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5508253 |
REBa.sub.2 Cu.sub.3 O.sub.7-y type oxide superconductive material having high critical current density and process for preparation thereof
The present invention is characterized in that oxides of Y, Ba and Cu having a superconductive substance-forming composition are melted, the melt is rapidly cooled and solidified, the obtained...
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5508242 |
Yttrium oxide/titanium oxide ceramic compositions
Ceramic compositions based on yttrium oxide contain a minor amount of a titanium oxide and are readily sintered into dense ceramic shaped articles well adopted for metallurgical applications.
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5506185 |
Ceramic oxyanion emitter
A rare earth oxide matrix (composition of matter) is formed which emits (upon heating) heavy metal oxide anions (oxyanions) into a gas phase, wherein the anions are emitted with high intensity, and...
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5494864 |
Resistive paste
A resistive paste comprising (a) a mixture of a resistive material having a composition of Nb x La 1 -x B 6 -4x, wherein x is from 0.1 to 0.9 mol, and non-reducing glass frit, (b) at least one...
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5484750 |
Transparent polycrystalline garnets
Transparent, polycrystalline garnet bodies having desirable properties for use as laser material, luminescent x-ray scintillator materials and other uses are produced by mixing a chloride source...
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5478456 |
Sputtering target
Electrically conductive sputtering target comprising yttria and amorphous carbon, a method of making the same, and a method of using the same.
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5478498 |
Disordered fluorite-type photochemical hole burning crystal containing SM.sup.2+ as active ions
A disordered fluorite-type photochemical hole burning crystal contains Sm 2 + as active ions, and a composition except Sm 2 + is represented by a general formula α-(MALn)F 6 -v X v where...
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5468427 |
Process for making ultra-fine ceramic particles
A process for producing ultra-fine ceramic particles in which droplets are formed from a ceramic precursor mixture containing a metal cation, a nitrogen-containing fuel, a solvent, and an anion...
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5464797 |
Yttria-zirconia slurries and mold facecoats for casting reactive metals
The disclosure describes an aqueous ceramic slurry having from about 70-weight percent to about 85 weight-percent of a fused yttria-zirconia material. The weight percent of zirconia in the fused...
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5462903 |
Composite alumina/metal powders, cermets made from said powders, and processes of production
The invention relates to nano-composite powders of alumina and metal constituted of grains of micronic size. Each grain comprises a compact matrix of alumina of a specific surface area less than 5...
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5462009 |
Method and apparatus for producing perovskite compositions
A method for producing a perovskite composition from a precursor composition wherein the precursor composition is irradiated with microwaves to heat the precursor composition and convert the...
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5459111 |
Composite ceramics sintered body
The strength of a composite sintered body including yttrium oxide is improved. A composite ceramics sintered body includes a matrix of yttrium oxide and silicon carbide particles dispersed within...
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5457088 |
Process for the preparation of a semiconductor from an oxalate
To prepare a phase-pure, ceramic oxide superconductor which contains, in addition to copper, at least one alkaline earth metal from the group comprising Ba, Sr and Ca, and at least one metal from...
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5453409 |
Ceramic capacitor and method for fabricating the same
A miniaturized ceramic capacitor having excellent electric characteristics and substantial capacity can be obtained by firing under a non-oxidative atmosphere at a temperature of up to 1200° C. A...
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5453294 |
Method of controlling crystal orientation of PZT and PLZT thin films on platinum substrates
In the production of ferroelectric PZT or PLZT thin film by the sol-gel method, application of precursor solution (sol) onto a substrate is followed by heat-treatment for pyrolysis at 150°-250°...
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5447894 |
Sintered ceramic article formed mainly of alumina
A sintered ceramic article formed mainly of alumina, having a chemical composition of from 1 to 10% by weight of La 2 O 3 , from 0.01 to 0.1% by weight of SiO 2 , and the balance of Al 2 O 3 and...
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5434125 |
Rare earth oxide superconducting material and process for producing the same
A rare earth oxide superconducting material represented by REBa 2 2Cu 3 O y (RE is Y, Gd, Dy, Ito, Er or Yb), comprises oxide grains and at least one element selected from Rh and Pt, uniformly...
