Compositions: ceramic inventions 04/06

20060089248 - Composition for preparation of improved silicon carbide powder: The synergistic composition consists of a mixture of a source of pure silica such as silicon dioxide, a source of carbon such as activated charcoal, β-silicon carbide and a source of iron such as ferric nitrate. The cost effective synergistic composition is useful for the preparation of improved silicon carbide...

20060089249 - Composition useful for preparation of dense neodymium stabilised beta-silicon nitride-alpha-siaion composite: The present invention consists of a synergistic mixture of Si3N4, Al2O3, AlN, SiO2 and Nd2O3. The cost effective synergistic composition is useful for the preparation of dense neodymium stabilised β-Si3N4-α-SiAlON composite of the order of >98% theoretical density, having high hardness and high fracture toughness. The dense β-Si3N4-α-SiAlON composite will...

20060089250 - Process for manufacture of dense neodymium stabilised beta-silicon nitride - alpha-sialon composite: The present invention provides a process for the manufacture of dense neodymium stabilised β-Si3N4-α-SiAlON composite, wherein a synergistic composition essentially consisting of Si3N4, Al2O3, AlN, SiO2 and Nd2O3 as starting materials is mixed in proportion to make a total of 100 mole in the mixed batch, passing the powder through...

20060084561 - Lamp reflector substrate, glass, glass-ceramic materials and process for making the same: The present invention relates to glass, glass-ceramic materials, lamp reflectors and processes for making them. The glass material has a composition, by weight of the total composition, comprising 56-67% SiO2; 9-22% Al2O3; 3.4-3.8% Li2O; 1.8-2.6% ZnO; 1.5-2.5% MgO; 3.3-5% TiO2; 0-2.5% ZrO2; 1.5-3% B2O3; 0-6% P2O5; 0-0.6% F; less than...

20060084562 - Colored glass for lighting, colored glass bulb and method for producing thereof: The present invention provides colored glass containing no hazardous substances, such as CdS, CdSe and PbCrO4, and used for lamps and covers for lighting, a colored glass bulb with yellow to orange color produced by using said colored glass, and a method for producing said colored glass and said colored...

20060084563 - Process of preparation of synthetic fire opal: A synthetic fire opal and a process for its preparation. Synthetic fire opals have similar physical and chemical properties as natural fire opals. Synthetic fire opals are colored, hard, and transparent. The process of preparation of synthetic fire opal includes; mixing TEOS with absolute ethanol (99.9%), distilled water, concentrated nitric...

20060084564 - Refractory mixes containing condensed tannin and furfuryl alcohol, and their uses: This invention relates to refractory mixes produced by mixing a refractory material with an organic binder and heating to a temperature of typically from about 50° C. to about 100° C. to form a stable composite granulate. The refractor mixes comprise a major amount of a refractory material and a...

20060084565 - Whisker-reinforced ceramic containing aluminum oxynitride and method of making the same: A ceramic body, as well as a method for making the same, wherein the ceramic body contains aluminum oxynitride and whiskers, (and optionally) one or more of titanium carbonitride, and/or alumina, and/or zirconia, and/or other component(s)....

20060084566 - Multiphase ceramic nanocomposites and method of making them: Multiphase ceramic nanocomposites having at least three phases are disclosed. Each of the at least three phases has an average grain size less than about 100 nm. In one embodiment, the ceramic nanocomposite is substantially free of glassy grain boundary phases. In another embodiment, the multiphase ceramic nanocomposite is thermally...

20060079387 - High homogeneity silica glass prepared through a sol-gel procedure: The present invention relates to a Si2O glass characterized by a high homogeneity, prepared through a sol-gel procedure....

20060079388 - Ultra low residual reflection, low stress lens coating: A method is provided for coating optical lenses and other optical articles with anti-reflection (AR) coatings. The lenses have low reflectivity, provide a substantially white light reflection and have a low stress AR coating and are ideally suited for optical lenses made using a molding procedure which provides a low...

20060079389 - Optical glass, precision press-molding preform, process for the production of the preform, optical element and process for the production of the optical element: Provided is an optical glass for precision press-molding is free from degradations in product quality caused by a surface altered layer such as fogging, browning, etc., and a precision press-molding preform and an optical element provided are formed of the above glass. The optical glass is a glass which contains...

20060079390 - Optical glass, preform for precision press-molding, process for the production of the preform, optical element, and process for the production of the element: o

20060079391 - Dielectric material and the method of preparing the same: The present invention relates to a novel ZnTiO3-based dielectric material, having the composition represented by the formula (Zn1-aMga)(Ti1-b-cMnbDc)dO3, wherein D is an element having a valence of 5 or above, 0≦a≦0.5, c≦b≦0.1, 0<c≦0.1, 1≦d≦1.5, which has properties of ultra low sintering temperature, high reliability, and high dielectric strength, and is...