Matches 101 - 150 out of 163 < 1 2 3 4 >

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5059584 Method for hot isostatic pressing a ceramic article  
A method for treating a ceramic article by hot isostatic pressing provides for the placement of the ceramic article in a capsule with an oxygen donor which is separated from the ceramic article by...
5045269 Method for sintered shapes with controlled grain size  
A method for producing sintered shapes of refractory powders with improved strength and toughness using a grain growth inhibiting powder to inhibit grain growth.
5043119 High strength particulate ceramics  
This invention relates to new and useful hard, dense, composite materials made from metallic nitrides such as titanium nitride when combined with aluminum oxide and aluminum nitride and a process...
4996119 Speaker cone plate and method of forming  
A speaker cone plate is provided with an inorganic surfacial hard layer formed at least on a face of a metal substrate and is subjected to a reinforcing treatment by hot isostatic pressing,...
4965027 Method for the freeze-pressure molding of inorganic powders  
The present invention is concerned with a method of molding inorganic powders, primarily ceramic powders, in which a binder fluid having a specific freezing point, typically water, is added to the...
4940843 Method of producing non-oxide ceramic sintered bodies  
A non-oxide ceramic sintered body is produced by calcining, before sintering, a non-oxide ceramic shaped body in an atmosphere having a particular partial oxygen pressure.
4889833 Granular inorganic moldings and a process for production thereof  
Inorganic granules are characterized in that when the maximum extent of a granule is termed D and the dimension perpendicular to the maximum extent has a maximum extent termed A, A/D is 0.5 to...
4849639 Luminescent ceramic plates  
A ceramic plate capable of luminescing under electron X-ray or other ionizing radiation comprises a fine powder bound in water glass such as sodium or potassium hydroxy silicates, or sodium or...
H000522 Method of forming ceramic bricks  
A method for forming free standing ceramic bricks for use as tritium breeder material is disclosed. Aqueous solutions of sodium carbonate and potassium carbonate are mixed with an organic...
4744943 Process for the densification of material preforms  
A process for preparing dense, consolidated bodies, the process comprising compressing in a forging press an isostatic die assembly, the assembly comprising a preform surrounded by a fluid...
4731207 Method for manufacture of high-frequency dielectric ceramics  
A dielectric ceramics possessing a high level of unloaded Q and low loss at high frequency beneficial for communications at high frequency is produced by a method which comprises heating a green...
4708838 Method for fabricating large cross section injection molded ceramic shapes  
A method for fabricating large, greater than one centimeter cross section, high density silicon nitride by injection molding process has been developed. The method requires use of a controlled...
4698319 Densified composite containing one or more interwoven matrix compositions  
A densified composite is disclosed which comprises one or more substantially interwoven matrix compositions, which have been densified either during formation of the interwoven matrix composition...
4693988 Single phase silicon carbide refractory  
The present invention provides a method of pressureless sintering silicon carbide in which the silicon carbide starting material is in the form of a multimodal composition, or mixture, of coarse...
4647414 Method of manufacturing ceramics  
Disclosed herein is a method of manufacturing ceramics, which comprises the steps of: applying a film of an elastic material on a ceramic shaped body and hydrostatically pressing the resulting...
4596781 Tough Si3 N4 composite ceramics  
A tough Si3 N4 ceramic composite is provided by incorporating a ternary oxide additive containing hafnia, titania and zirconia. The ternary oxide additive consists essentially of 60 to 85 mole...
4571312 Preparation of yttria-gadolinia ceramic scintillators by sintering and gas hot isostatic pressing  
Sintering and gas hot isostatic pressing are used to prepare polycrystalline yttria-gadolinia ceramic scintillator bodies. Multicomponent powder compacts, formed by cold pressing and cold...
4569922 Silicon carbide-aluminum nitride sintered article and process for its production  
A silicon carbide sintered article composed essentially of elongated and/or plate-like grains of a SiC-AlN solid solution consisting essentially of from 2 to 20% by weight of Al, from 0.2 to 10%...
4560668 Substantially pore-free shaped articles of polycrystalline silicon carbide, and a process for their manufacture by isostatic hot-pressing  
The invention is substantially pore-free shaped articles consisting essentially of polycrystalline silicon nitride and polycrystalline silicon carbide in the form of a homogeneous microstructure...
4526875 Ceramic material for cutting tools and process for the production thereof  
Ceramic materials for cutting tools are described, comprising molding a powder mixture comprising (a) Al2 O3, (b) TiN, and (c) at least one of ZrC, Zr, and ZrN, wherein component (a) constitutes...
4518398 Manufacturing process for sintered ceramic body for cutting tools  
A sintered ceramic body for cutting tools having a residual porosity of not exceeding 0.2% by volume and mean crystal grain size of not exceeding 2μ is obtained by sintering a mixture...
4515741 Method for making ambidirectional pressed ceramic slip-on support for a towel bar  
A support and method for making same is disclosed for use in supporting towel bars. The support is made of pressed ceramic material and is a slip-on support which is ambidirectional such as to be...
4496503 Method of making a densified silicon nitride/oxynitride composite  
A method of making a densified silicon nitride/oxynitride composite is disclosed. The method comprises: (a) shaping a substantially homogeneous powder mixture of silicon nitride, 6-18% yttrium...
