Compositions: ceramic inventions 01/06

20060019813 - Sealing glass composition, sealing glass frit, and sealing glass sheet: A sealing glass composition which has an alkali metal oxide content kept down as much as possible, and can stably join metal or ceramic members together in a temperature range of 600 to 900° C. The sealing glass composition is used to join together members each selected from the group...

20060019814 - Pb-free glass composition for barrier ribs of plasma display panel, and plasma display panel comprising the pb-free glass barrier ribs prepared therefrom: Disclosed is a Pb-free glass composition for barrier ribs of a PDP, which includes from 20 to 70 wt % of ZnO; from 10 to 50 wt % of BaO; from 10 to 40 wt % of B2O3; from 0 to 20 wt % of P2O5; from 0 to 20...

20060019815 - Clad glass composition and mother glass rod for gradient-index rod lens formed using the same, gradient-index rod lens and method of manufacturing the same, rod lens array, and image processor: The present invention provides a clad glass composition that is excellent in devitrification resistance and that prevents the whole mother glass rod from devitrifying by preventing a core glass composition from devitrifying in forming a mother glass rod using a concentric crucible drawing method. The clad glass composition forms a...

20060019816 - Composite silicon carbide body and method for its preparation: A method for manufacturing a silicon carbide composite body and includes the steps of forming a slurry including silicon carbide and a carbonaceous precursor, adding to the slurry composite granules containing a carbonaceous binder and carbon black, drying the slurry, shaping the dried slurry and sintering the dried and shaped...

20060019817 - Aluminum nitride ceramic, semiconductor manufacturing member, and manufacturing method for aluminum nitride ceramic: An aluminum nitride ceramic including aluminum nitride grains and grain boundary phases comprises a grain boundary phase-rich layer including more amount of the grain boundary phases in a surface layer of the aluminum nitride ceramic than in an inside of the aluminum nitride ceramic. The grain boundary phases in the...

20060019818 - Dielectric composites and methods of making such: Most of the dielectric ceramic compositions consist of three or more different lead-based or non-lead ceramics. These materials and their solid solutions can give high dielectric constants (er>10000) but the disadvantage is large fluctuations in the dielectric constant with increasing or decreasing temperature. Most applications of these materials are therefore...

20060014620 - Free flowing glass batch: A process for preparing and storing moist glass-making batch is disclosed, comprising incorporating a surfactant in moist batch so that when the batch is either: a) stored at a temperature below 35° C., it remains free flowing without setting, or b) pre-heated at, or above, 100° C. before supply to...

20060014621 - Dielectric ceramic and multilayer ceramic substrate: A dielectric ceramic obtained by firing a raw material comprising an alumina powder, a crystallizable glass powder mainly containing SiO2, CaO and MgO, and a noncrystallizable glass powder mainly containing SiO2, B2O3 and Na2O. After the firing, the dielectric ceramic contains an alumina crystal phase, a diopside crystal phase (Ca(Mg,...

20060014622 - Refractory shaped body with increased alkali resistance: The invention relates to a refractory batch and to a process for its production. The batch comprises a refractory metal oxide main component containing Al2O3; the refractory metal oxide main component containing 40 to 60% by weight of Al2O3; a phosphate bond, in particular, the phosphate bond being produced by...

20060014623 - High thermal conductivity ain-sic composite artificial dielectric material: Dense composites of dielectric material having high thermal conductivity and adjustable dielectric properties. The dense composites are composed of homogeneous mixtures of AlN and SiC with at least one member selected from the group consisting of Y2O3, La2O3, rare earth oxides, CaO and Li2O. These composites are ideally shaped into...

20060014624 - High dielectric strength monolithic si3n4: A monolithic silicon nitride material and a method of manufacturing the material. The material is disclosed in a range of composition variations all of which exhibit high dielectric strengths suitable for use in insulator applications. Moreover, the material retains its dielectric and structural integrity even at elevated temperature, such as...

20060014625 - Stoichiometrically balanced silicon nitride ceramic for high performance cutting tools: A silicon nitride based ceramic, that is highly effective for use as a cutting tool for the high speed machining of cast irons, that is essentially a homogeneous mixture consisting of both crystalline and whisker forms of beta silicon nitride that are interstitially bonded by a stoichiometrically balanced glass mixture...

20060014626 - Tunable lossy dielectric ceramic material having zrc as a dispersed second phase: An aluminum nitride (AlN), alumina, magnesia, beryllia or other dielectric matrix with a ZrC dispersed phase is provided. Mixed powders of aluminum nitride or other dielectric phases and ZrC, with or without Y2O3, CaO, Li2O, La2O3, and other rare earth metal oxides or mixtures thereof are formed by dry pressing...

