Matches 101 - 150 out of 307 < 1 2 3 4 5 6 7 >
Match Document Document Title
5231062 Transparent aluminum oxynitride-based ceramic article  
This invention provides a transparent aluminum magnesium oxynitride ceramic, wherein greater than 0.5 weight percent of the total ceramic composition is magnesium oxide. The ceramic article of the...
5229340 Manufacture of MgO-based β"-alumina sintered bodies  
A process for manufacturing MgO-based β"-alumina sintered bodies from a starting powder comprising an MgO-based β"-alumina as a main ingredient, through shaping and firing, in which process...
5227348 Self-supporting ceramic bodies with altered microstructures  
This invention relates to a method for producing a self-supporting ceramic structure comprising an oxidation reaction product of a parent metal and a vapor-phase oxidant characterized by an altered...
5225380 Phosphate ceramic hard tiles  
Calcium aluminum magnesium phosphate ceramic hard tiles and processes for them are described. The tiles have a density in excess of about 110 pounds per cubic foot, a curl value less than about 20...
5214011 Process for preparing ceramic-metal composite bodies  
A process is presented for the fabrication of a metal/ceramic composite by a non-vapor phase oxidation of a molten metal by contacting said molten metal at an elevated temperature with a...
5206193 High purity fused grain in the system Al.sub.2 O.sub.3 -Cr.sub.2 O.sub.3 -MGO  
High purity fused grain and refractory compositions that contain a high purity fused grain made up of 35 to 85 wt. % chromia, 5 to 55 wt. % alumina, and 5 to 45 wt. % magnesia. Burned refractory...
5206190 Dielectric composition containing cordierite and glass  
A glass-ceramic composition for forming a glass-ceramic dielectric body having a dielectric constant of less than about 4.5, a firing temperature of less than about 950° C. and a sintered density...
5196143 Mixed metal hydroxide-clay adducts as thickeners for water and other hydrophylic fluids  
Novel compositions useful as fluid gelling agents, especially for use in subterranean applications such as drilling fluids, are prepared by reacting an aqueous dispersion of a clay, such as...
5177033 Sintered body of light transmitting cordierite and a method of preparing the same  
A light transmitting sintered body of cordierite has a composition equal or close to the stoichiometric composition of cordierite which is represented as 2MgO.2Al 2 O 3 .5SiO 2 , consists mainly...
5175132 Sinterable ceramic compositions  
Hard crystalline sintered ceramic products, and a method for making them at substantially reduced sintering temperatures, are disclosed, the products being manufactured by the sintering of mixtures...
5173455 Low sintering cordierite powder composition  
A Group IIA metal-Group IIIA metal-silicon substantially homogeneous liquid alkoxide is prepared from a reaction mixture of a Group IIA metal, a Group IIIA metal, a silicon tetraalkoxide, and a...
5166107 Process for preparation of anorthite sintered body  
Disclosed is a process for the preparation of an anorthite sintered body, which comprises preparing a formed body of at least one powder selected from the group consisting of (i) a calcium type...
5158915 Magnesia-based sintered body and process for preparing same  
A magnesia-based sintered body of a homogeneous composition having a porosity lower than 1% and a hydrateability lower than 0.3%, said sintered body having a chemical composition comprising 70 to...
5141686 Method for producing cordierite articles  
A method of preparing a precursor or cordierite-forming particulate raw material mixture is improved upon by characterizing the talc particles utilized in the raw material mixture in accordance...
5141902 Composite ceramic structures  
A self-supporting ceramic composite body produced by a method which comprises preparing a polycrystalline material as the oxidation reaction product of a parent metal with a vapor-phase oxidant,...
5139976 Cordierite composition and method of production  
A Group IIA metal-Group IIIA metal-silicon substantially homogeneous liquid alkoxide is prepared from a reaction mixture of a Group IIA metal, a Group IIIA metal, a silicon tetraalkoxide, and a...
