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6829908 Fabrication of inclusion free homogeneous glasses  
The present invention relates to a method for forming an optical blank. The method includes providing a green body that has a non-porous exterior portion and a porous interior portion. The interior...
EP0292179B2 Method for producing ultra-high purity, optical quality, glass articles  
Abstract of EP0292179 A method for producing ultra-high purity, optical quality, glass articles is disclosed which involves: 1) forming a gel from a silicon-containing organic compound, such as,...
5866062 Process for producing shaped bodies of silicon dioxide  
A shaped body of amorphous silicon dioxide, which has a chemical purity of at least 99.9% and a cristobalite content of at most 1% and which is impermeable to gas, is known. To provide shaped...
5674792 Shaped body having a high silicon dioxide content and a process for producing such shaped bodies  
A shaped body of amorphous silicon dioxide, which has a chemical purity of at least 99.9% and a cristobalite content of at most 1% and which is impermeable to gas, is known. To provide shaped...
EP0517841B1 PROCESS FOR MAKING NON-POROUS, MICRON-SIZED HIGH PURITY SILICA  
Abstract not available for EP0517841
5370852 Primary particles of amorphous silica composite material, secondary particles of amorphous silica composite material, shaped bodies thereof and processes for their preparation  
The invention provides: primary particles of amorphous silica composite material, characterized in that they are composed of numerous granular amorphous silica particles randomly attached to...
5352645 Silica microspheres, method of improving attrition resistance and use  
High-strength, non-agglomerated uniform porous microspheres of silica produced by spray drying a mixture comprising a colloidal silica sol and an additive selected from ammonium citrate or urea; an...
EP0352027B1 Process for producing pure and dense amorphous synthetic silica particles  
Abstract of EP0352027 A method of producing pure and dense amorphous fused synthetic silica. Silica of desired purity is wet pelletized or agglomerated to form particles having an average particle...
5252526 Insulating refractory  
A refractory mix for forming high strength, low thermal conductivity refractory shapes comprising from about 40 to 75% by weight of at least one dense refractory aggregate, about 10 to 30% by...
5145578 Packing material for liquid chromatography  
A packing material for liquid chromatography, comprising a spherical clay mineral powder which comprises a naturally occurring or synthetic water-swellable clay mineral, a clay mineral having...
5128114 Silica microspheres, method of improving attrition resistance  
High-strength, non-agglomerated uniform porous microspheres of silica produced by spray drying a mixture comprising a colloidal silica sol and an additive selected from ammonium citrate or urea; an...
EP0264268B1 Hydrophobic inorganic structures  
Abstract of EP0264268 Three dimensional hydrophobic substantially inorganic porous structure comprises a myriad of cavities interconnected by holes in which the diameters of the cavities are in...
5063179 Process for making non-porous micron-sized high purity silica  
A process for making non-porous, dense, silica partices having a diameter of about 3 to 1000 microns, a nitrogen B.E.T. surface area less than about 1 m 2 /g, a total impurity content of less than...
5030433 Process for producing pure and dense amorphous synthetic silica particles  
A method of producing pure and dense amorphous fused synthetic silica. Silica of desired purity is wet pelletized or agglomerated to form particles having an average particle size of between about...
EP0352027A2 Process for producing pure and dense amorphous synthetic silica particles.  
A method of producing pure and dense amorphous fused synthetic silica. Silica of desired purity is wet pelletized or agglomerated to form particles having an average particle size of between about...
4888309 Hydrophobic, highly porous, three-dimensional inorganic structures  
Three dimensional hydrophobic substantially inorganic porous structure comprises a myriad of cavities interconnected by holes in which the diameters of the cavities are in the range of from 0.5 to...
EP0264268A2 Hydrophobic inorganic structures.  
Three dimensional hydrophobic substantially inorganic porous structure comprises a myriad of cavities interconnected by holes in which the diameters of the cavities are in the range of from 0.5 to...
4600646 Metal oxide stabilized chromatography packings  
Surface-stabilized porous silica having discontinuous metal oxide layer over the silica, chromatographic packings based on the metal-stabilized silica and processes for their preparation, are...
4138336 Thin layer chromatographic plates  
A thin layer chromatographic plate housing a substrate and bonded there to a layer of discrete, spherical inorganic metal oxide particles bonded to the substrate by an inorganic metal oxide binder...
4132560 Pigmented microporous silica microspheres  
Pigmented silica microsphere having an average diameter from 2 μm to 100 μm and consisting essentially of from 10% to 70% by weight of particulate pigment, dispersed throughout a microporous...
4131542 Spray dried silica for chromatography  
A process for preparing a low-cost silica packing for chromatography is disclosed. The process involves spray-drying an aqueous silica sol containing from 5 to 60 weight percent silica, to form...
4011096 Vesiculated silica microspheres  
Vesiculated silica microspheres having an average diameter from 0.5μ to 50μ, a maximum vesicle diameter less than 50μ and a volume of vesicles from 5 to 95% of the total volume of the...
4010242 Uniform oxide microspheres and a process for their manufacture  
Oxide microspheres having a diameter in the 0.5 to 20 micron range are produced by forming a mixture of urea or melamine and formaldehyde in an aqueous sol containing colloidal oxide particles....
3728436 METHOD OF OBTAINING SILICON MONOXIDE  
A method for obtaining silicon monoxide comprising mixing finely divided polycrystalline silicon particles with amorphous silicon dioxide in a molar ratio of polycrystalline silicon particles to...
3497367 OPALINE MATERIALS AND METHOD OF PREPARATION  
3488723 ACOUSTICAL MATERIAL FOR HIGH TEMPERATURE APPLICATION  
3465811 PLANTS FOR THE CONTINUOUS CASTING OF STEEL  
3459503 HOT PRESSING TITANIUM DIOXIDE  
Matches 1 - 28 out of 28