Matches 251 - 300 out of 496 < 1 2 3 4 5 6 7 8 9 10 >
Match Document Document Title
4878947 Method for manufacture of porous refractory articles  
The alkali metal content of unfired porous ceramic shapes is substantially reduced by treatment with water to remove excess alkali and treatment with a dilute aqueous solution of an ammonium salt,...
4873207 Ceramic aggregate for roadway composition and method of producing same  
A ceramic aggregate for concrete is made from a mixture of clay and dried organic garbage in a ratio of about three parts by volume of organic garbage to about one part by volume clay. The mixture...
4866011 Process for forming a ceramic foam  
The present invention relates to a ceramic foam material, preferably a ceramic foam filter, prepared by providing an open cell flexible foam having a plurality of interconnected voids surrounded by...
4855265 High temperature low thermal expansion ceramic  
This invention relates to the high temperature stabilization of aluminum titanate and aluminum titanate-mullite compositions by the addition of iron oxide. It has been found that iron oxide...
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...
4833109 Low thermal conductivity magnesite-spinel brick and method  
A refractory mix for forming low thermal conductivity refractory shapes comprising about 50 to 90% by weight of magnesite, about 10 to 50% by weight spinel or about 7 to 35% by weight of an...
4833106 Fluid-permeable article and method for producing the same  
A fluid-permeable article which permits fluid to pass therethrough includes a porous ceramic structure having a multiplicity of hollow members made of ceramic material which are concatenated with...
4826789 Porous inorganic materials  
A particulate porous material suitable for use as a high surface area column packing material comprises particles substantially all of which are not smaller than 5 micrometers and not larger than 1...
4808558 Ceramic foams  
Ceramic foams in which the open cells are connected by a three-dimensional, substantially continuous ceramic matrix formed of interconnected hollow ligaments, are made from an open-cell,...
4794046 Implant material with continuous and two-dimensional pores and process for producing the same  
Disclosed herein are a highly strong implant material having continuous passages in the two-dimensional direction, which is a ceramic material of hydroxyapatite and is useful as the substitutive...
4792539 Process for producing clay derivatives having a porous structure and novel clay derivatives obtained by the process  
A novel process for producing clay derivatives having porous structure comprises hydrolyzing a metal alkoxide such as Al(OR) 3 , Ti(OR) 4 and Si(OR) 4 in which each R represents a linear or...
4780433 Insulating ceramic building material and method with fired clay and garbage mixture  
A ceramic composition to make cement with insulating properties is a mixture of cement, ceramic grog and ceramic aggregate beads, the ceramic grog and aggregate being a mixture of clay and dried...
4777152 Porous silicon carbide sinter and its production  
A porous silicon carbide sinter and its production process, the sinter consisting mainly of silicon carbide and having a three-dimensional network structure composed mainly of silicon carbide plate...
4770926 Hybrid fiber-reinforced plastic composite material  
A hybrid fiber-reinforced plastic composite material comprising a matrix of a plastic and hybrid fibers consisting of inorganic fibers and at least one kind of fibers selected from the group...
4769348 Fabrication of refractory insulating materials consisting essentially of a carbon matrix containing a dispersion of SiC- or Si.sub.3 N.sub.4 -lined voids  
A process for fabrication of refractory insulating materials wherein essentially pure silica shells are mixed with a polymeric graphite precursor dissolved in a solvent. The resulting slurry is...
4758538 Foamed ceramic body and process for production thereof  
A foamed ceramic body comprising at least 90% by weight of a ceramic composed of 60 to 80% by weight of SiO 2 , 5 to 15% by weight of Al 2 O 3 , 8 to 14% by weight of an alkali metal oxide, and 1...
4746341 Porous ceramic filter and process of producing the same  
A porous ceramic filter consisting of a planar porous support formed of a ceramic material, and a filtering layer formed of a fired mass of a ceramic powder integrally deposited on an upper surface...
4735922 Porous refractory hard metal compositions and method of forming same  
A porous refractory hard metal composition is disclosed which is formed by removing the metal compound from a substantially interwoven matrix composition comprising one or more refractory hard...
4724078 Porous material and tubular filter made of said material  
A porous material made from sintered inorganic particles. It has an open pososity of 30% to 40% by volume, a permeability to water at 20° ranging from 0.6 to 60 m 3 /h.m 2 .bar for a wall...
4721698 High porosity silicocalcareous mass  
A high porosity silicocalcareous mass is obtained by using in at least partial replacement of the usual silica, amorphous ultrafine synthetic silica particles having a specific surface between 150...
4708740 Technique for forming silicon carbide coated porous filters  
The present invention relates to a technique for forming silicon carbide coated porous filters for use in filtering molten metal, especially copper and copper alloy melts. The technique comprises...
4680230 Particulate ceramic useful as a proppant  
A two-phase ceramic particulate useful as a proppant in hydraulic fracturing operations is provided which comprises a vitreous matrix phase containing a crystalline alumina phase. The new ceramic...
4678758 Porous ceramic filter body and manufacturing method therefor  
Ceramic, porous filter body in the designed to overcome the lack of high temperature resistant thermoshock resistant and mechanical stable bodies for the filtration of metals, preferentially of...
4654314 Porous ceramic material and processes for preparing same  
A porous ceramic material composed of a sintered porous body of a calcium phosphate compound is described. A multiplicity of capillary void paths having a diameter of 1 to 30 μm and a multiplicity...
4640901 High temperature membrane  
The present invention concerns a method of making a silica-based membrane comprising the steps of: (1) pyrolyzing the material made of one of the class comprising polysilicone rubber, polysilane...