5114644 Fabrication of cordierite bodies  
A body is disclosed which is at least about 90% by weight cordierite, has a mean pore size of less than about 10.0 microns, and a coefficient of thermal expansion of no greater than about 9.0×10...
5096642 Process for producing a high density ceramic of perovskite  
A process for producing a high density ceramic of perovskite represented by the formula: ABO 3 wherein A is one or more metal elements coordinated with 12 oxygen atoms, and B is one or more metal...
5089456 Process for preparing cordierite  
A process for preparing a cordierite, which includes dissolving a silicon compound, an aluminum compound and a magnesium compound in a molar ratio of 1:0.7 to 1:0.3 to 0.5 in a complexing agent...
5081082 Production of alumina ceramics reinforced with β'"-alumina  
A process for producing strong alumina ceramics in which needle-shaped β'"-alumina grains are homogeneously distributed in an α-alumina matrix to provide an increase in bending strength, as...
5079064 Thermal shock resistant ceramic honeycomb structures of cordierite, mullite and corundum  
A ceramic honeycomb structure containing SiO 2 , Al 2 O 3 and MgO primarily in the form of cordierite, mullite and corundum having a compositional gradient in the direction of the channels of the...
5064790 High density cordierite ceramics from zeolite  
This invention relates to processes for preparing ceramic articles which are especially suited for electronic applications. The process involves taking a shaped article which has been formed from a...
5045514 Sol-gel method for making composite mullite/cordierite ceramics  
A method for making composite mullite/cordierite ceramics comprises the steps of: preparing a mullite-intensive sol by mixing alumina and silica sols together at an Al 2 O 3 /SiO 2 molar...
5043305 High thermal expansion coefficient ceramic sinter and a composite body of the same and metal  
The ceramic sinter is composed of a metal oxide such as ZrO 2 and 10-90 vol. % of metal fluoride which is selected from the group having not less than 2.5 electronegativity difference between...
5030592 Highly dense cordierite and method of manufacturing same  
Compositionally triphasic nanocomposite gel is made by mixing two or more sols of ceramic precursor oxides. Such gel is then dried and ground to a fine powder which is pressed into compact bodies....
5021373 Porous cordierite compositions with improved thermal expansion characteristics  
Cordierite compositions having increased porosity and improved thermal expansion characteristics are disclosed. The cordierite compositions comprise from about 0.025 to about 1.5 percent by weight...
5019541 Method for producing self-supporting ceramic bodies with altered microstructures  
This invention relates to a method for producing a self-supporting ceramic structure comprising an oxidation reaction product of a parent metal and a vapor-phase oxidant characterized by an altered...
5017533 Method for in situ tailoring the metallic component of ceramic articles  
There is disclosed a method for producing a self-supporting ceramic body by oxidation of a molten precursor metal with a vapor-phase oxidant to form an oxidation reaction product and inducing a...
5006490 Method for the formation of refractory products from and disposal of asbestos  
A method of physically and chemically altering asbestos which comprises mixing the asbestos with a selected metal and reacting the mixture to form an end product including slag, in which the...
4990475 Alumina-spinal monolithic refractories  
An alumina-spinel monolithic refractory consists essentially of 50-90 percent by weight of alumina clinker, 5-40 percent by weight of MgO--Al 2 O 3 spinel clinker not larger than 1 mm in size and...
4973566 Cordierite material useful in a heat source retainer and process for making the same  
A porous cordierite ceramic and a process for making the same are provided by the present invention. Preferably, the ceramic material includes at least about 95 percent cordierite in the crystal...
4971934 Refractory composition  
A refractory brick for use in rotary cement kilns has improved properties by the addition of small quantities of MnO 2 to the composition used to form the brick.
4965228 Gelation of aluminum solutions using magnesium oxide  
A process is described for making shaped aggregates by mixing the material to be shaped with an aluminum solution and magnesium oxide. The magnesium oxide provides a delayed but strong gelating...
4957554 Dimensionally-controlled ceramics  
A moldable composiion comprising a mixture of magnesia, alumina, and silicon carbide powders or agglomerates thereof, the powders having an overall average size of at most 5.0 micrometers,...