20060014627 - Electro-static dissipative ceramic products and methods: The invention provides partially stabilised zirconia and alumina based electro-static dissipative or ESD ceramic compositions. The proposed ceramic compositions include specific amounts of dopants comprising one or more metal oxides selected from iron oxide, chromium oxide and titanium oxide. The proposed ESD ceramic materials are made into useful industrial products...

20060009342 - Glass ceramics for laser systems: A glass-ceramic material, particularly for elements in laser systems, and a method for preparing same. The glass-ceramic material may be used for an optical fiber for communication systems and laser systems. The glass-ceramic may include gahnite crystals and optionally β-quartz-like solid solution, or a petalite-like crystals, spinel, and zirconia crystals....

20060009343 - Uv-absorbing borosilicate glass for a gas discharge lamp, process for manufacturing same and gas discharge lamp made with same: Glass for gas discharge tubes, which are used in fluorescent lamps, EEFL lamps, LCD displays, computer monitors, telephone displays and TFT displays, and a process for making it are described. The glass contains, in % by weight based on oxide content: SiO2, 60-75; B2O3, >25-35; Al2O3, 0-10; Li2O, 0-10; Na2O,...

20060009345 - Material demonstrating negative or low thermal expansion coefficient and method for manufacture thereof: The material is an oxide represented by the chemical formula ((R4+M2+)1-xA3+2x)(QO4)3 (where R stands for at least one tetravalent metal element selected from Zr and Hf; M stands for at least one divalent metal element selected from Mg, Ca, Sr, Ba, and Ra; Q stands for at least one hexavalent...

20060009344 - Zirconia structural body and manufacturing method of the same: A zirconia structural body includes a substrate having one surface on which a first electrode, a zirconia layer, and a second electrode are successively laminated. The zirconia layer is a bonded body of mixture consisting of monoclinic zirconia crystal grains and cubic zirconia crystal grains....

20060009346 - High durability refractory composition: A high temperature hot strength magnesia-based refractory composition having high durability at elevated temperatures wherein a sulfamic acid in combination with an independent calcia source is added to a magnesia-based refractory material. The invention also provides for a refractory gunning composition for use in the production or repair of metallurgical...

20060009347 - Method for producing aluminum magnesium titanate sintered product: The present invention provides a process for preparing a sintered body comprising as a basic component aluminum magnesium titanate represented by the composition formula: MgxAl2(1−x)Ti(1+x)O5 wherein the value of x is 0.1≦x<1. The process comprises a step of sintering a formed product from a raw material mixture comprising 100 parts...

20060009348 - Ultra-low residue, high solids, wet cake products and methods of making same: Disclosed herein is ultra-low residue, high solids, wet “cake” kaolin and ultra-low residue, high solids, wet “cake” calcined kaolin products, produced by use of wet screening/non-drying product isolation, which are useful in the manufacture of top size-sensitive applications....

20060003883 - Lead-free glass material for use in sealing and, sealed article and method for sealing using the same: A lead-free glass material for use in sealing, which has a glass composition being free of lead and exhibits high performance in the range of choices for the material to be sealed, the sealing processability, the sealing quality and the like, has a glass composition including four types of metal...

20060003884 - Alkali free glass: An alkali free glass characterized in that the ratio (Δan-st/α50-350) of the equilibrium density curve gradient Δan-st (ppm/° C.) in a temperature range of from about the annealing point (Tan) to about the strain point (Tst) to the average linear expansion coefficient α50-350 (×10−6/° C.) in a range of from...

20060003885 - Silicon nitride ceramic with a high mechanical stability at room temperature and above: The invention relates to cast parts which contain at least 87 wt. % silicon nitride and up to 13 wt. % of an additive combination comprised of Al2O3 and Y2O3. The initial composition of the mass formulation starts with Y2O3/Al2O3 ratios of less than 1.1, preferably with Y2O3 Al2O3 ratios...

20060003886 - Construction material and method: A structural material of a polystyrene base and the reaction product of the polystyrene base and a solid phosphate ceramic. The ceramic is applied as a slurry which includes one or more of a metal oxide or a metal hydroxide with a source of phosphate to produce a phosphate ceramic...

20060003887 - Catalyst-containing clay materials for composites in polymer of macrocyclic oligomers: Clays useful as fillers for preparing nanocomposites are combined with a polymerization catalyst by mixing the clay and the catalyst, generally in the presence of a diluent. The catalyst at least partially intercalates the clay or becomes chemically bonded to the clay. The catalyst-containing clays are then useful for preparing...