN WAESSRIGER SCHLICKER

A process for the production of high-density ceramic castings, in which an aqueous slip having a viscosity of 5 to 500 mPa.s is produced from a ceramic or metal powder, water and, if desired, dispersants, binders, a source of carbon and/or sintering aids, the slip is poured into a mould and frozen therein within not more than 90 seconds, and the frozen casting is removed from the mould, dried and sintered. Formation of dendritic ice crystals which impair the strength characteristics of the castings is prevented by a high rate of cooling without the need to add nuclei-forming additives.

SCHLICKERSPRITZGIESSVERFAHREN AND DEVICE FOR THE EXECUTION OF THE PROCEDURE

AQUEOUS GELCASTING METHOD FOR CERAMIC PRODUCTS

The present disclosure relates to the manufacture of ceramic products by aqueous gelcasting. Exemplary ceramic products include sanitary ware, such as toilets and sinks. The process includes a slurrying step, a mixing step, a molding step involving aqueous gelcasting, a drying step, a glazing step, and a firing step.

FUNCTION-ORIENTED PRODUCT.

Procédé comportant les étapes suivantes : - préparation d'une barbotine comportant plus de 4% et moins de 50% de particules céramiques et comportant plus de 1% de particules céramiques orientables en un matériau à fonction orientée, en pourcentage volumique sur la base de l'ensemble des particules céramiques, la fraction des particules céramiques non orientables présentant une longueur médiane inférieure à dix fois la longueur médiane des particules céramiques orientables L50 si l'ensemble de particules céramiques comporte moins de 80%, en pourcentage volumique, de particules céramiques orientables, - congélation orientée de la barbotine par déplacement d'un front de solidification à une vitesse inférieure à la vitesse d'encapsulation des particules céramiques; - élimination des cristaux de phase liquide solidifiée dudit bloc, - optionnellement, frittage.

CERAMIC POROUS BODY WITH COMMUNICATION MACROPORES AND PROCESS FOR PRODUCING THE CERAMIC POROUS BODY

This invention provides a process for producing a ceramic porous body having a high porosity and with communication marcopores. The process comprises mixing a ceramic powder with an aqueous solution of a water soluble polymer having a gelling ability to prepare a slurry, allowing the slurry to gel to once fix the structure, then freezing the gel to produce a crystal of ice in the gel structure to form a structure with communication pores, replacing water produced upon melting of ice by an atmosphere control replacement-type drying method to conduct drying without breaking, and sintering the dried product to form a ceramic porous body having various porosities, pore diameters, and pore shapes. The above process can eliminate the drawback of the prior art technique that, when the solid content of the slurry is less than 20% by volume, cracking or shrinkage is likely to occur during drying. Specifically, the above process can suppress the above unfavorable phenomenon even when the solid content ...

Ceramic Molded Product and Manufacturing Method Thereof

A method of manufacturing a ceramic molded product includes adding a binder mainly comprising a saccharide and water to a powder of ceramics such as silicon carbide and stirring the same to form an aqueous sludge having a fluidity, casting the sludge into an elastic die, molding the sludge while applying vibrations in a negative pressure state, solidifying the sludge by putting the die in which the sludge is cast to a temperature below freezing point for freeze-drying, and to a temperature where the binder is not frozen completely, then thawing the sludge in the negative pressure state and subliming and evaporating the water content in the binder, taking the molded product solidified in the die out of the die, further dewatering the demolded product by elevating the temperature to a temperature where the saccharide in the binder is dissolved, and then sintering the molded product.

СПОСОБ ИЗГОТОВЛЕНИЯ ЗАГОТОВОК И УСТРОЙСТВО ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ

FIELD: methods and devices for production of raw billets based on slip or thick pasty mass. SUBSTANCE: mass is introduced under pressure into mold cooled to below O C. After freezing, billet is removed and subjected to further working. Mold and movable part of power cylinder which closing the mold are located in sealed casing. Supplied to internal hollow of casing is dry gas with dew point below mold working temperature. Trough or box transfers raw billet from casing outlet hole to receiver found beyond the casing limits. Supply of dry gas prevents deposition of ice on planes of mold joints. Casing provides for maintenance of gas dew point below mold temperature. The method provides for production of billets with high density and mechanical characteristics. EFFECT: higher efficiency. 30 cl, 11 dwg 9 стс ПЧ ГЭ РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) (51) МПК ВИ” 2 133 654. 13) Сл В 22 Е 3/22 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 94016387/02, 13.05.1994 (30) Приоритет: 24.05.1993 ЕК 9306129 (46) Дата публикации: 27.07.1999 (56) Ссылки: МО 8807902 А2, 20.10.88. ММО 8807903 А2, 20.10.88. ЕР 0160855 А, 13.11.85. ОЕ 3917334 АЛ, 06.12.90. ОЕ 4033952 СЛ, 21.05.92. 5Ц 946986 А, 30.07.82. КЦ 2030969 СЛ, 20.03.95. (98) Адрес для переписки: 129010, Москва, ул.Б.Спасская, д.25 стр.3, ООО "Союзпатент", Патентному поверенному Емельянову Е.И. (71) Заявитель: Импак Текноложи (ЕК) (72) Изобретатель: Клод Кишо (ЕК), Пьер Ги Пейтавен (ЕК), Франсуа Давид (ЕК) (73) Патентообладатель: Импак Текноложи (ЕК) (54) СПОСОБ ИЗГОТОВЛЕНИЯ ЗАГОТОВОК И УСТРОЙСТВО ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ (57) Реферат: Способ и устройство касаются получения на основе шликера или густой тестообразной массы сырых заготовок. Упомянутая масса под давлением вводится в литейную форму, охлажденную до температуры ниже 0°С. После замораживания заготовка извлекается и подвергается дальнейшей обработке. Литейная форма и подвижные части силового цилиндра, который — обеспечивает ...

Verfahren zur Herstellung von Keramiken mit variierender Porenstruktur

Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines Keramikkörpers, der aus zwei monolithisch miteinander verbundenen Zonen, die sich hinsichtlich ihrer Porenstruktur unterscheiden, aufgebaut ist. Das erfindungsgemäße Verfahren beruht insbesondere auf der Kombination von Gefriergießen (Freeze Casting) und Schlickergußverfahren.

Method for vacuum freeze drying e.g. ceramic workpieces immediately after molding

Plastic (especially ceramic) workpieces are dried, immediately after molding, by deep freezing at reduced pressure for a time dependent on material and workpiece properties and then subjected to residual drying. An Independent claim is also included for apparatus for carrying out the above process, the apparatus comprising a vacuum chamber (3), which immediately follows a molding apparatus (1), and a residual drying unit (8). Preferred Features: The reduced pressure is 0.5-0.1 mbar. Residual drying is carried out in a hot air or air dryer, a vacuum dryer or a freeze dryer.

PROCEDURE FOR THE PRODUCTION OF ASSEMBLY FIXTURES FROM A HYDRAULIC BONDING AGENT

Cement board mfr. - involves mixing powdered ice or snow with a hydraulic binder

Castable refractory material

A castable refractory material for use in the manufacture of refractory products including fused silica, ceramic fiber, microsilica and a bonding material comprising colloidal silica.

ПЛОТНЫЙ СПЕЧЕННЫЙ ПРОДУКТ

Freeze injection moulding

For freeze injection moulding of components, a dispersion is used of a liq. dispersion agent and at least one inorganic non-metal and/or metal component to be injected into a mould, and then frozen. A gas is dissolved in the dispersion agent to reduce the freezing pt. and enhance the injection quality. Before injection, the dispersion is chilled to its freezing pt. without gas. The freezing is achieved through at least partial relaxation of the gas. Also claimed is an appts. with a cooling unit (5) at the dispersion feed (1), to reduce the dispersion temp. below its freezing pt. if no gas were present.

Improvements in or relating to the manufacture of ceramic bodies

... 664,082. Injection moulding ceramic materials. PROJECTILE & ENGINEERING CO., Ltd. July 5, 1950 [April 20, 1949], No. 10530/49. Class 87(ii) A stiff ceramic mix at normal temperature is injected into a mould which is at a temperature low enough to freeze the mix in the mould. When the moulded mix has become hard enough, it is removed from the mould. The mouldings are allowed to stand until the liquid in the mix has evaporated and are subsequently fired. The mix is fed by a plunger, Fig. 2, (not shown), from a hopper 15 through a duct 16 into the injection cylinder 12 from which it is forced into the mould by a hydraulic ram 13. The mould comprises a fixed mould block 23 with a female mould 24 and a toggle-operated mould block 25 having a male mould 26. Cooling fluid is circulated through pipes 28, 27, 30, 29 and 31. A layer of insulation 32 is provided between the block 23 and the machine frame. A thermostatic control may be provided to control the temperature of the moulds. The mix contains ...

Freeze Cast Components

Freeze-cast components

CERAMIC PRODUCTS

PROCEDURE FOR THE PRODUCTION OF ASSEMBLY FIXTURES FROM A HYDRAULIC BONDING AGENT

PROCESS AND DEVICE FOR SHAPING COMPONENTS MADE OF CONCRETE OR MORTAR

PREPARING REFRACTORY ARTICLES BY A FREEZECAST PROCESS

Refractory articles are prepared by a freezecast process where a ceramic fiber mat is saturated with a colloidal silica aqueous suspension, frozen and then heated to produce a preform. The preform is then saturated with a colloidal silica aqueous suspension, frozen, and then heated to produce a refractory article having silica particles substantially uniformly distributed throughout. The density of the refractory article can be increased by compression of the saturated mat prior to freezing.

MANUFACTURING OF SINTERED CERAMIC MOULDED BODIES

For manufacturing sintered ceramic moulded bodies and particularly moulded bodies of abrasive material including an abrasive material with relatively coarse grains such as corundum or carborundum, an aqueous mixture of raw material in question is cast into a mould for example of rubber, and withdrawn from the mould. The cooled moulded mixture is subjected to a freeze-drying process before it is fired. A particularly convenient mixture for a moulded body of abrasive material is a mixture comprised of (with respect to the dry mixture) about 70% by weight of refined corundum of which the grain size varies between 50 and 280 mesh, and of a base substance consisting substantially of pulverulent alpha-aluminium oxide with addition of potash feldspar, zirconium silicate and dextrine, and having a sintering temperature of 1770oC (2043oK).

Composite monolithic free abrasive grinding lap and a method of making the same

A composite yet monolithic, free abrasive grinding lap includes a sintered porous matrix of ceramic or metal material and a quantity of silicon, substantially completely filling the pores of the sintered porous matrix preform at least throughout an effective region of the lap that is to come in contact with a workpiece to be acted upon by the lap. The free abrasive grinding lap is made by first slip-casting a preform, then freezing and freeze-drying the same, followed by lightly sintering the dry preform into a porous matrix preform, bringing the temperature of the preform to above the melting point of silicon, and filling the pores with molten silicon.