4631158 Shaped articles of silicate material, a process for their production and their use  
A process for the production of shaped articles from silicate material by extrusion and/or pelleting and subsequent annealing is described. In this process, pulverulent layered silicic acids of the...
4617280 Refractory lining and process for its manufacture  
Refractory lining for e.g. casting boxes comprising a refractory matrix and precipitated silica, the silica being precipitated in situ to form a structure, imparting to the material a volume weight...
4584280 Porous ceramic thin film and process for preparing the same  
A process for preparing a porous ceramic thin film which comprises applying an anhydrous solution containing an organometallic compound and a multifunctional organic compound to a substrate, and...
4574063 Method of forming glass or ceramic article  
Suspensions of particulate oxides, e.g., fumed silica, are prepared in non-aqueous media and the suspensions are used to cast shapes for glass or ceramic products. The suspensions are formed and...
4574003 Process for improved densification of sol-gel produced alumina-based ceramics  
The sol-gel process for forming dense, alumina-base ceramics, the process comprising 1. preparing a dispersion of aluminum oxide monohydrate containing a precursor of a modifying additive in the...
4572810 Method for providing uranium hydroxide on UO.sub.2 particles prior to generation of fugitive binder for sintering  
UO 2 particles are brought into contact with liquid water of low pH in an oxidizing environment to dissolve uranyl hydroxide from the particle surfaces and cause more uranyl hydroxide to form and...
4503093 Thermally sprayable ceramics  
Cordierite coatings capable of withstanding severe mechanical and thermal conditions. Methods of applying such coatings and components protected thereby.
4481124 Thermal shock resistant porous sound absorbing body  
A thermal shock resistant porous sound absorbing body having high durability in which the prior drawbacks of sound absorbing bodies have been obviated, is produced by sintering a mixture comprising...
4476187 Non-sintered quartz ware and method for producing the same  
In the method for manufacturing a non-sintered quartz ware the quartz and clay are comminuted and fully mixed to make a batch of raw materials. The batch is then added with an effective amount of...
4472512 Treatment of materials  
The present invention relates to the treatment of gel materials to remove water therefrom. The invention provides a process for removing water from a gel material by contacting the gel material...
4467041 Silicocalcareous mass with high porosity and its preparation  
A silicocalcareous mass with high porosity is obtained by using, in at least partial replacement of the usual silica, ultrafine synthetic silica with a large specific surface of 200 to 500 m 2 per...
4467040 Preparation and use of high porosity silicocalcareous mass  
A high porosity silicocalcareous mass is obtained by using in at least partial replacement of the usual silica, amorphous ultrafine synthetic silica particles having a specific surface between 150...
4451415 Method for manufacture of foamed ceramic article  
A foamed ceramic article is manufactured by adding hexagonally crystalline boron nitride as a foaming agent to a raw material formed preponderantly of a feldspar group mineral and sintering the...
4448914 Aqueous preparation and its use in the production of ceramic compositions  
An aqueous preparations of a gel-like consistency, containing (a) oils in quantities of from 0.03 to 30% by weight, (b) water-soluble or swellable vinyl polymers in quantities of from 0.2 to...
4409284 Porous moldings made of accumulated mass of stringy or thready extrudates  
The invention is concerned with a porous molding obtained by extruding a mixture containing at least one material selected from porous inorganic materials and carbonizable organic materials and at...
4396723 Lightweight silicate aggregate  
An improved process for the preparation of an expanded, water insoluble silicate aggregate. Anhydrous alkali metal silicate is hydrated in the presence of a curing agent, then is subjected to rapid...
4370285 Method of production of a lightweight building element  
A method of producing lightweight building blocks, in which an expandable or foamable ceramic material is charged into a mold, compacted and then fired with subsequent cooling.
4366253 Phosphate glass compositions, and glass-ceramic materials, and methods of making the same  
Phosphate glass compositions are described comprising from 8 to 35 wt % P 2 O 5 , from 8 to 48 wt % SiO 2 and GeO 2 , provided that the GeO content is not more than 6 wt %, from 3 to 18 wt % B 2 ...
4362651 High porosity catalysts  
The porosity of heterogeneous type catalysts is increased by incorporating during the preparation a short fibrous type material commonly referred to as a whisker. This type material is highly...
4343704 Ceramic foam filter  
The present invention resides in an improved ceramic foam filter particulary useful for filtering molten metal. The composition of the ceramic foam material is as follows: 50 to 70% Al 2 O 3 ; 2...
4340403 Ceramic honeycomb filter  
The disclosed ceramic honeycomb filter comprises a ceramic honeycomb structural body with a multiplicity of parallel channels extending therethrough, selected channels being sealed at one ends...
4338127 Addition and measurement of gases dissolved in molten metals  
Method and apparatus for measuring gases dissolved in molten metal. Also disclosed are method and apparatus for dissolving gases in molten metal and a method of forming a gas permeable but molten...
4320202 Inorganic elastic foamed products and method of the preparation thereof  
Elastic foamed products or articles having a much better heat resistance than that of the asbestos fiber foamed mass, prepared by drying of an aqueous fiber-dispersed slurry retaining bubbles and...
4298386 Calcium silicate and process for producing same  
Globular secondary particles of wollastonite group calcium silicate crystals represented by the formula lCaO.mSiO 2 .nH 2 O wherein 1≤l≤6, 1≤m≤6 and 0≤n≤1, characterized in that the...
4265659 Molten metal filter  
The present invention provides a highly efficient, ceramic foam material for filtering molten metal which is characterized by improved strength reliability. The filter of the present invention is...
Matches 251 - 300 out of 496 < 1 2 3 4 5 6 7 8 9 10 >