4950628 Material and process to produce low thermal expansion cordierite structures  
The present invention is directed toward the improvement of the properties of cordierite sintered structures. The improvement consists essentially of heat treating the calcined kaolin component...
4935285 Ceramic substrates for microelectronic circuits and process for producing same  
A ceramic substrate for densely integrated semiconductor arrays which is superior in a coefficient of thermal expansion, dielectric constant, strength of metallized bond, and mechanical strength,...
4931354 Multilayer printed circuit board  
A multilayer printed circuit board comprises plural insulating layers integrated into one body, and internal wiring conductor layers located on the internal insulating layers, characterized in that...
4923832 Method of making shaped ceramic composites with the use of a barrier  
In the present invention, there is provided a method for producing a self-supporting ceramic or ceramic composite body by the oxidation of a parent metal to form a polycrystalline ceramic material...
4920084 Forming refractory masses and composition of matter for use in forming such refractory masses  
In processes of forming a refractory mass on a surface, a mixture of refractory particles and oxidizable particles which react exothermically with oxygen to generate sufficient heat to soften or...
4913840 Production of stable anionic sols containing colloidal alumina hydrate  
Stable alkaline sols of anionic alumina hydrate may be made by calcining alumina trihydrate and milling the monohydrate produced under alkaline conditions. Alkaline sols containing both anionic...
4901983 Blast pipe for metallurgical processes having refractory coated surfaces  
A high-temperature resistant blast pipe is primarily intended for delivering gas, such as oxygen, and, when appropriate, solid material to metallurgical processes, and incorporates a layer of...
4898842 Organometallic-derived cordierite and other compounds comprising oxides of silicon  
The present invention provides a method of synthesizing amorphous cordierite-forming glasses from organometallic precursors. Either the sol-gel/β-diketonate technique or the amorphous chelating...
4888314 Low-temperature sinterable cordierite type ceramic powder, preparation process and ceramic composition produced by sintering this powder  
The present invention relates to a cordierite (2MgO.2Al 2 O 3 .5SiO 2 ) type ceramic powder sintering at low-temperature defined in that its composition is: 60 to 50% SiO 2 , 5 to 20% MgO and 20...
4871693 Porous cordierite ceramics  
New type porous cordierite ceramics having a new characteristic interconnecting open cellular structure and a hollow microspherical cordierite glass powder with a shell devoid of any pores or...
4859640 Method of making ceramic composite articles with shape replicated surfaces  
A method for producing a self-supporting ceramic composite body having a negative pattern which inversely replicates the positive pattern of a parent metal precursor having thereon a positive...
4855259 Process of making ceramic moldings containing cordierite  
Ceramic moldings containing finely crystalline cordierite are described, which are obtainable by the intensive grinding of precrystallized cordierite powder, mixing the powder with second additive...
4853354 Mixed lanthanum-magnesium aluminates and lasers using monocrystals of these aluminates  
These lasers in particular have two flashlamps (30, 32) for longitudinally pumping a monocrystalline aluminate bar (28) emitting in the visible and near infrared, two mirrors (38, 40) for...
4851376 Cordierite ceramic body having low thermal expansion coefficient, process for producing the same, and method of evaluating cordierite composition  
A process for producing a cordierite ceramic body by using a reclaimed cordierite composition for a cordierite ceramic article which has a composition similar to that of the cordierite ceramic...
4843045 Process of making ceramic composites with improved thermal shock resistance  
A high density, shock resistant ceramic comprising from 1 to about 4 mols of a dense spinel ceramic matrix having dispersed therein, 1.5 to 1, respectively, of a metal oxide derived from a...
4837187 Alumina-based core containing yttria  
A ceramic core for use in the investment casting of metals includes, prior to sintering, about 80 w/o to about 86 w/o of a ceramic filler material and about 14 w/o to about 20 w/o of a binder...
Matches 101 - 150 out of 307 < 1 2 3 4 5 6 7 >