Verfahren zur Herstellung einer Muffel für den Fein- oder Modellguss sowie Zusammensetzung zu deren Herstellung

Produkt mit ausgerichteten Partikeln

Gegebenenfalls gesintertes Produkt, umfassend eine Mehrzahl makrosopischer kegelstumpfförmiger Poren, die sich im Wesentlichen parallel zueinander in einer Längsrichtung erstrecken, wobei jede kegelstumpfförmige Pore durch eine Wand begrenzt ist, die mehr als 50% ausrichtbare keramische Körner umfasst, wobei die Wände zwischen den kegelstumpfförmigen Poren mehr als 5 Vol.-% ausrichtbare keramische Körner umfassen und eine offene Porosität unter 50% aufweisen.

Method of making a refractory article

A method of making a refractory article is provided. The method includes: a) mixing a binder system, a refractory charge, and a second colloidal binder to form an aqueous slurry; b) casting the aqueous slurry into a mold; c) subjecting the mold containing the aqueous slurry to a temperature that is lower than a slurry casting temperature for a time sufficient to form a green strength article; and d) firing the green strength article at a temperature of at least 4500 C for a time sufficient to achieve thermal homogeneity, thereby forming a refractory article. Refractory articles made in accordance with the method have a unique combination of pore structure and mechanical properties. 4R33-R9R7-rqqq x/1 ...

CERAMIC PRODUCTS

A method of producing a ceramic product comprising the steps of preparing an aqueous slurry of a silica sol with a refrac-tile material comprising a calcium or zirconium silicate, causing the slurry to gel by physical or chemical means to form a solid structure, and drying said structure to form a porous ceramic product. The product has a high green strength which nevertheless increases on heating, and may be used in building applications.

PRODUCT ORIENTED PARTICLES

Dispositif choisi notamment parmi une turbine, notamment pour la propulsion et pour la génération d'énergie, un moteur, une pompe, un effecteur, un capteur, une poignée, un joint, notamment un joint d'étanchéité, un rail de coulissement, un roulement, notamment une bille de roulement, une cage de roulement, une pièce ou un revêtement anti-usure, une buse de pulvérisation, un étrier, un robinet, une valve, un guide-fils, une bague de frottement, une armure ou élément d'armure, un blindage ou élément de blindage, un outil de formage des métaux, un outil de formage des polymères, notamment une filière, un moule d'injection, un élément d'emballage, notamment une cale, un composant électrique ou électronique, notamment une varistance, un condensateur, et un substrat pour composant électronique, ledit dispositif comportant un produit dense, éventuellement fritté, présentant une masse volumique relative supérieure à 85%, comportant plus de 50% de grains céramiques orientables, plus de 80% de grains céramiques orientables étant sensiblement parallèles les uns aux autres.

PROCESS AND DEVICE FOR SHAPING COMPONENTS MADE OF CONCRETE OR MORTAR

Relief pattern prodn. for concrete slab - using refrigerated dies which penetrate screeded layer of fresh concrete on refrigerated table

Manufacture of monolithic, stiff, lightweight ceramic articles

A light-weight yet sturdy ceramic article, is manufactured by initially forming at least one fugitive core including a main portion and at least one holding portion projecting from the main portion and then positioning the fugitive core in a mold cavity bounded by a multitude of bounding surfaces so that the holding portion holds the main portion at predetermined spacings from all of the bounding surfaces. This is followed by filling the mold cavity around the fugitive core with a dense slip constituted by ceramic or metal particles in mixture with a liquid medium to form a ceramic or metal preform embedding the fugitive core in its interior and freezing the ceramic or metal preform, then the fugitive core is dissolved and escapes from the interior of the frozen ceramic or metal preform and finally the ceramic preform is converted into the ceramic article.

CERAMIC PRODUCTS

СПОСОБ ИЗГОТОВЛЕНИЯ ЗАГОТОВКИ И УСТРОЙСТВО ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ

Предлагаемые способ и устройство касаются получения на основа шликера или густой тестообразной массы сырых заготовок 10 путем отверждения этой массы после нагнетания ее под давлением в литейную форму, имеющую температуру ниже 0°С. Литейная форма 1, 2 и подвижные части 6 силового цилиндра 7, который обеспечивает ее закрытие, размещаются в герметичном кожухе 8. Распределительное устройство 13 обеспечивает подачу во внутреннюю полость кожуха сухого газа с точкой росы ниже рабочей температуры данной литейной формы через отверстия 14. Лоток или короб 9 подводит сырую заготовку 10 через выходное отверстие 11 к приемнику 17, находящемуся за пределами упомянутого кожуха. Применяется при изготовлении спекаемых металлических или керамических деталей высокой плотности и с высокими механическими характеристиками.

Verfahren zur Herstellung einer Muffel für den Fein- oder Modellguss, Verfahren zum Herstellen eines metallischen, keramischen oder glaskeramischen Guss- oder Pressobjekts und Kit zur Herstellung eines solchen Objekts

Beschrieben werden ferner entsprechende Verfahren zur Herstellung einer Muffel für den Fein- oder Modellguss, Verfahren zum Herstellen eines metallischen, keramischen oder glaskeramischen Guss- oder Pressobjekts und Kits zur Herstellung eines solchen Objekts mit folgenden Schritten: DOLLAR A - Bereitstellen einer Modellation, DOLLAR A - Herstellen einer Einbettmasse, umfassend eine Mischung aus: DOLLAR A a) einem Dispersionsmittel, DOLLAR A b) einem Keramikpuler mit DOLLAR A (i) einer Fraktion mit einem Durchmesser von unter 500 nm (Nano-Keramikpulverfraktion) mit einem Anteil von 2-74 Vol-%, bezogen auf das Volumen der gesamten Mischung, DOLLAR A und DOLLAR A (ii) einer Fraktion mit einem Durchmesser von über 500 nm (Mikro-Keramikpulverfraktion) mit einem Anteil von 2-74 Vol.-%, bezogen auf das Volumen der gesamten Mischung, DOLLAR A c) gegebenenfalls einem Metallpulver, bestehend aus Metallen und/oder Legierungen und/oder intermetallischen Verbindungen, DOLLAR A d) gegebenenfalls anorganischem ...

Freeze-cast ceramic components

Apparatus and methods of making components of an insulating or fire protective structure are disclosed, comprising making a plurality of freeze-cast ceramic elements, each element consisting of a shell 28 formed from a freeze-castable ceramic slurry having an internal void 29 which is filled with a fibrous and / or foam and / or particulate insulation or may be left empty. The casting process taught uses cryogenic freezing and a highly thermally conducting mould 20 so that flash freezing occurs to produce a mechanically strong ceramic shell, with an internal void which may be filled with an insulating material. This material may be a further freeze cast ceramic or loose insulation. Preferably the method involves pre-cooling the slurry and pre-cooling the mould in a cryogenic environment before use. The mould may be made from metal sheets which are flexible to promote the release of the article after casting. Further, making a tunnel kiln from interlocking components is disclosed.

MOULDS

Compressed bone composition and methods of use thereof

The present disclosure relates to compressed bone compositions, bone implants, and variants thereof. The present disclosure also relates to methods of preparing compressed bone compositions, bone implants, and variants thereof. The present disclosure also relates to methods of using the bone compositions, bone implants and variants thereof.

AQUEOUS GELCASTING FORMULATION FOR CERAMIC PRODUCTS

The present disclosure relates to the manufacture of ceramic products by aqueous gelcasting. Exemplary ceramic products include sanitary ware, such as toilets and sinks. The process includes a slurrying step, a mixing step, a molding step involving aqueous gelcasting, a drying step, a glazing step, and a firing step.

Injection molding process of slips and a microstructured [...].

unidade de congelamento para conformação de peças porosas

Herstellung von feuerfesten Gegenständen durch einen Gefrier-Giessprozess

Freeze-cast components

Castable refractory material

VERFAHREN ZUR HERSTELLUNG VON BAUPLATTEN AUS HYDRAULISCHEN BINDEMITTELN

Castable refractory material

Compressed bone composition and methods of use thereof

The present disclosure relates to compressed bone compositions, bone implants, and variants thereof. The present disclosure also relates to methods of preparing compressed bone compositions, bone implants, and variants thereof. The present disclosure also relates to methods of using the bone compositions, bone implants and variants thereof.

METHOD FOR PRODUCTION OF POROUS CERAMIC MATERIAL

Disclosed is a method for producing a porous ceramic material which can i nduce the formation of a tissue (e.g., a bone tissue) rapidly and has a prac tically useful strength. Specifically disclosed is a method for producing a porous ceramic material (11), which comprises the following steps (A) to (D) : (A) dispersing a ceramic raw material in a medium to prepare a slurry (21) ; (B) filling the slurry (21) in a container (31) and inserting the containe r (31) into a cooling medium (41) at a temperature equal to or lower than th e freezing point of the slurry (21) in a given direction to cause the freezi ng of the slurry (21) in one direction with starting from one end; (C) dryin g the frozen slurry (21) to form a shaped material; and (D) burning the drie d shaped material.

Cement board mfr. - involves mixing powdered ice or snow with a hydraulic binder

Plates or boards made from a hydraulic building material are made by mixing the dry pulverised material with pulverised ice or snow, spreading the mixt. out to form an even layer, subjecting the layer to a fixed pressure, and allowing the pressed layer to set and harden above the pt of water. Pref. the compacting pressure is fixed so as to melt the ice/snow. The process yields a very uniform high density prod. The plates contg. Portland cement, sand and fibre material are used in the building industry.

PRODUCT ORIENTED PARTICLES

PRODUCT-ORIENTED FUNCTION.

Patent FR2203310A5

Precast concrete building panels - are ribbed light-weight slabs forming walls and roofs or floors

Processo e dispositivo de produção de esboços crus obtidos por injeção e solidificação em um molde

Verfahren zur Herstellung eines Keramiktiegels

Die Erfindung betrifft ein Verfahren zur Herstellung eines Keramiktiegels. Vorgeschlagen werden die Schritte: Bereitstellen eines verfestigbaren Schlickers, Bereitstellen einer Gussform (10) für den Keramiktiegel, Einfüllen des Schlickers in die Gussform, Verfestigen des Schlickers in der Gussform durch (a) Einfrieren und/oder (b) Ändern seines pH-Werts, so dass ein Vorkörper entsteht, und Wärmebehandeln des Vorkörpers, so dass ein Kermiktiegel entsteht. DOLLAR A Die Erfindung betrifft des Weiteren einen nach einem solchen Verfahren herstellbaren Keramiktiegel und ein Kit zur Herstellung eines solchen Keramiktiegels mit: DOLLAR A einer Gussform, vorzugsweise einer Metallform, für einen Keramiktiegel, einem Sol, vorzugsweise einem wässrigen SiO¶2¶-Sol, umfassend eine Nano-Keramikpartikelfraktion, Keramikpartikel, umfassend eine Mikro-Keramikfraktion, gegebenenfalls einem Metallpulver, bestehend aus Metallen und/oder Legierungen und/oder intermetallischen Verbindungen, gegebenenfalls mehreren weiteren Zusatzstoffen und gegebenenfalls organischen oder anorganischen Bindemitteln. Schließlich betrifft die Erfindung eine Vorrichtung zum Durchführen des genannten Verfahrens.

