Matches 151 - 200 out of 457 < 1 2 3 4 5 6 7 8 9 10 >
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5277973 Carbon fibers having high strength and high modulus of elasticity and polymer composition for their production  
Silicon-containing carbide fibers having high strength and modulus of elasticity, and polymer compositions for production thereof. These fibrers are inexpensive and very useful as reinforcing...
5278110 SiC fibers having low oxygen content and methods of preparation  
A method of preparing preceramic SiC fibers having a very low oxygen content by forming fibers from a solution of a polycarbosilane and a vinylic sic precursor in a mutual volatile solvent, heating...
5276011 Method of manufacturing a component of the tape or filament kind out of a material based on a superconducting oxide having a high critical temperature, and a component obtained thereby  
A method of manufacturing a component of the tape or filament kind out of a material based on a superconducting oxide having a high critical temperature, wherein said material is formed while it is...
5273833 Coated reinforcements for high temperature composites and composites made therefrom  
The subject invention relates to a coated reinforcement material comprising a Si-containing reinforcement having a coating of the general formula: Al x O y N z wherein x is up to about 60...
5270112 Hybrid reinforcements for high temperature composites and composites made therefrom  
The subject invention relates to a hybrid reinforcement material comprising a refractory metal core having a first coating comprising aluminum, oxygen and nitrogen, this coating of the general...
5260011 Method of making refractory ceramic products and the products thereof  
The method of making refractory ceramic products in which a slurry is formed of water, powdered alumina, and amorphous fibers containing AL 2 O 3 and SiO 2 , the volume of water in the slurry...
5252525 Compositions for forming high temperature ceramic particulate filters  
A high temperature ceramic filter is produced from a composition containing refractory cement, aggregate, pore forming additives, and sintering agents. The pore forming additives are synthetic or...
5250476 Ceramic binder and use thereof  
Ceramic binder for forming and processing ceramic ware, comprising a sol-gel of a mixture of highly charged metal hydroxy cations and one or more low charged metal hydroxy cations, which are able...
5250243 Method for making ceramic matrix composites  
A method for making a ceramic matrix composite article wherein a dispersion of a ceramic matrix powder in a wax-containing thermoplastic vehicle is applied to an inorganic fiber reinforcement...
5244727 Refractories for use in firing ceramics  
A refractory for use in firing ceramics has a ceramic coating applied by plasma spraying onto the surface of a heat-resistant lightweight shaped article containing heat-resistant lightweight shaped...
5242871 Heat-resistant expansion member  
The heat resistant expansion member used as the holding member of the ceramic honeycomb monolithic catalyst in an automobile comprises 20 to 40 wt. % of sepiolite, 30 to 54 wt. % of particulate...
5240887 Heat treatment method for silicon and carbon-containing ceramic fibers and fibers of the same kind with a laminated structure  
The invention is related to a heat treatment method for silicon and carbon-containing ceramic fibers as well as fibers of the same nature with a laminated structure and having an external carbon...
5240888 Inorganic fiber and process for the production thereof  
An inorganic fiber having excellent properties as a reinforcement for metals, plastics and rubbers, which has a surface layer portion and an inner layer portion, the surface layer portion having a...
5238742 Polymer derived ceramic fibers having improved thermal stability  
The present invention relates to ceramic fibers of the Si-C-N-O series with a diameter less than about 20 micrometers. It has been unexpectedly found that the thermal stability of these fibers can...
5238741 Silicon carbide filaments bearing a carbon layer and a titanium carbide or titanium boride layer  
Silicon carbide filaments are coated to protect them from attack by a titanium matrix material when incorporating them into a metal matrix composite. The coating method comprises coating the...
5234675 Manufacturing sintered body of silicon carbide by using SiC whiskers in a multiple heating step process  
An organosilicon high molecular compound having a skeleton of silicon and carbon or a compound obtained by polymerization of an organometallic compound and the organosilicon high molecular compound...
5227249 Boride coatings for SiC reinforced Ti composites  
The subject invention relates to a coated reinforcement material comprising a SiC reinforcement having an outer core coating of the general formula: Ti x M y B z wherein M is at least one of V,...
