"What can be more palpably absurd than the prospect held out of locomotives traveling twice as fast as stagecoaches?"
|5122505||Carbonate-free inorganic nitrates or oxides and process thereof|
The present invention relates to an improved process to produce an essentially carbon-free nitrate of an alkali metal, alkaline earth metal, transition metal, lanthanide metal, actinide metal, metal, or mixtures thereof, which process comprises: Contactin...
|5122508||Coprecipitation process for preparing raw material powder for Y1 Ba2 Cu3 Ox oxide superconductor|
A process for preparing a bulk powder for an oxide superconductor which comprises mixing an alcohol solution (I) of a copper nitrate and a lanthanoid metal nitrate with an alcohol solution (II) comprising at least one compound selected from the group cons...
|5122503||Superconducting material and method of producing same|
The present invention relates to a superconducting material that is, substances having compositions expressed by empirical formulae Y1-x Bax CuO3, YBa2 Cu3 O7 and LnBa2 Cu3...
|5122510||Method for preparing rare earth-barium-cuprate pre-ceramic resins and superconductive materials prepared therefrom|
A method of making high Tc 1-2-3 superconductors having perovskite structure using solution techniques is disclosed. The process uses two solvent systems to form a resinous preceramic material having a controlled viscosity for facilitating its ...
|5120704||Method of making Tl-Sr-Ca-Cu-oxide superconductors comprising heating at elevated pressures in a sealed container|
High Tc superconducting compounds are made by forming a reaction mixture of the oxides of Sr, Cu, Ca and Tl, compressing these into a hardened body, and placing the hardened body into a container. The container is then evacuated and sealed. The...
|5114702||Method of making metal oxide ceramic powders by using a combustible amino acid compound|
This invention is directed to the formation of homogeneous, aqueous precursor mixtures of at least one substantially soluble metal salt and a substantially soluble, combustible co-reactant compound, typically an amino acid. This produces, upon evaporation...
|5114911||Homogeneous coprecipitation method for preparing YBaCuO superconducting powder|
An oxalate route coprecipitation process for preparing a superconducting YBaCuO system precursor powder comprises preparing an aqueous solution of nitrates of yttrium, barium and copper, which is then mixed with an organic solution containing a dibasic ox...
|5110772||Fabrication of dense SI3 N4 ceramics using CaO-TiO2 SiO.sub. 2|
Ternary CaO-TiO2 -SiO2 compositions are discussed. These compositions are useful as sintering aids for silicon nitride sintering. Use of these ternary compositions allows silicon nitride to be effectively sintered at lower temperatur...
|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 percent organic fibers; 59 weight percent or less inorganic p...
|5106830||High temperature superconductor system having the formula Tl-Ba-Cu-O|
A high temperature superconducting system has the general composition Tl-R-X-Y, wherein: R is a Group 2A element; X is a group 1B element; and Y is a Group 6A element. Preferably, the composition has the following formula Tl-Ba-Cu-O. The high temperature ...
|5106824||Method of manufacturing oxide superconductor and the precursor of the oxide superconductor comprising heat treating in a reducing atmosphere of either hydrogen or carbon monoxide under reduced pressure|
Disclosed is a method of manufacturing an oxide superconductor containing at least an alkaline earth metal and copper. This method comprises the steps of heating a material substance containing elements constituting the oxide superconductor, in an atmosph...
|5102861||Superconductive materials implanted with phosphorus ions and process for preparing the same|
Improvement in the superconducting transition temperature of superconductive materials which have perovskite structure or similar structure to perovskite such as typically Y-Ba-Cu-O type perovskite compounds is obtained by implanting phosphorus ion in the...