PROCESS FOR THE PRODUCTION OF CERAMIC CASTINGS

Ceramic products

PREPARING REFRACTORY ARTICLES BY A FREEZECAST PROCESS

Ceramic material 3D printing forming method

Concrete article moulding plant - has filled moulds carried by chain conveyor through refrigerated liquid

A concrete article moulding installation which freezes the material inside the mould by immersing it in water at a temperature of less than 6 deg. C, has a hopper (1) with a screw (2) which passes the wet mixture to a feed cylinder (3) which deposits the required quantity into the open moulds as they are conveyed by a chain conveyor (14) along a horizontal section above a vibrating table (6). The moulds are then closed by a cam system forming part of the track, and are carried downwards for immersion in the refrigerated liquid (8) in the insulated tank below, supported by a framework (10). At the top of the upward path, the articles are removed from the moulds and deposited onto a take-off conveyor (12).

MANUFACTORING PROCESS Of a PRODUCT MESOPOREUX.

Procédé de fabrication d'un produit mésoporeux, comportant les étapes successives suivantes a) préparation d'une barbotine comportant, - un solvant, - un additif, - plus de 4%, en pourcentage volumique sur la base de la barbotine, d'une poudre de particules céramiques, b) congélation orientée de la barbotine de manière à former un bloc comportant des cristaux de glace séparés par des parois, c) élimination des cristaux de glace dudit bloc de barbotine congelée, éventuellement démoulé, de manière à obtenir une préforme poreuse, d) élimination de l'additif de manière à obtenir un produit mésoporeux préformé, l'additif et la quantité d'additif étant choisis de manière à ce que l'additif se présente sous une phase micellaire mésoporogène dans lesdites parois, plus de 25% en volume desdites particules céramiques présentant une taille inférieure au double de la taille des mi celles de ladite phase micellaire mésoporogène.

Device for injection molding of slurries

A device for the production of a green from slurry by solidification after injection into a mold having a temperature of less than 0° C. The device includes a mold having a jack wherein moveable parts of the jack ensure closure thereof and which are housed within a gas-tight vessel. A distributor for dry gas with a dew point lower then the temperature of the mold emits a gas current into the vessel through apertures. A chute conducts the green towards an exit aperture and to a receiving member outside the vessel.

PROCESS FOR THE MANUFACTURE OF A MESOPOROUS PRODUCT

Moulded ceramic article prodn - by freezing slip in undercooled mould, demoulding, and dehydrating

Method comprises (i) freezing a body compsn., e.g. a suspension or slip, using an undercooled mould; (ii) demoulding the body obtd. by temp. shock, application of an electric field, action of chemicals or by using double-walled moulds; (iii) dehydrating the blank so that it retains its original shape and (iv) further processing.

METHOD OF MAKING A REFRACTORY ARTICLE

A method of making a refractory article is provided. The method includes: a) mixing a binder system, a refractory charge, and a second colloidal binder to form an aqueous slurry; b) casting the aqueous slurry into a mold; c) subjecting the mold containing the aqueous slurry to a temperature that is lower than a slurry casting temperature for a time sufficient to form a green strength article; and d) firing the green strength article at a temperature of at least 450º C for a time sufficient to achieve thermal homogeneity, thereby forming a refractory article. Refractory articles made in accordance with the method have a unique combination of pore structure and mechanical properties.

METHOD OF MAKING CERAMIC CORES AND OTHER ARTICLES

METHOD OF MAKING CERAMIC CORES AND OTHER ARTICLES Abstract of the Disclosure A novel method of making a ceramic core for use in casting a metal component includes freezing a ceramic slurry comprising a ceramic powder filler, a freezable liquid and a gelling agent in a mold to form a frozen core shaped body. The frozen core shaped body is removed from the mold and thawed to room temperature. A high viscosity gel is provided in the core shaped body at room temperature that is strong enough to retain the core shape until the body can be fired to form a porous, sintered ceramic core. The gel present at room temperature may be formed as the ceramic slurry is cooled in the mold cavity to form the frozen article shaped body and/or as the frozen core shaped body is thawed to room temperature.

CASTABLE REFRACTORY MATERIAL

A castable refractory material for use in the manufacture of refractory products includes fused silica, ceramic fibre, microsilica and a bonding material comprising colloidal silica.

COMPRESSED BONE COMPOSITION AND METHODS OF USE THEREOF

The present disclosure relates to compressed bone compositions, bone implants, and variants thereof. The present disclosure also relates to methods of preparing compressed bone compositions, bone implants, and variants thereof. The present disclosure also relates to methods of using the bone compositions, bone implants and variants thereof.

For the preparation of a hole in the product of the method

Fabricating sintered product used in device including e.g. ceramic electrochemical cell, involves oriented freezing the slip to form e.g. block of frozen slip, removing crystals of liquid phase of block and optionally sintering the preform

Fabricating a sintered product comprises: (a) preparing a slip comprising a set of ceramic particles suspended in a liquid phase; (b) optionally casting the slip in a mold and/or removing air bubbles present in the slip; (c) oriented freezing the slip to form a block of frozen slip and to form crystals of a solidified liquid phase separated by walls; (d) optionally demolding the block to obtain a macroporous preform; (e) removing the crystals of liquid phase of the block; (f) optionally debinding the preform; and (g) optionally sintering the preform to obtain the sintered product. Fabricating a sintered product comprises: (a) preparing a slip comprising a set of ceramic particles suspended in a liquid phase; (b) optionally casting the slip in a mold and/or removing air bubbles present in the slip; (c) oriented freezing the slip by movement of a solidification front at a speed, which is less than a speed of encapsulation of the ceramic particles, to form a block of frozen slip and to form crystals of a solidified liquid phase separated by walls having an average thickness that is = 1 of an average thickness of orientable ceramic particles (104); (d) optionally demolding the block by sublimation to obtain a macroporous preform; (e) removing the crystals of solidified liquid phase of the block; (f) optionally debinding the macroporous preform; (g) optionally sintering the macroporous preform to obtain a sintered product; and (h) optionally machining and/or impregnating the sintered product. The amount of set of ceramic particles is more than 4 vol.% and less than 50 vol.%. The set of ceramic particles comprises: a first particulate fraction constituted of orientable particles, preferably anisotropic particles having a median length, where the amount of ceramic particles is more than 1 vol.%; and a second particulate fraction having a median length, which is ten times less than the median length of the anisotropic particles, where the amount of ceramic particles is more ...

Process of moulding per barbotine injection and device for its implementation

Le procédé et le dispositif concernent la réalisation à partir d'une barbotine d'une pièce ébauche crue (10) par solidification après injection dans un moule à température inférieure à 0 degréC. Le moule (1, 2) et les parties mobiles (6) du vérin (7) qui assurent sa fermeture sont logées dans une enceinte étanche (8). Un distributeur de gaz sec (13) à point de rosée inférieur à la température du moule émet un courant gazeux par des orifices (14). Une goulotte (9) conduit l'ébauche crue (10) vers un orifice (11) et un récepteur (17) extérieur à l'enceinte. Application à la réalisation de pièces frittées métalliques ou céramiques à haute densité et hautes caractéristiques mécaniques. The method and the device relate to the production from a slip of a green blank part (10) by solidification after injection into a mold at a temperature below 0 ° C. The mold (1, 2) and the movable parts (6) of the cylinder (7) which ensure its closure are housed in a sealed enclosure (8). A dry gas distributor (13) with a dew point below the temperature of the mold emits a gas stream through orifices (14). A chute (9) leads the green blank (10) to an orifice (11) and a receiver (17) outside the enclosure. Application to the production of sintered metal or ceramic parts with high density and high mechanical characteristics.

Cast concrete elements - eg plates, beams etc

A DENSE SINTERED PRODUCT

Produit fritté - présentant une masse volumique relative supérieure à 90%, - constitué pour plus de 80% de son volume d'un empilement de plaquettes céramiques (10) à plat, l'ensemble desdites plaquettes présentant une épaisseur moyenne inférieure à 3 µm, - présentant une largeur (l) supérieure 50 mm, et - comportant plus de 20% d'alumine, en pourcentage sur la base de la masse du produit,

METHOD OF MAKING A REFRACTORY ARTICLE

A method of making a refractory article is provided. The method includes: a) mixing a binder system, a refractory charge, and a second colloidal binder to form an aqueous slurry; b) casting the aqueous slurry into a mold; c) subjecting the mold containing the aqueous slurry to a temperature that is lower than a slurry casting temperature for a time sufficient to form a green strength article; and d) firing the green strength article at a temperature of at least 450° C. for a time sufficient to achieve thermal homogeneity, thereby forming a refractory article. Refractory articles made in accordance with the method have a unique combination of pore structure and mechanical properties.

METHODS OF CASTING AND REPRODUCTION

METHOD OF CASTING AND REPRODUCTION AND AN ARTICLE PRODUCED BY THIS METHOD

POROUS ARTICLES, METHODS, AND APPARATUSES FOR FORMING SAME

A mold for forming a ceramic article can include a first material having a first thermal conductivity and a second material having a second thermal conductivity different from the first thermal conductivity. The first material may be at least partially embedded within the second material and configured to create regions of different thermal conductivity in the body, such as configured to create distinct nucleation regions within a material formed within the mold. A method for forming a ceramic article can include providing a slurry within a mold and freeze-casting the slurry to form a ceramic article having a burst-like distribution of porosity. A ceramic article according to embodiments herein can include a burst-like distribution of porosity. 1. A method for forming a porous article , comprising:freeze-casting a porous article from a slurry, the porous article comprising a burst-like distribution of porosity.2. The method of claim 1 , wherein freeze-casting a porous article from a slurry includes decreasing a temperature of a first material relative to an initial temperature of the first material in thermal contact with the slurry.3. The method of claim 2 , wherein decreasing a temperature of a first material in thermal contact with the slurry includes decreasing a temperature of the first material for greater than about 0.5 min claim 2 , and less than about 24 hours.4. The method of claim 3 , wherein decreasing a temperature of a first material in thermal contact with the slurry includes providing liquid nitrogen in thermal contact with the first material.5. A method for forming a porous article claim 3 , comprising:forming a porous article from a slurry within a mold, the mold having a first cold point and a second cold point spaced apart from the first cold point, and wherein forming the porous article comprises:forming a first group of porous channels having a burst-like distribution of porosity extending from a first nucleation region associated with the ...