4473518 Process for preparing a phosphor  
A process for preparing a rare earth oxide type phosphor comprises compressing a starting mixture composed essentially of a matrix material for said rare earth oxide type phosphor, an activator...
4430279 Process for producing zirconia yttria grinding media used for grinding magnetic coating powder  
This invention discloses zirconia-containing grinding media in the preparation of magnetic disc coating and method for producing such grinding media. The grinding media essentially consists of...
4310480 Process for fabrication of dense-structure refractories which have resistance to spalling  
A process by which dense structure refractories that have resistance to spalling may be produced which comprises building up secondary particulates from fine and/or ultra-fine particles of primary...
4303447 Low temperature densification of zirconia ceramics  
Addition of from about 1.0 to about 15% by weight of a vanadium oxide or boric oxide promoter to a zirconia (ZrO2) powder promotes rapid densification at temperatures below about 1300° C. For...
4297309 Process of using and products from fume amorphous silica particulates  
Amorphous silica particulates, known as fume silica, which are generally spherical and of small particle sizes, are recovered from the stack gases issuing from an electric furnace producing...
4271109 Method of manufacturing a ceramic article  
Scrap glass is crushed and mixed with selected quantities of ball clay and wollastonite, the resulting raw-mix is press-molded into a green compact, and the latter is fired in air at a temperature...
4221596 Method for low pressure forming of fused silica compositions and resultant bodies  
A method for forming contoured refractory bodies characterized by a low coefficient of expansion, high flexural strength and resistance to thermal shock, wherein a fused silica material is pressed...
4165226 Process for preparing an element of a dual-in-line ceramic package provided with a layer of sealing glass  
An element of a dual-in-line ceramic package such as a substrate or cover provided with a layer of sealing glass is prepared by forming powdered low-melting sealing glass into a shape conforming...
4134946 Process for briqueting fluorspar with sodium carbonate  
Fluorspar is formed into briquettes by thoroughly mixing fluorspar ore with water and an agglomerating agent, for example sodium carbonate, pressing the mixture and calcining the pressed product.
4017577 Hot pressing of reaction sintered CaB6  
A method for the production of high density compacts of calcium hexaboride omprising the gradual heating of stoichiometric quantities of calcium oxide and boron powder to a temperature of...
4009238 Process for the production of ceramic substrates for thin layer circuits  
A process for the production of ceramic substrates for thin layer circuits utilizes a cast compound which may be transformed into a ceramic body by sintering. The compound is poured out in the...
4001364 Method for improving the physical properties of ceramics  
A method of improving the physical properties, such as workability and impact strength, of ceramics, wherein particles of ceramics are coated with atactic polypropylene, subsequently formed into...
3956440 Production of fine grained ferrite bodies  
The small dimension (inferior to one micrometer) of the grains of oxydes obtained by chemical precipitation is retained during the processing of the ferrimagnetic part through precise...
3949032 Temperature stable ferrite FM tuning core  
A ferrite FM tuning core and a method of producing it. The ferrite tuning core is physically and electrically interchangeable with a powdered iron FM tuning core but exhibits a substantially lower...
3941604 Fast-firing ceramic composition and ceramic article made therefrom  
Scrap glass is crushed and mixed with selected quantities of ball clay and wollastonite, the resulting raw-mix is press-molded into a green compact, and the latter is fired in air at a temperature...
3835210 METHOD OF FORMING POWDER COMPACTS  
A mass of powder particles is enclosed within a soft elastomeric container and placed in a die cavity with a hard elastomeric sealing member placed between the soft elastomeric container and a...
3783155 SINTERED CUPRIC OXIDE MASSES  
Compacted, sintered cupric oxide masses are disclosed. The masses are prepared from copper oxide powder under high pressure followed by heating at high temperatures. Various regions of the mass...
3622313 HOT ISOSTATIC PRESSING USING A VITREOUS CONTAINER  
Hot compacting of metallic powders in a vitreous evacuated container of a predetermined shape corresponding to the shape of the densified object desired by subjecting the container to a...
3505158 COMPOSITE POROUS-DENSE CERAMIC ARTICLE  
3795724 METHOD OF MAKING ALUMINA REFRACTORY GRAIN  
3574645 TRANSPARENT THORIA-BASE CERAMICS CONTAINING Y203 AND METHOD FOR PRODUCING SAME  
3632710 USE OF ALUMINA ALONE OR WITH SILICA AS SINTERING AID FOR BORON CARBIDE  
3441636 MANUFACTURE OF SHAPED REFRACTORIES FROM DOLOMITE  
3429720 MATERIALS HAVING HIGH CORROSIVE RESISTANCE TO ATTACK BY FLUORINE AT CRYOGENIC TEMPERATURES AND METHOD OF PREPARING THEM  
3427174 HEAT-INITIATED PHOSPHATE-BONDED COMPOSITIONS  
3421948 METHOD OF MAKING MEMBRANES  
3365318 Low temperature burned refractory brick and method of making the same  
Matches 101 - 150 out of 163 < 1 2 3 4 >