|5100866||Process for producing compound oxide high temperature superconducting material Tly Cul-y O3-z where RE=Y or La|
A superconducting material and a process for producing a superconducting material comprising a compound oxide represented by the general formula: (Ba, γ)x (,ଲ)1 -x &3xb5;y Cu1-y O3-z
|5100871||Method for preparing rare earth-barium-cuprate pre-ceramic resins and superconductive materials prepared therefrom|
A method of making high Tc 1-2-3 superconductors having perovskite structure using solution techniques is disclosed. The process uses two solvent system to form a resinous pre-ceramic material having a controlled viscosity for facilitating its ...
|5098868||Vanadium-based superconducting metallic oxides|
Vanadium-containing superconducting oxides are disclosed having critical temperature (Tc) values of above about 100° K. and preferably about 110°-150° K., together with predicted current density (Jc) values on the order of 10...
|5096879||Synthesis of Bi-Ca-Sr-Cu-O superconductive material|
A mixture comprised of an alkali chloride solvent and reactants comprised of bismuth sesquioxide, calcium oxide, strontium oxide and copper oxide, or precursors therefor, wherein the reactants are formulated to produce a superconducting reaction product, ...
|5096642||Process for producing a high density ceramic of perovskite|
A process for producing a high density ceramic of perovskite represented by the formula: ABO3 wherein A is one or more metal elements coordinated with 12 oxygen atoms, and B is one or more metal elements coordinated with 6 oxygen atoms, which c...
|5093312||(Ba, Ca)x (, Dy)1-x Tly Cu1-Y O3-z where is Y or La oxide high temperature superconducting material|
A superconducting material and a process for producing a superconducting material comprising a compound oxide represented by the general formula: (Ba, γ)x (,ଲ)1-x &3xb5;y Cu1-y O3-z in which ...
|5091344||Fiber reinforced ceramics of calcium phosphate series compounds and method of producing the same|
It relates to calcium phosphate series compound ceramics in which heat-resistant inorganic short fibers such as flawless SiC or Si3 N4 are three-dimensionally dispersed in a matrix composed of calcium phosphate series compound and en...
|5089466||Stable mixed metal superconductive oxides containing nitrogen|
Stable mixed metal oxide compositions containing nitrogen are formed by treating an oxygen-deficient perovskite composition with nitrogen dioxide. Preferably, the oxygen-deficient perovskite is of the formula Xa Zb Cuc O
|5089195||Method for producing calcium phosphate-based material|
A method for producing a calcium phosphate-based material comprising: (a) molding a calcium phosphate powder; (b) preliminarily calcining the resulting molding in a vacuum or under a reduced pressure until the relative density is 95% or more; and (c) firing the mol...
|5086034||Calcination and solid state reaction of ceramic-forming components to provide single-phase superconducting materials having fine particle size|
An improved method for the preparation of single phase, fine grained ceramic materials from precursor powder mixtures where at least one of the components of the mixture is an alkali earth carbonate. The process consists of heating the precursor powders i...
|5084439||Meltable high temperature Tb-R-Ba-Cu-O superconductor|
A high temperature superconductor is provided having meltability. The superconductor has a preferred composition of Tb-R-Ba-Cu-O wherein R is chosen from the group of rare earth metals excluding: Praseudyium; Cerium; and Terbium....
|5084436||Oriented superconductor containing a dispersed non-superconducting phase|
An oxide superconductor comprising a matrix of plate crystals of the formula REBa2 Cu3 O7-y wherein RE is at least one member selected from the group consisting of Y, La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, and Lu, and y i...
|5082825||Process for making T1-Ba-Ca-Cu-O superconductors|
A process of making high-temperature Tl-based superconductors. The process includes the steps of reacting solid Ba-Ca-Cu-oxides with Tl2 O3 vapor. The process allows high quality Tl-based superconductors to be easily fabricated....
|5077272||Preparation method of bulk Y--Ba--Cu--O superconductors with high transport critical current density|
A preparation method of bulk YBa2 Cu3 Ox superconductors with high transport critical current and critical current density (Jc), wherein x is 7-δ, obtained by a modified melt-textured growth method. A continuous dc curren...