Porous articles, methods, and apparatuses for forming same

A mold for forming a porous article can include a first material having a first thermal conductivity and a second material having a second thermal conductivity different from the first thermal conductivity. The first material may be at least partially embedded within the second material and configured to create regions of different thermal conductivity in the body, such as configured to create distinct nucleation regions within a material formed within the mold. A method for forming a porous article can include providing a slurry within a mold and freeze-casting the slurry to form a porous article having a burst-like distribution of porosity. A porous article according to embodiments herein can include a burst-like distribution of porosity.

CASTABLE REFRACTORY MATERIAL

A castable refractory material for use in the manufacture of refractory products including fused silica, ceramic fibre, microsilica and a bonding material comprising colloidal silica. 1. A castable refractory material for use in the manufacture of refractory products , wherein the castable refractory material includes fused silica , ceramic fiber , microsilica and a bonding material comprising colloidal silica.2. The castable refractory material according to claim 1 , comprising fused silica in a range of 30-90% by weight.3. The castable refractory material according to claim 1 , comprising ceramic fiber in a range of 5-45% by weight.4. The castable refractory material according to claim 1 , comprising microsilica in a range of 2-15%.5. The castable refractory material according to claim 1 , comprising colloidal silica in a range of 3-25%.6. The castable refractory material according to claim 1 , wherein the fused silica includes particle sizes in a range of 150 μm to 3.5 μm.7. The castable refractory material according to claim 6 , wherein the fused silica includes particles of mesh size 200 and particles of mesh size 325.8. The castable refractory material according claim 1 , wherein the ceramic fiber is a synthetic ceramic fibre.9. The castable refractory material according to claim 1 , wherein the ceramic fiber is an alkaline earth silicate fibre.10. The castable refractory material according to claim 1 , wherein the ceramic fiber is soluble in physiological fluids.11. The castable refractory material according to claim 1 , wherein the ceramic fiber is a chopped fibre having a fibre length in a range of 9-15 μm.12. The castable refractory material according to claim 1 , further comprising a dispersing agent.13. The castable refractory material according to claim 1 , further comprising a non-wetting agent in a range a 0%-12% by weight.14. A refractory product for use in aluminium processing claim 1 , comprising a cast refractory material according to .15. The ...

De-molding system of ceramic parts manufactured by freeze-casting, and mold cooling system and method for manufacturing ceramic parts by freezing-casting

Provided is a mold cooling system for the manufacturing of ceramic parts by freeze-casting including: a source (1) of cooling gas; a cooling gas cooling medium (7) fluidically connected to the cooling gas source (1); and a cooling cell (5), fluidly connected to the cooling gas cooling medium (7), including a mold (9) in its interior, wherein the cooling cell (5) includes a refrigerated cooling gas injection opening. Thus, a mold cooling system is provided for the manufacturing of ceramic parts by freeze-casting including the stages of: refrigerating a cooling gas coming from a cooling gas source (1); and injecting a cooling gas that is refrigerated in a cooling cell (5) including a mold (9) in its interior.

CERAMIC PRODUCT WITH ORIENTED PARTICLES AND METHOD FOR THE PRODUCTION THEREOF

A method includes the following steps: a) the production of a slip including more than 4% and less than 50% of ceramic particles and including: b) a first particulate fraction including of orientable particles having a median length L′50 and representing more than 1% of the ceramic particles, and c) a second particulate fraction having a median length D50 at least ten times shorter than L′50 and representing more than 1% of the ceramic particles, the first and second particulate fractions together representing more than 80% of all of the ceramic particles, in volume percentages based on the total quantity of ceramic particles; d) oriented freezing of the slip by moving a solidification front at a lower speed than the speed of encapsulation of the ceramic particles; e) elimination of the crystals of the solidified liquid phase of the block; and f) optionally sintering. 1. Process for manufacturing a product , optionally sintered , said process comprising the following steps:a) preparing a slip comprising an ensemble of ceramic particles in suspension in a liquid phase, the ensemble of ceramic particles representing more than 4% and less than 50% of the volume of the slip and comprising:{'sub': '50', 'a first particulate fraction consisting of orientable, particles having a median length L′and representing more than 1% of the ceramic particles, in percentage by volume based on the ensemble of ceramic particles; and'}{'sub': 50', '50, 'a second particulate fraction having a median length Dat least ten times less than L′and representing more than 1% the ceramic particles in percentage by volume based on the ensemble of ceramic particles;'}the first and second particulate fractions together representing more than 80% of the ensemble of ceramic particles, in percentage by volume,(b) optionally, pouring the slip into a mould and/or removing air bubbles contained in the slip,{'b': '1', 'sub': '50', '(c) oriented freezing of the slip by displacement of a solidification front ...

METHOD AND APPARATUS FOR FORMING VARIABLE DENSITY SINTERED CERAMIC USING APPLICATION OF ALTERNATING VOLTAGE TO AQUEOUS CERAMIC SUSPENSION WITH ICE-TEMPLATING

A method and apparatus for forming variable density ceramic structures, where the method includes: obtaining a ceramic powder having an ultrafine particle size; mixing the ceramic powder into a suspension fluid thus forming a ceramic suspension; providing a mold configured to retain the ceramic suspension; providing a plurality of electrodes about the mold; applying an alternating voltage to the electrodes thus forming alternating electric currents through the suspension thus causing accumulation of ceramic particles on at least one of the electrodes; reducing the temperature of the suspension thus inducing the formation of ice crystals therein necessary for ice-templating; freeze drying the frozen suspension into a porous state; and sintering the ceramic particles into a solid architecture retaining a common final structure with the ceramic particles in the porous state. 1. A method of forming variable density ceramic structures , the method comprising:obtaining a ceramic powder having an ultrafine particle size;mixing the ceramic powder into a suspension fluid thus forming a ceramic suspension;providing a mold configured to retain the ceramic suspension;providing a plurality of electrodes about the mold;applying an alternating voltage to the electrodes thus forming alternating electric currents through the suspension thus causing accumulation of ceramic particles on at least one of the electrodes;reducing the temperature of the ceramic suspension thus inducing the formation of ice crystals therein;freezing the ceramics suspension until the suspension fluid is completely frozen;drying the frozen suspension so as to remove the suspension fluid and leaving the ceramic powder, the ceramic powder being retained in a porous accumulated state; andsintering the ceramic particles into a solid architecture retaining a common final structure with the ceramic particles in the porous accumulated state.2. The method of forming variable density ceramic structures of claim 1 , ...

CERAMIC LAMELLAR COMPOSITES

Disclosed herein is a method of: placing between a cooling element and an opposing surface a slurry of: a dielectric powder containing barium titanate, a dispersant, a binder, and water; maintaining the cooling element at a temperature below the opposing surface to cause the formation of ice platelets perpendicular to the surface of the cooling element and having the powder between the platelets; subliming the ice platelets to create voids; sintering the powder to form the dielectric material; and filling the voids with the polymeric material. The process can produce a composite having: a sintered dielectric material of barium titanate and platelets of a polymeric material embedded in the dielectric material. Each of the platelets is perpendicular to a surface of the composite. 1. A method comprising: 'wherein the cooling element is templated to promote the formation of platelets that are parallel to each other;', 'placing between a cooling element and an opposing surface, a slurry comprising: a powder of a dielectric material, a dispersant, a binder, and water;'}maintaining the cooling element at a temperature below the opposing surface to cause the formation of ice platelets perpendicular to the surface of the cooling element and having the powder between the platelets;subliming the ice platelets to create voids;sintering the powder to form the dielectric material; andfilling the voids with the polymeric material.2. The method of claim 1 , wherein the dielectric material comprises barium titanate.3. The method of claim 1 , wherein the polymeric material is an epoxy claim 1 , a polyurethane claim 1 , or a silicone.4. The method of claim 1 , wherein the opposing surface is a second cooling element.5. The method of claim 1 , wherein the difference in temperature between the cooling element and the opposing surface is about 5 to about 70° C.6. The method of claim 1 , wherein the cooling element is templated by directional abrasion. This application is a divisional ...

COMPRESSED BONE COMPOSITION AND METHODS OF USE THEREOF

The present disclosure relates to compressed bone compositions, bone implants, and variants thereof. The present disclosure also relates to methods of preparing compressed bone compositions, bone implants, and variants thereof. The present disclosure also relates to methods of using the bone compositions, bone implants and variants thereof. 1. A method for preparing a compressed bone composition , comprising:loading bone particles into a mold with a predetermined shape,applying pressure between about 0.1 and 30 MPa to the bone particles, andfreeze drying the compressed bone particles to create the compressed bone composition.2. The method according to claim 1 , wherein the pressure is from about 0.1 MPa to about 6 MPa.3. The method according to claim 1 , wherein the pressure is between 100 psi and 1000 psi.4. The method according to claim 1 , wherein said predetermined shape comprises grooves.5. The method according to claim 1 , wherein the compressed bone composition retains its integrity in liquid for at least 5-30 minutes.6. The method according to claim 1 , wherein the pressure is applied at room temperature.7. The method according to claim 1 , wherein the compressed bone composition does not comprise a binder or a chemical cross-linker.8. The method according to claim 1 , wherein said bone particles comprise bone fiber claim 1 , bone powder claim 1 , or a mixture of bone fiber and bone powder.9. The method according to claim 1 , wherein said bone particles are from cortical bone claim 1 , cancellous bone claim 1 , cortical cancellous bone claim 1 , or a mixture of cortical and cancellous bone.10. The method according to claim 1 , further comprising demineralizing the bone particles prior to applying the pressure.11. The method according to claim 1 , further comprising cleaning the bone particles prior to applying the pressure.12. The method according to claim 11 , wherein said cleaning comprising incubating the bone particles with an antibiotic claim 11 , a ...