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5434333 |
Method for treating materials for solidification
A method for treating materials such as wastes for solidification to form a solid, substantially nonleachable product. Addition of reactive silica rather than ordinary silica to the material when...
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5432143 |
Method of producing an RBa.sub.2 Cu.sub.3 O.sub.y microcrystalline structure in which R denotes a lanthanide
A method of producing a microcrystalline RBa 2 Cu 3 O y structure where R denotes a lanthanide chosen from Y, La, Nd, Sm, Eu, Gd, Tb, Ho, Er, Tm, Yb and Lu and where y has a value between 6.9...
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5431704 |
Ceramic abrasive grains, method of producing the same and abrasive products made of the same
Al 2 O 3 -Er 2 O 3 ceramic abrasive grains comprising a second phase consisting of aluminum oxides and erbium oxides in the form of reaction products surrounding a first phase and the first...
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5429775 |
Nuclear fuel pellets and method of manufacturing the same
The present invention provides improved nuclear fuel pellets having high thermal conductivity for use in an LWR. This can be achieved by creating a continuous deposition phase of high-thermal...
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5419844 |
Piezoelectric ceramics
Disclosed herein are piezoelectric ceramics composed of lead titanate zirconate, which is expressed in PbZr 1 -z Ti z O 3 , where z=0.45 to 0.54, with 0.1 to 8 mole percent of the Pb atoms being...
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5413871 |
Thermal barrier coating system for titanium aluminides
An article of manufacture has as its basic structure a piece of a titanium aluminide, such as gamma (TiAl) or alpha-2 (Ti3Al), desirably in the shape of an aircraft gas turbine component. A thermal...
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5411804 |
Water-dispersible, heat-resistant composition and use thereof
The present invention relates to a heat resistant composition which exhibits excellent heat and wear resistances after being cured. Further, it has excellent releaseability and durability, and the...
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5409887 |
Enhancement of mechanical properties of 123 superconductors
A composition and method of preparing YBa 2 Cu 3 O 7 -x superconductor. Addition of tin oxide containing compounds to YBCO superconductors results in substantial improvement of fracture toughness...
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5389585 |
Fine non-oxide ceramic powders
The invention relates to fine non-oxide ceramic powders MeX, wherein Me=B, Al, Si, Ti, Zr, Hf, V, Y, Ta, Nb, Mo, W, La, Fe, Co, Ni and/or Cr and X=C, N, B and Si or combinations thereof, with...
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5389352 |
Oxide particles and method for producing them
The invention is a process for preparing chemically active solid oxide particles useful for polishing, composed primarily of CeO 2 , or CeO 2 together with other oxides, comprising: (a) forming an...
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5384306 |
Fine-particle oxide ceramic powders
The invention relates to fine-particle oxide ceramic powders of the metal oxides MeO, where Me=Al, Si, Zr, Hf, Ta, Nb, Mo, W, V, La and/or Y, Al 2 O 3 being present in the α-phase and SiO 2 ...
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5384293 |
Rare earth oxide-alumina-silica sintered body and method of producing the same
In order to provide a rare earth oxide-alumina type sintered body having no defect such as void and pore, and high strength, toughness and reliability, silica is added to a mixture of rare earth...
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5378682 |
Dense superconducting bodies with preferred orientation
A description is given of a solid oxide-ceramic superconductor containing copper in the crystal lattice which is composed of crystals which are arranged essentially in parallel and intergrown with...
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5378665 |
Crystalline yttrium aluminate and process for making
Ceramic yttrium aluminate fibers are produced by processes that result in the formation of a microcrystalline ceramic oxide structure. In one process, a stoichiometric amount of a yttrium alkoxide...
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5376594 |
Low temperature synthesis of YBA2CU308-X and other crystalline oxides
Process for preparing a high temperature superconductor such as yttrium bum copper oxides, by dissolving suitable proportions of hydrolyzable salts, oxides, or organometallic compounds of yttrium,...
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5372620 |
Modified sol-gel alumina abrasive filaments
Filamentary abrasive particles formed from a sol-gel alumina modified by rare earth metal oxides have excellent abrasive qualities.