|5073199||Insulating material containing pitch based graphite fiber|
An asbestos-free insulating material suitable for use in molten metal casting is disclosed. The material is made from a mixture comprising lime, siliceous component, wollastonite, inorganic fiber and pitch based graphite fiber. The mixture is mixed with w...
|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 compositions have excellent rapid heating, thermal insulative, ...
|5073536||High temperature superconductors comprising Tl--Ca--Ba--O, Tl--Sr--Ba--Cu-- O --Sr--Cu--O|
A new high temperature superconductor with transition temperature above 120 K. is disclosed. The superconductor in a preferrred embodiment comprises TlRBaCuO wherein R is chosen from Group 2A elements excluding Ba. In another preferred embodiment, the sup...
|5066635||High temperature superconducting Ti-Ba-Ca-Cu-O phases|
A new high temperature superconducting system with transition temperature above 120 K is disclosed. One superconductor in that system in a preferred embodiment comprises TlRBaCuO wherein R is chosen from Group 2A elements excluding Ba. In a preferred embo...
|5066625||Method of making contamination-free ceramic bodies|
Ceramic structures having high strength at temperatures above 1000° C. after sintering are made by mixing ceramic powders with binder deflocculants such as guanidine salts of polymeric acids, guanidine salts of aliphatic organic caboxylic acids or guanid...
|5064808||Method of manufacturing oxide superconductors using self-propagating high-temperature synthesis|
The invention relates to production of superconductors, more particularly, LnM2II M3I Oy compounds where y=6-8; Ln=Y, Sc or lanthanide; MII =Ba, Ca or Sr; MI =Cu, Cu+Ag or LnM2
|5063202||High transition temperature superconductors|
The phase of the YBa2 Cu3 O9-δ having a perovskite unit cell structure of approximately the following dimensions a=3.8A, b=3.9A, and c=13.55A has been discovered and identified....
|5061683||Process for making superconductors using barium hydroxide|
There is disclosed an improved process for preparing a superconducting composition having the formula Mw Az Cuv Ox wherein M is selected from the group consisting if Bi, Tl, Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm Yb ...
|5061682||Ceramic precursor mixture and technique for converting the same to ceramic|
Ceramic precursor mixtures containing a metal cation, a carbohydrate, and an anion capable of participating in an anionic oxidation-reduction reaction with the carbohydrate for continuous or batchwise drying and pyrolyzing to provide ceramic powders....
|5057486||Synthesis of Bi-Pb-Ca-Sr-Cu-O oriented polycrystal superconductor|
A particulate mixture comprised of Bi2 CaSr2 Cu2 O8b1;x where x ranges from 0 to 0.5, Ca2 CuO3, cupric oxide and lead oxide, wherein the Bi2 CaSr2 Cu2 O
|5057488||Synthesis of Bi-Pb-Ca-Sr-Cu-O superconductive material|
A reactant particulate mixture comprised of Bi2 CaSr2 Cu2 O8b1;x where x ranges from 0 to 0.5, Ca2 CuO3, cupric oxide and lead oxide is formulated and reacted to produce superconductive B...
|5049541||Process for preparing superconductor|
Superconductors of the Bi-Pb-Sr-Ca-Cu-O system and Tl-Pb-Ba-Ca-Cu-O system having a high Tc phase (about 110K and about 125K, respectively, or more) at a high proportion are obtained by adding a calcium compound which forms CaO and a liquid phase at a tem...
|5043223||Multilayer ceramic substrate and method for making the same|
A multilayer ceramic substrate comprises plural conductive layers and insulation layer for insulating the plural conductive layers, and the insulation layer is made of an inorganic composition comprising at least one member selected from the group of Al
|5043305||High thermal expansion coefficient ceramic sinter and a composite body of the same and metal|
The ceramic sinter is composed of a metal oxide such as ZrO2 and 10-90 vol. % of metal fluoride which is selected from the group having not less than 2.5 electronegativity difference between fluoride and the metal element. The ceramic sinter ha...