PROCESS FOR THE MANUFACTURE OF A MESOPOROUS PRODUCT

Process for the manufacture of a mesoporous product comprising the following successive steps: 1. A process for the manufacture of a mesoporous product comprising the following successive steps: a solvent,', 'an additive,', 'more than 4%, as percentage by volume based on the slip, of a powder formed of ceramic particles,, 'a) preparation of a slip comprisingb) optionally, observation of a waiting time,c) optionally, pouring the slip into a mold and/or removal of air bubbles present in the slip,d) oriented freezing of the slip, so as to form a block comprising ice crystals separated by walls,e) optionally, removal of said frozen slip block from the mold,f) removal of the ice crystals from said frozen slip block, optionally removed from the mold, preferably by sublimation, so as to obtain a porous preform,g) removal of the additive, so as to obtain a preformed mesoporous product or “preform”,h) optionally, sintering of the porous preform obtained at the end of step f) org), so as to obtain a sintered mesoporous product,i) optionally, machining and/or impregnating said sintered mesoporous product,it being possible for the ceramic particles to be partially or completely replaced by equivalent amounts of precursors of particles, the process being adjusted in order for said precursors of particles to be converted into ceramic particles before step g),the additive, referred to as “mesopore-forming additive”, and the amount of additive being chosen so that the additive is present in a mesopore-forming micellar phase in said walls, preferably in an organized mesopore-forming micellar phase,more than 25% by volume of said ceramic particles exhibiting a size less than twice the size of the micelles of said mesopore-forming micellar phase.2. The process as claimed in claim 1 , in which the additive and the amount of additive are chosen so that the additive exists in an organized mesopore-forming micellar phase in said walls and/or the amounts of additive and solvent are ...

FREEZE TAPE CASTING SYSTEMS AND METHODS

A freeze tape casting system is provided that maximizes the production speed of a tape material with a directional porosity through a thickness of the tape material. Embodiments of the system may have multiple freeze zones where a freeze zone has a temperature profile and dwell time that is tailored to one or more parts of the physical process of freezing a solvent in the tape material to create the directional porosity. Various zones can be directed to physical processes such as nucleation, transitional crystal growth, steady crystal growth, maintaining the tape material in a frozen state, sublimating the frozen solvent, etc. As a result, the physical processes are decoupled from each other to maximize production speed. The resulting material has applicability in electrodes, current collectors, and other products. 1. A freeze tape casting system , comprising:a carrier film moving in a production direction;a slurry having a solvent, the slurry deposited onto the moving carrier film to form a tape material;a nucleation zone extending a first distance along the production direction, and the nucleation zone providing a nucleation temperature profile beneath the carrier film to initiate nucleation of the solvent from a liquid phase to a solid phase at a plurality of discrete locations in the tape material; anda steady growth zone extending a second distance along the production direction and positioned after the nucleation zone in the production direction, and the steady growth zone providing a steady growth temperature profile beneath the carrier film to continue freezing of the solvent from at least one of the plurality of discrete locations in a growth direction through a thickness of the tape material, wherein the nucleation temperature profile is distinct from the steady growth temperature profile, and the first distance is distinct from the second distance.2. The freeze tape casting system of claim 1 , further comprising:a transition zone extending a third ...

DE-MOLDING SYSTEM OF CERAMIC PARTS MANUFACTURED BY FREEZE-CASTING, AND MOLD COOLING SYSTEM AND METHOD FOR MANUFACTURING CERAMIC PARTS BY FREEZING-CASTING

This invention provides a de-molding system of ceramic parts manufactured by freeze-casting comprising a mold (), wherein the mold () comprises an upper opening () and a lower opening (), wherein the upper opening () is adapted to receive a colloidal suspension (), and one of the openings is adapted to allow the passage of a manufactured ceramic part (), characterized by comprising at least one main de-molding element () adapted to actuate a ceramic part manufactured () through an opening in the mold (). 1999594959280929. De-molding system of ceramic parts manufactured by freeze-casting comprising a mold () , wherein the mold () comprises an upper opening () and a lower opening () , wherein the upper opening () is adapted to receive a colloidal suspension () , and one of the openings is adapted to allow the passage of a manufactured ceramic part , characterized by comprising at least one main de-molding element () adapted to actuate a ceramic part () manufactured through an opening in the mold ().29. System according to claim 1 , characterized by the mold () comprising a cylindrical shape.39181918080991. System according to claim 1 , characterized by comprising a central mold element () claim 1 , and a de-molding auxiliary element () adapted to actuate the central mold element () counter to the direction of actuation of the main de-molding element () claim 1 , wherein the main de-molding element () is adapted to slide between the mold () and the central mold element ().493949. System according to claim 1 , characterized by comprising a sealing element () sealing the lower opening () of the mold ().580. System according to claim 1 , characterized by the main de-molding element () being coupled to a mechanical-hydraulic system.680818080081810. System according to claim 1 , characterized by the main de-molding element () comprising a tube shape claim 1 , and the de-molding auxiliary element () comprising a pin shape claim 1 , wherein the main de-molding element () is ...

COMPRESSED BONE COMPOSITION AND METHODS OF USE THEREOF

The present disclosure relates to compressed bone compositions, bone implants, and variants thereof. The present disclosure also relates to methods of preparing compressed bone compositions, bone implants, and variants thereof. The present disclosure also relates to methods of using the bone compositions, bone implants and variants thereof. 130-. (canceled)31. A bone composition comprising bone fibers , wherein the bone fibers comprise microfibers having an average length (L) and an average width (W) , wherein the average L:W ratio is greater than about 2.32. The bone composition of claim 31 , wherein the average L:W ratio is greater than about 5.33. The bone composition of claim 31 , wherein the average L:W ratio is greater than about 7.34. The bone composition of claim 31 , wherein the average L:W ratio is in a range from 2 to 30.35. The bone composition of claim 31 , wherein the average L:W ratio is in a range from 5 to 8.36. The bone composition of claim 31 , wherein the W of the microfibers is less than about 2 μm.37. The bone composition of claim 31 , wherein the W of the microfibers is less than about 1 μm.38. The bone composition of claim 31 , wherein the L of the microfibers is less than about 12 μm.39. The bone composition of claim 31 , wherein the L of the microfibers is less than about 7 μm.40. (canceled)41. The bone composition of claim 31 , wherein the bone composition is wet and the mode of the pore sizes of the wet bone composition is in a range from 25 to 250 μm.42. The bone composition of claim 41 , wherein the mode of pore sizes of the wet bone composition at equilibrium does not have a bimodal distribution.43. The bone composition of claim 31 , wherein when the bone composition is wet claim 31 , the mean of the pore sizes of the wet bone composition is in a range from 20 to 100 μm.44. The bone composition of claim 43 , wherein the mean of pore sizes of the wet bone composition at equilibrium is less than 30 μm or more than 65 μm.45. A method of ...

DENSE SINTERED PRODUCT

Sintered product having a relative density of greater than 90%, with, to more than 80% of the volume thereof, a stack of flat ceramic platelets, the assembly of the platelets having a mean thickness of less than 3 μm, having a width of greater than 50 mm, and including more than 20% of alumina, as a percentage on the basis of the weight of the product. The width of the product is the largest dimension measured in the plane in which the length of the product is measured, along a direction perpendicular to the direction of the length. The length of the product is the largest dimension thereof in a plane parallel to the general plane in which the platelets extend. 2. The product as claimed in claim 1 , having{'sub': '1c', 'sup': '1/2', 'a crack initiation toughness Kof greater than 3.5 MPa·m, and/or'}{'sub': 'jc', 'sup': '1/2', 'a toughness Kof greater than 6 MPa·m, and/or'}a relative density of greater than 95%, and/ora mean platelet thickness of less than 2.0 μm, and/ora width of greater than 60 mm, and/or whereinmore than 70% by number of the platelets comprise more than 70% by weight of alumina.3. The product as claimed in claim 2 , having{'sub': '1c', 'sup': '1/2', 'a crack initiation toughness Kof greater than 5 MPa·m, and/or'}{'sub': 'jc', 'sup': '1/2', 'a toughness Kof greater than 8 MPa·m, and/or'}a relative density of greater than 98%, and/ora mean platelet thickness of less than 1.5 μm, and/ora width of greater than 85 mm, and/or whereinmore than 95% by number of the platelets comprise more than 95% by weight of alumina.4. The product as claimed in claim 1 , containing more than 1% and less than 20% of boron nitride claim 1 , by weight on the basis of the weight of said product claim 1 , the boron nitride being present in the form of platelets.5. The product as claimed in claim 1 , wherein more than 90% by number of the platelets have a length of less than 70 μm and greater than 2 μm.9. A process for manufacturing a sintered product claim 1 , said process ...

Method for creating ice structures

A method for building an ice structure includes making a plurality of ice logs and attaching the ice logs together to form a support structure. The support structure may be two or more stories high and may be constructed by freezing the ice logs together.

A Method of Fabricating Basalt Block, A Basalt Block Fabricated Thereof And A Ripening Storage Using The Same

The present invention relates to a method for manufacturing a large basalt block without defects such as cracks, a basalt block manufactured thereby, and an aging chamber using the same. The method of the present invention comprises the steps of: preparing a basalt gemstone having a size of 0.1 to 5cm; removing impurities present on a surface by washing the basalt gemstone with water; drying the washed basalt gemstone at 100 to 150°C; pulverizing the dried basalt gemstone; preparing basalt powder by selecting a pulverized material using a sieve; melting the basalt powder at 2,000 to 2,500°C; cooling a basalt molten material to manufacture a basalt solid; and processing the basalt solid to manufacture a basalt block. Accordingly, the basalt block having excellent far-infrared radiation and antibacterial characteristics is provided.

Manufacturing method of board for floor heat module

The present invention relates to a method for manufacturing a board for a floor heating module, which comprises: a step of pulverizing pearlite to manufacture pearlite powder; a step of adding water and a surfactant to the pearlite powder to manufacture slurry; a step of thermally treating the slurry at 1,500 to 2,000℃ to manufacture a plastic expanded board; and a step of cooling the plastic expanded board with water to manufacture a board. According to the present invention, floor heating efficiency of the floor heating module can be improved.

Ceramic products

이 발명은 칼슘 또는 지르코늄 실리케이트를 포함하는 내화성 재료를 실리카 졸에 혼합하여서 된 것의 수성 슬러리를 준비하는 단계와, 이 슬러리를 물리적 또는 화학적 수단으로 겔화시켜 고형 구조물로 성형하는 단계와, 이 구조물을 건조시켜 다공성의 세라믹물로 성형하는 단계를 포함하는 세라믹물 제조방법 및 이 방법으로 만들어진 세라믹물에 관한 것이다. 본 세라믹물은 가열시 한층 더 증대되는 높은 습태강도를 가지며, 건물의 내외장재용으로 사용될 수 있다. The present invention comprises the steps of preparing an aqueous slurry of a mixture of a refractory material comprising calcium or zirconium silicate in a silica sol, gelling the slurry into a solid structure by physical or chemical means, and drying the structure. It relates to a ceramic material manufacturing method comprising the step of forming into a porous ceramic material and a ceramic material made by this method. This ceramic material has a high wet strength which is further increased upon heating, and can be used for interior and exterior materials of buildings.