5225276 Filter aid for analytical use and method for preparing the same  
The present invention relates to a filter aid for analytical use and method for preparing the same, more particularly, a filter aid for analytical use consisting essentially of tangled short-length...
5223461 Ceramic silicon-boron-carhon fibers from organic silicon-boron-polymers  
The present invention concerns novel high strength ceramic fibers derived from boron, silicon, and carbon organic precursor polymers. The ceramic fibers are thermally stable at and above 1200° C....
5200370 Monocrystalline ceramic fibers and method of preparing same  
Monocrystalline ceramic fibers are disclosed together with a process for preparing such fibers. Polycrystalline ceramic fibers in a tow are coated with a coating that is chemically substantially...
5196120 Ceramic-ceramic composite filter  
A ceramic fiber-ceramic composite filter having a support composed of ceramic fibers, preferably texturized, a carbonaceous layer thereover, and a silicon carbide coating over the carbonaceous...
5194409 Process for producing bn-coated SiC whisker and process for producing ceramic comprising said bn-coated SiC whisker as reinforcement  
The present invention discloses a process for producing a boron nitride-coated SiC whisker, comprising dissolving a borazine represented by the following formula (I) in hexane, dispersing a SiC...
5189132 Polymeric hydridochlorosilazanes, process for their preparation, ceramic materials containing silicon nitride which can be manufactured therefrom, and their manufacture  
The invention relates to novel polymeric hydridochlorosilazanes, to their preparation, to their processing to form ceramic materials containing silicon nitride, and to said materials themselves....
5185299 Microcrystalline alumina-based ceramic articles  
Microcrystalline alpha-alumina based ceramic articles comprising at least 60% alumina by weight, and 0.1-7.0 percent by weight iron equivalence in which substantially all the alumina is in the...
5169809 SiO.sub.2 - and ZrO.sub.2 -based ceramic fibers and process for the preparation thereof  
The present invention relates to ZrO 2 - and SiO 2 -based ceramic fibers in which the weight ratio between SiO 2 and ZrO 2 is comprised between 99 and 0.7. The tetragonal ZrO 2 phase is stable...
5167881 Preparation of substantially polycrystalline silicon carbide fibers from polyorganosiloxanes  
A process for the preparation of substantially polycrystalline silicon carbide fibers are provided. The fibers may be fabricated to have a small diameter and are thermally stable at high...
5166104 Polysiloxazanes, silicon oxynitride fibers and processes for producing same  
Novel polysiloxazanes comprising [SiH 2 ) n NH-- and [SiH 2 ) m O-- as the main repeating units are provided. The polysiloxazanes are produced by reacting a dihalosilane or an adduct thereof with...
5162269 Polycrystalline silicon carbide fibers  
This invention relates to the preparation of thermally stable, substantially polycrystalline silicon carbide ceramic fibers derived from a polycarbosilane resin. The unexpected thermal stability of...
5156912 Multi-layer coatings for reinforcements in high temperature composites  
The subject invention relates to a coated reinforcement material comprising a SiC reinforcement having a coating of at least three layers, wherein the layers are alternately A-material layers of...
5155070 Refractory coating composition  
A refractory coating composition, adapted to be applied to a substrate by spraying or gunning, comprising: from about 25 to about 40% by weight alumina; from about 15 to about 25% by weight...
5153031 Use of hydrogen peroxide in preparing magnesium containing silicate sols for coating and fiber formation  
Stable magnesium containing silicate sols are produced by preparing a solution of silicon alkoxide and of magnesium alkoxide and optionally of aluminum alkoxide in solvent wherein the atomic ratio...
5151390 Silicon nitride-based fibers and composite material reinforced with fibers  
Inorganic fibers having a high strength and a high modulus of elasticity at a high temperature are provided. The inorganic fibers are amorphous inorganic silicon nitirde-based fibers composed of...
5145811 Inorganic ceramic papers  
Improved inorganic ceramic papers comprising heterogeneous grades of ceramic fibers, namely small, high surface area fibers and at least one larger, lower surface area ceramic fiber are bonded into...