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5356868 |
Highly oriented superconductor oxide ceramic platelets and process for the production thereof
A single phase superconducting oxide ceramic material in the form of highly oriented platelets, and a process for the production thereof. The process involves calcining in a non-reducing atmosphere...
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5352642 |
Fabrication of Y.sub.3 Al.sub.5 O.sub.12 fibers from water soluble polymers
A method for fabricating Y 3 Al 5 O 12 (YAG) fibers from water soluble polymers includes a pre-YAG polymer synthesis, with solution viscosity adjustment followed by fiber spinning and heat...
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5350461 |
Low temperature P.sub.2 O.sub.5 oxide diffusion source
The present invention relates to a solid low temperature phosphorus diffusion source that is an R 2 O 3 /P 2 O 5 compound in which the ratio of R 2 O 3 to P 2 O 5 is 1 to 5 and R is Nd, Eu,...
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5350460 |
High temperature phosphorus oxide diffusion source
The present invention relates to a solid high temperature phosphorus diffusion source that is an R 2 O 3 /P 2 O 5 compound in which the ratio of R 2 O 3 to P 2 O 5 is 1 to 3 and R is La, Y,...
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5348918 |
Yttria-alumina fibers
This invention provides a continuous ceramic oxide fiber comprising Al, Y, and O. In another aspect, a method of making the same is taught. The continuous ceramic oxide fiber is useful, for...
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5346865 |
Rare earth-doped, stabilized cadmium halide glasses
This invention is directed to the production of transparent glasses exhibiting transmission far into the infrared regime of the radiation spectrum. The glasses consist essentially, in mole percent,...
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5346869 |
Sintered silicon nitride bodies suitable for use as high impact materials
Described are sintered silicon nitride bodies useful as materials for parts required to have strength, especially excellent impact strength for items such as automobile parts and machine parts. The...
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5334462 |
Ceramic material and insulating coating made thereof
A yttria strengthened ceria material is disclosed. The addition of a small amount of yttria (for example 0.5%) significantly strengthens the ceria. The yttria modified ceria is useful as a thermal...
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5330942 |
Composite of refractory material
A composite refractory material composition comprises a boron carbide matrix and minor constituents of yttrium-boron-oxygen-carbon phases uniformly distributed throughout the boron carbide matrix.
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5310709 |
Production of nonreducible dielectric ceramic composition
A nonreducible dielectric ceramic composition of a system, (A 1 -x R x ) y BO 3 , is produced using using at least one compound selected from the group consisting of water-soluble inorganic...
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5310707 |
Substrate material for the preparation of oxide superconductors
A substrate material for the preparation of an oxide superconductor includes two different rare earth elements A' and A" in the IIIa group, Ga, and 0, the atomic ratio of these elements being...
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5308809 |
Transparent ceramics and production process for the same
The present invention relates to a ceramic based on yttrium oxide and titanium oxide. This ceramic has a light transmission percentage of at least 20% in a wavelength range between 0.5 and 8 μm....
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5302559 |
Mixed crystals of doped rare earth gallium garnet
A method of growing mixed crystals having at least two lattice sites each having a different number of adjacent oxygen ions from melts of oxidic multi-component systems, homogeneous mixed crystals...
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5300482 |
Oxide superconductors
This invention provides an oxide superconductor having a composition of the following general formula of (Tl a Bi b Pb c ) x (Sr d Ba e ) 2y (Ca f Ln g ) y (n-1) Cu wn O 2n +3+δ, wherein Ln...
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5290332 |
Ceramic articles and methods for preparing ceramic articles and for sintering
A method for preparing a ceramic article comprising compacting a particulate including a primary oxide and a secondary oxide to form a blank. The primary oxide is ZRO 2 and the secondary oxide is...
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5288670 |
Process for preparing self-supporting ceramic composite bodies and bodies produced thereby
This invention relates generally to a novel method of preparing self-supporting bodies, and to novel products made thereby. In its more specific aspects, this invention relates to a method of...
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5286688 |
Rare earth oxide powder
Proposed is a green ceramic body prepared from an aqueous slurry of a rare earth oxide powder capable of giving an aqueous slurry having greatly improved stability of the aqueous slurry thereof in...
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