Process for the production of ceramic or powder-metallurgical shaped bodies

Verfahren zur Herstellung eines keramischen oder pulvermetallurgischen, geformten Körpers, bei dem eine hohle Form, die ganz oder teilweise aus einer gefrorenen Flüssigkeit besteht, auf ihrer inneren Oberfläche die Negativform des herzustellenden Körpers aufweist, mit einer gießfähigen, gekühlten keramischen oder pulvermetallurgischen Suspension befüllt wird, wobei die Suspension eine Temperatur von mindestens 1 K unterhalb der Schmelztemperatur der gefrorenen Flüssigkeit aufweist, und nach dem Befüllen mit der Suspension die Form mit dem Körper eingefroren und anschließend gefriergetrocknet wird.

Product comprising an oriented function and process for obtaining same

Preparation of a slip including more than 4% and less than 50% of ceramic particles and including more than 1% of orientable ceramic particles made of a material including an oriented function, as volume percentage on the basis of the set of ceramic particles, wherein the fraction of non-orientable ceramic particles has a median length less than ten times the median length of the orientable ceramic particles if the set of ceramic particles includes less than 80%, as volume percentage, of orientable ceramic particles, oriented freezing of the slip by movement of a solidification front at a speed less than the speed of encapsulation of the ceramic particles; elimination of the crystals of solidified liquid phase of said block, optionally, sintering.

CASTLE ILDFAST MATERIAL

Complicated metal or ceramic component prodn. - by vacuum slip casting of thixotropic powder slip

(A) Complicated metal or ceramic components are produced from powders by a paste or slip process in which the powder is mixed with a binder and a dispersing agent, suspended in a solvent and poured into a casting mould. The novelty is that the slip has a high solids content so that, at rest, it is viscous enough not to flow but can be converted to a fluid state by vibration. The slip is poured as a thin stream under vacuum into the vibrating casting mould and, after air and/or gas bubble removal, the vacuum is released and the filled mould is frozen. (B) Appts. for carrying out the process comprises a vacuum-tight closed slip container (1) with a slip inlet valve (2), a vacuum chamber (3) with air outlet (4) and inlet (6) valves and a vacuum pump (5), and an elastic casting mould (7) of silicone rubber, all these components being mounted on a steplessy controllable vibrating table (8). USE/ADVANTAGE - The process is esp. useful in prodn. of turbine components. It allows prodn. of bubble-free intermediate products of complicated shape with any desired cross-section, these intermediate products allowing reproducible prodn. of pore-free finished products which require little or no machining.

Product with oriented function

Ceramic Porous Body With Communication Macropores and Process for Producing the Ceramic Porous Body

The present invention is a method for producing a ceramic porous body with high porosity and continuous macropores, which comprises mixing a ceramic powder with an aqueous solution of a gelable water-soluble polymer to form a slurry, gelling for a while to fix the tissue structure, freezing it to produce ice crystals in the gel tissue and creating structures that become continuous pores, thawing the ice by controlled atmospheric substitution-type drying method with the resulting water being replaced without damaging the gel, and then sintering it to produce a ceramic porous body having various porosities, pore diameters and pore shapes, while conventionally cracks and contraction were likely to occur during drying when the solids concentration of the slurry is less than 20 vol %, with the method of the present invention it is possible to control these problems even at a solids concentration of 10 vol % or less, manufacture and provide a ceramic porous body with a porosity of 72% to 99% and a compression strength of 0.4 MPa or more.

Castable refractory material

A castable refractory material for use in the manufacture of refractory products includes fused silica, ceramic fibre, microsilica and a bonding material comprising colloidal silica.

Freeze tape casting systems and methods

本發明提供一種將一條帶材料之生產速度最大化之冷凍條帶鑄造系統，條帶材料具有貫穿條帶材料之一厚度之一方向性孔隙。系統之實施例可具有多個冷凍區帶，其中一冷凍區帶具有一溫度分佈及停留時間，溫度分佈及停留時間係針對冷凍條帶材料中之一溶劑以形成方向性孔隙之物理程序之一或多個部分而制定。各個區帶可涉及到諸如成核、過渡晶體生長、穩定晶體生長、將條帶材料維持於一已冷凍狀態、使已冷凍溶劑昇華等物理程序。因此，物理程序彼此解耦以使生產速度最大化。所得材料可應用於電極、集電器及其他產品中。

A kind of method that gel pouring combination freeze-drying prepares porous ceramics

本发明涉及一种凝胶浇注结合冷冻干燥制备多孔陶瓷的方法，包括：向水中加入水溶性异丁烯类聚合物、烧结助剂和陶瓷粉体，球磨混合后得到水基浆料；将所得水基浆料经真空脱气后注入模具中并密封，置于15～30℃下凝胶处理3～120小时；将凝胶处理后的密封的模具在‑273～0℃下冷冻0.01～10小时，使陶瓷坯体固化成型；将所得陶瓷坯体脱模后，再经真空冷冻干燥、预烧和烧结得到所述多孔陶瓷。本发明结合了凝胶浇注和冷冻干燥两种工艺，通过少量凝胶剂在坯体凝胶过程中形成的三维聚合物网络，有效抑制了冷冻干燥过程中冰晶的长大，从而实现了对多孔陶瓷微观结构和力学性能有效的调控。

PRODUCTION OF SINTER-CERAMIC MOLDED BODIES

For manufacturing sintered ceramic moulded bodies and particularly moulded bodies of abrasive material including an abrasive material with relatively coarse grains such as corundum or carborundum, an aqueous mixture of raw material in question is cast into a mould for example of rubber, and withdrawn from the mould. The cooled moulded mixture is subjected to a freeze-drying process before it is fired. A particularly convenient mixture for a moulded body of abrasive material is a mixture comprised of (with respect to the dry mixture) about 70% by weight of refined corundum of which the grain size varies between 50 and 280 mesh, and of a base substance consisting substantially of pulverulent alpha -aluminium oxide with addition of potash feldspar, zirconium silicate and dextrine, and having a sintering temperature of 1770<o>C (2043<o>K).

Ceramic products

A method of producing a ceramic product comprising the steps of preparing an aqueous slurry of a silica sol with a refractile material comprising a calcium or zirconium silicate, causing the slurry to gel by physical or chemical means to form a solid structure, and drying said structure to form a porous ceramic product. The product has a high green strength which nevertheless increases on heating, and may be used in building applications.

High-strength ceramic tile with bionic bamboo wall structure and preparation method thereof

本发明公开了一种高强度仿生竹壁结构的陶瓷砖，包括陶瓷基体和覆于陶瓷基体上的釉面层，陶瓷基体是由多孔或实心陶芯和包绕陶芯的仿竹壁结构陶瓷组成，本发明的陶瓷砖载荷能力极强，其结构变化可控，较之传统的多孔陶瓷砖强度更高，产品的应用范围内更广，且制备方法简单，便于大规模生产应用。

Method for freeze molding

The present invention includes a method for freeze molding, comprising the steps of: mixing poly(vinyl alcohol) or a modified additive thereof with a material slurry to obtain a mixture; pouring the mixture into a molding die; and subjecting the mixture in a molding die to at least one cycle of cooling and heating so as to obtain a compact. A compact obtained in this method is free from melting and can maintain its configuration even if the compact is kept at a temperature of freezing point or higher. Further, since the method does not require vacuum drying, the compact can easily be dried.

Porous ceramic material and method of producing the same

Provision of a porous ceramic material which rapidly induces bone tissue formation and has practical strength. A porous ceramic material 11 having substantially unidirectionally oriented pores 12 , a porosity of 40-90%, and an average open area of one pore of 0.05×10 −3 -50×10 −3 mm 2 both in a first sectional surface perpendicular to the pore 12 orientation direction and a second sectional surface parallel to the first sectional surface and 5 mm distant from the first sectional surface in the pore 12 orientation direction. Using the material 11 , when a cylindrical test piece (diameter 3 mm×height 5 mm, the pore 12 array direction as a height direction) made of the material is dipped in polyethylene glycol up to 1 mm from one end thereof, polyethylene glycol permeates through the whole test piece preferably within 30 seconds.

Compressed bone composition and methods of use thereof

본 발명은 압축된 골 조성물, 골 임플란트, 및 이의 변형체에 관한 것이다. 본 발명은 또한 압축된 골 조성물, 골 임플란트, 및 이의 변형체를 제조하는 방법에 관한 것이다. 본 발명은 또한 골 조성물, 골 임플란트 및 이의 변형체를 이용하는 방법에 관한 것이다. The present invention relates to compressed bone compositions, bone implants, and variants thereof. The present invention also relates to a method of making a compressed bone composition, a bone implant, and a variant thereof. The present invention also relates to methods of using bone compositions, bone implants and variants thereof.

Composite monolithic free abrasive grinding lap and a method of making the same

A composite yet monolithic, free abrasive grinding lap includes a sintered porous matrix of ceramic or metal material and a quantity of silicon, substantially completely filling the pores of the sintered porous matrix preform at least throughout an effective region of the lap that is to come in contact with a workpiece to be acted upon by the lap. The free abrasive grinding lap is made by first slip-casting a preform, then freezing and freeze-drying the same, followed by lightly sintering the dry preform into a porous matrix preform, bringing the temperature of the preform to above the melting point of silicon, and filling the pores with molten silicon.

CERAMIC PRODUCTS

Method of producing a porous ceramic material

Dense sintered product

本发明涉及烧结产品：‑具有大于90％的相对密度；‑对于其体积的超过80％，由堆叠的平坦的小陶瓷片(10)形成，所有的所述小片均具有小于3μm的平均厚度；‑具有大于50mm的宽度(l)；以及‑基于产品的重量以百分比计，包含超过20％的氧化铝，该产品的宽度(l)是在测量产品的长度所在的平面(C)中在垂直于所述长度的方向的方向上测量的最大尺寸，所述产品的长度(L)是所述产品在平行于小片延伸的总体平面的平面(C)中的最大尺寸。

Compressed bone composition and methods of use thereof.

La presente divulgación se refiere a composiciones de hueso comprimido, implantes de hueso y variantes de los mismos. La presente divulgación también se refiere a métodos para preparar composiciones de hueso comprimido, implantes de hueso y variantes de los mismos. La presente divulgación también se refiere a métodos para usar las composiciones de hueso, implantes de hueso y variantes de los mismos.

Method of making a refractory article.

Se proporciona un método para fabricar un artículo refractario. El método incluye: a) mezclar un sistema aglutinante, una carga refractaria y un segundo aglutinante coloidal para formar una suspensión acuosa; b) verter la suspensión acuosa en un molde; c) someter el molde que contiene la suspensión acuosa a una temperatura inferior a la temperatura de fundición de suspensión durante un tiempo suficiente para formar un artículo de resistencia en verde; y d) cocer el artículo de resistencia en verde a una temperatura de al menos 450 ºC durante un tiempo suficiente para lograr la homogeneidad térmica, formando así un artículo refractario. Los artículos refractarios fabricados de acuerdo con el método tienen una combinación única de estructura de poros y propiedades mecánicas.