5139871 Thermochemically treated oligomeric and/or polymeric derived silicon carbide fibers  
Silicon carbide fibers which are derived from oligomeric and/or polymeric precursors are modified and strengthened in annealing the silicon carbide fiber at temperatures in excess of 800° C. under...
5135895 Non-oxide sintered ceramic fibers  
A high temperature, preferably polycrystalline, ceramic fiber having a selectable diameter of between 1 and 200 microns. The fiber is stable in an inert atmosphere at a temperature above about...
5135809 Method for densification of amorphous ceramic material  
The elastic modulus and density of an amorphous, ceramic article derived from a resinous organosilicon polymer and having a composition consisting essentially of silicon, nitrogen and/or carbon are...
5132169 Composite materials having multidirectional reinforcement textures made essentially of ceramic fibers having a silicon compound base  
In order to obtain a reinforcement texture made essentially of silicon compound based ceramic fibers in the production of a composite material, the fibers are spun from a ceramic presursor in the...
5118544 Heat resistant composition processable by vacuum forming  
Disclosed is a heat-resistant composition particularly useful to produce heat-resistant boards, tubes, linings or similar articles, capable of resisting to a high temperature for a substantial...
5114887 Process for preparing oxynitride ceramic fibers  
The process of this invention for preparing oxynitride ceramic fibers comprises spinning a viscous sol obtained by the hydrolysis of a feed mainly consisting of metal alkoxides, steam-treating the...
5112781 Process for producing zirconium based granules and zirconium oxide fibers  
Zirconium based granules are produced by the steps of forming an aqueous solution of a zirconium compound such as zirconium acetate, combining the aqueous solution with a phase stabilizer, and then...
5106790 Filler materials for spiral gaskets  
A filler material for spiral gaskets has: 36.5 weight percent or more fibrous material, composed of 5 to 20 weight percent ceramic fibers, 13.5 to 25 weight percent sepiolite and 1 to 10 weight...
5104830 Composite shaped articles comprising reinforced glass-ceramic matrices  
Composite shaped articles, well adapted for aerospace applications, include a glass-ceramic and an effective amount of a reinforcing agent therefor, preferably a fibrous and ceramic reinforcing...
5104833 Refractory for casting a basic substance  
A refractory for casting a basic substance comprises 100 parts by weight of a refractory aggregate having as main ingredients 3 to 40% by weight of zircon and 97 to 60% by weight of magnesia and a...
5093096 High purity and high strength inorganic silicon nitride continuous fiber and a method of producing the same  
A high purity and high strength inorganic silicon nitride continuous fiber substantially composed of Si and N with excellent properties can be provided. A method of producing the fiber is also...
5091271 Shaped silion carbide-eased ceramic article  
A shaped silicon carbide-based ceramic article having an improved mechanical strength is produced at a high efficiency by a process comprising the step of: forming an organic silicone polymer, for...
5073525 Lightweight tundish refractory composition  
Lightweight, low density magnesia-based tundish refractory compositions containing from 0.01 to 2.00 weight percent styrofoam beads and up to 5.0 weight percent paper fiber are disclosed. The...
5071600 Preparation of substantially crystalline silicon carbide fibers from polycarbosilane  
This invention relates to the preparation of thermally stable, substantially polycrystalline silicon carbide ceramic fibers derived from a polycarbosilane resin. The unexpected thermal stability of...
5071798 Heat-resistant and inorganic shaped article  
A heat-resistant and inorganic shaped article comprising a homogeneous mixture of an alumina powder having an average particle size of 10-50 μm and polycrystalline alumina fibers that are bound...
5064631 Process for preparation of aluminum borate whisker  
A mixture comprising (i) an oxide, hydroxide or oxyhydroxide of aluminum, (ii) an aluminum-containing sulfate, (iii) an oxide or oxyacid of boron or an alkali metal salt thereof and (iv) an alkali...
5063107 Silicon carbide fibre and production thereof  
A silicon carbide fibre, which may have a mean crystallite size of greater than 500A, in which the silicon carbide constitutes greater than 90% by weight of the fibre, and in which the fibre is...
Matches 151 - 200 out of 457 < 1 2 3 4 5 6 7 8 9 10 >