Ceramic polymer composite material and preparation method thereof

本发明涉及一种陶瓷高分子复合材料及其制备方法，所述复合材料包括体积百分数为18％‑85％的陶瓷骨架以及体积百分数为15％‑82％的高分子材料；所述陶瓷骨架包括层状结构，所述层状结构中每相邻的两个片层形成桥连结构，所述高分子材料填充于所述陶瓷骨架的孔隙中；所述复合材料是通过将陶瓷骨架的原料混合得到浆料，采用双向冷冻铸造将所述浆料制成具有堆叠的层状结构的生胚，将所述生胚置于压缩模具中进行体积压缩后，依次进行脱胶处理和烧结处理得到陶瓷骨架，将所述陶瓷骨架浸渗于液态树脂中制得的。采用本发明所述技术方案制得的陶瓷高分子复合材料具有较佳的力学性能以及较好的透光度，更加适用于义齿材料。

Hydrogel injection molding method for ceramic products

本披露涉及通过水凝胶注模成型来制造陶瓷产品。示例性陶瓷产品包括卫生陶瓷，比如马桶和水槽。该方法包括浆化步骤、混合步骤、涉及水凝胶注模成型的模制步骤、干燥步骤、上釉步骤以及烧制步骤。

Process for preparing silicate porous product

A process for preparing a silicate porous product, which comprises a step of forming a clay mineral into a dispersion by means of a dispersant, a step of removing gases dissolved in the dispersion, a step of freezing the dispersion and drying it in its frozen state under reduced pressure, and a step of firing the dried product obtained by the drying.

Method for creating ice structures

A method for building an ice structure includes making a plurality of ice logs or ice beams and attaching the ice logs together to form a support structure. The support structure may be two or more stories high and may be constructed by freezing the ice logs or ice beams together.

Ceramic molded product and manufacturing method thereof

A method of manufacturing a ceramic molded product includes adding a binder mainly comprising a saccharide and water to a powder of ceramics such as silicon carbide and stirring the same to form an aqueous sludge having a fluidity, casting the sludge into an elastic die, molding the sludge while applying vibrations in a negative pressure state, solidifying the sludge by putting the die in which the sludge is cast to a temperature below freezing point for freeze-drying, and to a temperature where the binder is not frozen completely, then thawing the sludge in the negative pressure state and subliming and evaporating the water content in the binder, taking the molded product solidified in the die out of the die, further dewatering the demolded product by elevating the temperature to a temperature where the saccharide in the binder is dissolved, and then sintering the molded product.

Homogenized alumina ceramic and preparation method thereof

本发明提供一种均质化氧化铝陶瓷及其制备方法，能够解决现有制备方法无法获取均质化氧化铝陶瓷的技术问题。其中，均质化氧化铝陶瓷的制备方法包括：配制混合料浆：将一定质量配比的硅溶胶、水溶性大分子有机物以及氧化铝陶瓷粉体依次混合均匀得到混合料浆；制备均质氧化铝陶瓷，包括：将所述混合料浆注入模具并控制所述模具迅速悬浮在液氮环境中，以使所述混合料浆固化成型，得到坯体；将所述坯体脱模并进行后处理即得均质氧化铝陶瓷。

Dense sintered product

The invention relates to a sintered product: - having a relative density of more than 90%; - with more than 80% of the volume thereof formed by a stack of flat small ceramic plates (10), all of said small plates having a mean thickness of less than 3 µm; - having a width (l) greater than 50 mm; and - comprising more than 20% of alumina, as a percentage based on the weight of the product, the width (l) of the product being the largest dimension measured in the plane (C) in which the length of the product is measured, in a direction perpendicular to the direction of said length, the length (L) of said product being the largest dimension thereof in a plane (C) parallel to the general plane in which the small plates extend.

Method for preparing ceramic crucible

本发明涉及一种制备陶瓷坩埚的方法。提出了下列步骤：提供可固化的料浆；提供陶瓷坩埚的浇注模具(10)，将料浆倒入浇注模具，使料浆在模具中通过下列方法固化：(a)冷冻和/或(b)改变料浆pH值，从而得到预成型坯体，对预成型坯体进行热处理，制得陶瓷坩埚。本发明还涉及利用所述方法制备的陶瓷坩埚和制备所述陶瓷坩埚的成套装置，包括：陶瓷坩埚的浇注模具，优选的是金属模具；溶胶，优选的是包含纳米陶瓷颗粒组分的SiO 2 水溶胶；包含微粒陶瓷组分的陶瓷颗粒；任选的由金属和/或合金和/或金属间化合物组成的金属粉末；任选的一种或多种其它添加剂和任选的有机或无机结合剂。本发明还涉及实施所述方法的设备。

Castable refractory material

Aqueous gelcasting formulation for ceramic products

The present disclosure relates to the manufacture of ceramic products by aqueous gelcasting. Exemplary ceramic products include sanitary ware, such as toilets and sinks. The process includes a slurrying step, a mixing step, a molding step involving aqueous gelcasting, a drying step, a glazing step, and a firing step.

Method and equipment system for producing blank of domestic ceramics and industrial art ceramics

本发明公开了一种日用陶瓷与工艺美术陶瓷制坯方法及其设备系统，所述设备系统包括冷冻室、机床、电动转盘、电加热棒、烘干室、传送带、冷冻液和泥浆原料，所述冷冻室、机床、电动转盘、电加热棒和烘干室依次设置在传送带的一侧，所述冷冻液通过冷冻室制成圆柱形冰块，所述圆柱形冰块通过机床制成陶瓷内模，当所述泥浆原料贴合在陶瓷内模上时，所述泥浆原料通过电动转盘塑造成陶瓷内模的形状，所述陶瓷内模通过电加热棒融化制成陶瓷胎坯，所述陶瓷胎坯内部水分通过烘干室烘干完成制坯的过程，利用此方法本发明可制得陶瓷内部比较复杂的陶瓷胎坯，相较于手工拉坯阀，没有经验的人也可完成，而且可完成不同形状的异性产品。

Castable refractory material

用于制造耐火制品的可浇铸的耐火材料，其包括熔融石英、陶瓷纤维、硅微粉和包含胶体二氧化硅的粘结材料。

Heat-conducting and heat-storing concrete material with short final setting period and preparation method and application thereof

本发明公开了一种短终凝期的导热和储热混凝土材料及其制备方法和应用，属于建筑材料技术领域。本发明的一种短终凝期的导热和储热混凝土材料，各组分重量份数为：水泥18份～20份，淀粉1份～2份，砂40～50份，相变聚苯乙烯微胶囊6～8份，石墨5份～10份，天然卵石子15～25份；其中：水泥、相变聚苯乙烯微胶囊和淀粉用水混合均匀后，用真空冷冻干燥工艺进行干燥后使用。本发明充分利用初凝期的可塑性，将水泥活性部分激发后，然后进行真空冷冻干燥工艺，冰晶升华干燥后，形成灰白色蜂窝状薄脆块的结构，该结构为粉碎至任意粒度打下良好的基础。而且，能够应用于各种建筑使用。

Ceramic product with oriented particles and their manufacturing process

Procedimiento de fabricación de un producto, eventualmente sinterizado, comprendiendo dicho procedimiento las etapas siguientes: a) preparar una barbotina que comprenden un conjunto de partículas cerámicas en suspensión en una fase líquida, representando el conjunto de partículas cerámicas más del 4% y menos del 50% del volumen de la barbotina y comprende: - una primera fracción particular constituida de partículas orientables, preferentemente, anisótropas, que presenta una longitud media L'50 y representa más del 1% de las partículas cerámicas, en porcentaje volúmico en la base del conjunto de las partículas cerámicas; y - una segunda fracción particular que presenta una longitud media D50 al menos diez veces inferior a L'50 y representa más del 1%, preferentemente, más del 3%, y preferentemente, menos del 89% de las partículas cerámicas, en porcentaje volúmico en base al conjunto de las partículas cerámicas; - las primera y segunda fracciones particulares representan juntas más del 80% del conjunto de las partículas cerámicas, en porcentaje volúmico, - el conjunto de las partículas cerámicas comprende menos del 1%, preferentemente, menos del 0,5% de partículas orientables con función orientada, en porcentaje volúmico en base al conjunto de las partículas cerámicas, - siendo un material con función orientada cuando presenta al menos una propiedad, diferente de mecánica, orientada, cuya intensidad es variable según la orientación de la medición, en una proporción tal que existe al menos una dirección según la cual dicha propiedad es al menos 1,1 veces superior, al valor medio de dicha propiedad según las otras direcciones, b) opcionalmente, vertido de la barbotina en un molde y/o eliminación de burbujas de aire contenidas en la barbotina, c) congelación orientada de la barbotina por desplazamiento de un frente de solidificación a fin de formar un bloque de barbotina congelada, siendo la velocidad Vp del frente de solidificación inferior a la velocidad de ...

Porous ceramic material and method for producing the same

骨組織形成を速やかに誘導し、且つ実用的な強度を有する、多孔質セラミックス材料を提供すること。実質的に一方向に配向した空孔１２を有し、気孔率が４０〜９０％であり、空孔１２の配向方向に対して垂直方向の第１の切断面、および、第１の切断面と平行であり第１の切断面から空孔１２の配向方向に５ｍｍ離れた第２の切断面の両方において、空孔１つあたりの開口面積の平均値が０．０５×１０-３〜５０×１０-３ｍｍ２である、多孔質セラミックス材料１１。当該材料１１は、空孔１２の配列方向を高さ方向とする直径３ｍｍ×高さ５ｍｍの円柱状の当該材料からなる試験片をその片端から１ｍｍまでをポリエチレングリコールに浸したときに好ましくは３０秒以内に該試験片全体にポリエチレングリコールが浸透する。 To provide a porous ceramic material that promptly induces bone tissue formation and has practical strength. A first cut surface that has pores 12 oriented substantially in one direction, has a porosity of 40 to 90%, and is perpendicular to the orientation direction of the pores 12, and a first cut surface The average value of the opening area per hole is 0.05 × 10 −3 to 50 in both of the second cut surfaces parallel to the first cut surface and 5 mm away from the first cut surface in the orientation direction of the holes 12. Porous ceramic material 11 which is × 10 −3 mm 2. The material 11 is preferably 30 when a cylindrical test piece having a diameter of 3 mm and a height of 5 mm with the hole 12 being arranged in the height direction is immersed in polyethylene glycol from one end to 1 mm. Within 2 seconds, polyethylene glycol penetrates the entire specimen.

Method of forming multilayer green sheet

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Refractory ceramic shaped body, in particular kiln furniture, and method for its production

Beschrieben wird ein Verfahren zur Herstellung feuerfester keramischer Formkörper umfassend zumindest 60 Vol.-% Mullit, bezogen auf die Gesamtmasse des feuerfesten keramischen Formkörpers, mit folgenden Schritten: – Bereitstellen oder Herstellen eines gefriersensitiven und fließfähigen Schlickers bestehend aus oder umfassend Wasser und (i) Mullitpartikel, (ii) kolloidal dispergierte Siliziumdioxidpartikel sowie vorzugsweise (iii) Aluminiumoxidpartikel sowie optional umfassend (iv) weitere keramische Bestandteile und/oder (v) weitere nicht-keramische Bestandteile – Bereitstellen einer Gussform, – Einfüllen des Schlickers in dder Gussform, so dass ein Vorkörper entsteht – Trocknen des Vorkörpers und – Sintern des getrockneten Vorkörpers, so dass Siliziumdioxidpartikel ganz oder teilweise unter Bildung von Mullit umgesetzt werden und der feuerfeste keramische Formkörper entsteht. Beschrieben werden auch entsprechende Formkörper und deren Verwendung als Brennhilfsmittel. A process is described for producing refractory ceramic moldings comprising at least 60% by volume of mullite, based on the total mass of the refractory ceramic molded body, with the following steps: providing or producing a freeze-sensitive and flowable slip consisting of or comprising water and (i) mullite particles , (ii) colloidally dispersed silicon dioxide particles and preferably (iii) aluminum oxide particles and optionally comprising (iv) further ceramic components and / or (v) further non-ceramic components - providing a casting mold, - filling the slip into the casting mold, so that a preform arises - drying of the preform and - sintering of the dried preform, so that silicon dioxide particles are wholly or partly reacted to form mullite and the refractory ceramic molded body is formed. Corresponding moldings and their use as kiln furniture are also described.

Method for the production of a ceramic product with oriented particles

A kind of molding method of ceramics 3D printing

本发明提出一种陶瓷3D打印成型的方法，由3D打印工艺形成宏观陶瓷层状结构，每层陶瓷层中具有微观层状结构，在微观层与微观层的界面之间和陶瓷层界面之间为棒状陶瓷晶层。本发明通过3D打印技术制备高性能层状陶瓷材料，首先通过3D打印形成宏观层状结构，然后采用逐层冷冻控制，在每一宏观层中形成微观的薄层结构，同时使层界面之间由于水结晶形成锯齿状微冰晶结构，促进坯体层间紧密结合，确保了层状陶瓷良好的烧结性，这种层状结构可大幅提升陶瓷材料力学性能，并充分发挥层状陶瓷独特的能量耗散结构优势，克服陶瓷突发断裂的致命缺点，大大提高陶瓷材料使用可靠性。

Method of making a refractory article

A method of making a refractory article is provided. The method includes: a) mixing a binder system, a refractory charge, and a second colloidal binder to form an aqueous slurry; b) casting the aqueous slurry into a mold; c) subjecting the mold containing the aqueous slurry to a temperature that is lower than a slurry casting temperature for a time sufficient to form a green strength article; and d) firing the green strength article at a temperature of at least 450° C. for a time sufficient to achieve thermal homogeneity, thereby forming a refractory article. Refractory articles made in accordance with the method have a unique combination of pore structure and mechanical properties.

Compressed bone composition and methods of use thereof

The present disclosure relates to compressed bone compositions, bone implants, and variants thereof. The present disclosure also relates to methods of preparing compressed bone compositions, bone implants, and variants thereof. The present disclosure also relates to methods of using the bone compositions, bone implants and variants thereof.

A kind of preparation method of fast demoulding flexible clay facing tile

本申请公开了一种快速脱模柔性饰面砖的制备方法，将原料按一定的比例均匀混合成浆料，在模具中成型，先短暂烘干，然后放入低温条件下进行冻干、脱模，再自然晾干，制得柔性饰面砖。本发明制备的饰面砖能够在极短时间内脱离模具成型，并且制得的成品性能指标达到国家标准，本发明采用的组合防冻剂可以在低温条件进行快速冻干并进行快速脱模，大大提高了生产效率，降低了能耗与生产成本，具有广泛市场推广应用前景。

Porous ceramic material and method of producing the same

Provision of a porous ceramic material which rapidly induces bone tissue formation and has practical strength. A porous ceramic material 11 having substantially unidirectionally oriented pores 12, a porosity of 40 - 90%, and an average open area of one pore of 0.05×10 -3 - 50×10 -3 mm 2 both in a first sectional surface perpendicular to the pore 12 orientation direction and a second sectional surface parallel to the first sectional surface and 5 mm distant from the first sectional surface in the pore 12 orientation direction. Using the material 11, when a cylindrical test piece (diameter 3 mmxheight 5 mm, the pore 12 array direction as a height direction) made of the material is dipped in polyethylene glycol up to 1 mm from one end thereof, polyethylene glycol permeates through the whole test piece preferably within 30 seconds.

Aqueous gelcasting method for ceramic products

The present disclosure relates to the manufacture of ceramic products by aqueous gelcasting. Exemplary ceramic products include sanitary ware, such as toilets and sinks. The process includes a slurrying step, a mixing step, a molding step involving aqueous gelcasting, a drying step, a glazing step, and a firing step.

金属酸化物発泡体をベースとするガスセンサ装置

ガス感知装置は、ガス感知用途のために、大きい表面積の三次元的に接続された金属酸化物発泡体構造と、三次元多孔質構造内の細長いチャネル孔とを備えて製造される。これにより、感知層の表面積を増加させ、感度およびセンサ応答を促進する。ガスセンサ装置は、低温同時焼成セラミック基板上に印刷されたプラチナ電極およびルテニウムヒータに銀ペーストを介して取り付けられる、製作された金属酸化物発泡体感知材料を含む。この装置は、改良された感度および応答時間を伴う改良されたガス感知性能を提供し得る。金属酸化物発泡体感知材料を含むガスセンサは、エタノールや一酸化炭素などの有毒ガスに対してより高い感度を示す。これは、増加された化学反応場を提供する多孔質三次元構造から達成されるより大きな表面積、およびガスを容易に通過させることが可能でありガス拡散反応経路を短くするより大きな多孔質チャネルに起因する。

Method for creating ice structures

A method for building an ice structure includes making a plurality of ice logs and attaching the ice logs together to form a support structure. The support structure may be two or more stories high and may be constructed by freezing the ice logs together.

Method for creating ice structures

A method for building an ice structure includes making a plurality of ice logs or ice beams and attaching the ice logs together to form a support structure. The support structure may be two or more stories high and may be constructed by freezing the ice logs or ice beams together.

Bidirectional freeze casting for fabricating lamellar structures

This disclosure provides systems, methods, and apparatus related to freeze casting. In one aspect, a method comprises providing an apparatus. The apparatus comprises a container and a cooling surface. A bottom of the container comprises a wedge. The wedge comprises a first substantially planar surface and a second substantially planar surface with an angle between the first and the second substantially planar surfaces. An interior bottom of the container comprises the second substantially planar surface. The cooling surface is in contact with the first substantially planar surface. A slurry is deposited on the second substantially planar surface, the slurry comprising a plurality of particles in a liquid. The cooling surface is cooled to cool the slurry at a specified cooling rate.

Compressed bone composition and methods of use thereof

Dental implant body and method for manufacturing dental implant body

A dental implant body includes a ceramics sintered body, and the ceramics sintered body is a porous body having blind/continuous holes formed from a surface of the ceramics sintered body and walls formed by the blind/continuous holes. The porosity of the blind/continuous holes may be 50±10%. Further, the diameter of the blind/continuous hole may be equal to or greater than 50 μm and equal to or smaller than 190 μm.

Sistema e método de resfriamento de molde para fabricação de peças cerâmicas por freeze-casting

a presente invenção provê um sistema de desmoldagem de peças cerâmicas fabricadas por freeze-casting compreendendo um molde (9), em que o molde (9) compreende uma abertura superior (95) e uma abertura inferior (94), em que a abertura superior (95) é adaptada para receber uma suspensão coloidal (92), e uma das aberturas é adaptada para permitir a passagem de uma peça cerâmica fabricada (92), em que o sistema compreende pelo menos um elemento desmoldante principal (80) adaptado para atuar uma peça cerâmica fabricada (92) através de uma abertura do molde (9). em adição, a invenção provê um sistema de resfriamento de molde para fabricação de peças cerâmicas por freeze-casting que compreende: uma fonte (1) de gás de resfriamento; um meio de resfriamento de gás (7) de resfriamento conectado fluidicamente à fonte (1) de gás de resfriamento; e uma célula de resfriamento (5), conectada fluidicamente ao meio de resfriamento de gás (7) de resfriamento, compreendendo um molde (9) em seu interior, em que a célula de resfriamento (5) compreende uma abertura de injeção de gás de resfriamento refrigerado. assim, também é provido um método de resfriamento de molde para fabricação de peças cerâmicas por freeze-casting que compreende as etapas de: refrigerar um gás de resfriamento provindo de uma fonte (1) de gás de resfriamento; e injetar um gás de resfriamento refrigerado em uma célula de resfriamento (5) que compreende um molde (9) em seu interior.

sistema de desmoldagem de peças cerâmicas fabricadas por freeze-casting, e sistema e método de resfriamento de molde para fabricação de peças cerâmicas por freeze-casting

a presente invenção provê um sistema de desmoldagem de peças cerâmicas fabricadas por freeze-casting compreendendo um molde (9), em que o molde (9) compreende uma abertura superior (95) e uma abertura inferior (94), em que a abertura superior (95) é adaptada para receber uma suspensão coloidal (92), e uma das aberturas é adaptada para permitir a passagem de uma peça cerâmica fabricada (92), em que o sistema compreende pelo menos um elemento desmoldante principal (80) adaptado para atuar uma peça cerâmica fabricada (92) através de uma abertura do molde (9). em adição, a invenção provê um sistema de resfriamento de molde para fabricação de peças cerâmicas por freeze-casting que compreende: uma fonte (1) de gás de resfriamento; um meio de resfriamento de gás (7) de resfriamento conectado fluidicamente à fonte (1) de gás de resfriamento; e uma célula de resfriamento (5), conectada fluidicamente ao meio de resfriamento de gás (7) de resfriamento, compreendendo um molde (9) em seu interior, em que a célula de resfriamento (5) compreende uma abertura de injeção de gás de resfriamento refrigerado. assim, também é provido um método de resfriamento de molde para fabricação de peças cerâmicas por freeze-casting que compreende as etapas de: refrigerar um gás de resfriamento provindo de uma fonte (1) de gás de resfriamento; e injetar um gás de resfriamento refrigerado em uma célula de resfriamento (5) que compreende um molde (9) em seu interior.