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5279886 |
Alumina sintered body
The present invention provides an improved alumina sintered body on which a heater electrode is printed and which is sintered simultaneously with the heater electrode at temperatures lower than the...
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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...
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5273628 |
Mixed ionic-electronic conductors for oxygen separation and electrocatalysis
Mixed oxygen ion and electronic conducting bismuth oxide based ceramic materials having high ambipolar activity which can be fabricated into thin membranes for high efficiency oxygen separation...
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5273956 |
Textured, polycrystalline, superconducting ceramic compositions and method of preparation
Textured, dense, polycrystalline ceramic bodies are produced by a sinter-compression process which exhibit anisotropic superconducting properties. The bodies are produced from low density...
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5272120 |
Block guage and method of marking ceramic material
A method of making a ceramic material by radiating a laser beam onto the portion of said ceramic material to be marked in a low oxygen atmosphere and a block gauge marked by this marking method....
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5250478 |
Aluminum nitride sintered body and process for preparation thereof
Disclosed is an aluminum nitride sintered body comprising aluminum nitride and a sintering aid, wherein the sintering aid is composed mainly of at least one component selected, as the oxide, from...
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5248660 |
Process of preparing yttrium based superconductors
A process of preparing a yttrium based superconductor including partial melting a body of YBa 2 Cu 3 O y compound which is stacked on a Y 2 BaCuO 5 plate, to produce a liquid phase, BaCu 2...
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5242897 |
High T.sub.c superconducting oxides
Complex superconducting oxides are fabricated through appropriate selection and use of fundamental superconducting "building blocks." In this fashion, the invention provides a rationalized method...
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5236876 |
Body of cerium-doped quartz glass
A body of cerium-doped quartz glass is manufactured by melting together silicon oxide and a cerium (III) silicate compound, preferably Ce 2 Si 2 O 7 , in a reducing atmosphere. The invention...
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5232880 |
Method for production of nonreducible dielectric ceramic composition
A nonreducible dielectric ceramic composition of a system, (A 1 -x R x ) y BO 3 , is prepared by preparing a slurry containing at least one compound selected from the group consisting of...
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5229335 |
Ceramic materials and their synthesis by a xerogel process
The invention provides a process for producing high phase purity ceramic materials through the utilization of organic gelling agents. The process comprises the following steps: (a) dissolving...
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5227362 |
Parametrically modified superconductor material
An oxide type superconducting material comprising a plurality of metal species and oxygen in combined form, said superconducting material improved by the addition of a parametric modifier.
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5217945 |
Oxide superconductors and method for producing same
The present invention provides an oxide superconductor which has a relatively high transition temperature T c . This superconductor has the chemical formula (R 1 -x Ca x )(Ba 1 -y Sr y ) 2 Cu 3 O...
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5215962 |
90 K Tl-Ba-Ce-Cu-O superconductor and processes for making same
A high temperature superconductor system having the nominal composition: Tl-Ba-Ce-Cu-O. The high temperature superconductor of the present invention has a transition temperature of about 90 K....
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5213906 |
Composite material comprising a layer of a III-V compound and a layer of rare earth pnictide, production process and application
The present invention relates to a composite material. This material comprises at least one layer A of III-V compound and one epitaxial layer B on said layer of III-V compounds, the epitaxial layer...
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5214011 |
Process for preparing ceramic-metal composite bodies
A process is presented for the fabrication of a metal/ceramic composite by a non-vapor phase oxidation of a molten metal by contacting said molten metal at an elevated temperature with a...
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5206211 |
Process for the production of an elongate body consisting of longitudinally aligned acicular crystals of a superconducting material
Process for the production of an elongate body of longitudinally aligned acicular crystals (3) of the superconducting substance REBa 2 Cu 3 O 6 .5+y, with RE=rare earth metal, 0<y<1, in...
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5202306 |
Fracture toughness for copper oxide superconductors
An oxide-based strengthening and toughening agent, such as tetragonal Zro 2 particles, has been added to copper oxide superconductors, such as superconducting YBa 2 Cu 3 O x (123) to improve...
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5200390 |
Co-precipitation process for preparing superconductor powder
A fine stoichiometric superconductor powder may be co-precipitated from the addition of appropriate metal compound powders in ammonium carbonate. The co-precipitated powder is very homogeneous...
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5190914 |
Superconducting material of metal oxides
A superconducting material is disclosed which includes oxides of metals having the following composition: (Pb 1 -z Cu z ) ((Sr 1 -y Ba y ) 1 -v Ca v ) 2 (A 1 -x Ca x )Cu 2 wherein A is at least...
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5189010 |
Process for preparing superconductive thick films
A process of forming on a substrate a coating of a precursor of a crystalline rear earth alkaline earth copper oxide or heavy pnictide mixed alkaline earth copper oxide electrical conductor and...
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5185301 |
Sinter reactive lanthanum chromite and process for making it
A sinter-reactive lanthanum chromite powder is prepared from the lanthanum chromite precursor LaCr 1 -x M x O 3 (Adsorbate). The powder is crystalline, has the formula LaCr 1 -x M x O 3 , where...
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5183801 |
Stabilized bismuth oxide
Disclosed is a stable bismuth oxide composition having excellent oxygen ion conductivity comprising: from 50 to 90 mole % Bi 2 O 3 , from 10 to 40 mole % of a rare earth oxide, such as yttria; and...
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5182051 |
Raioactive tracing with particles
There is provided radioactive particles having a ceramic matrix and an element which can be bombarded with neutrons to produce a gamma ray-emitting isotope. The particles are manufactured by mixing...
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5180706 |
High-temperature porous-ceramic superconductors
A method for fabricating a high-temperature ceramic superconductor having a Y-Ba-Cu-O or other copper-oxide composition of comparable properties so as to render the ceramic porous to define...
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5175140 |
High Tc superconducting material
A new high Tc superconducting compound oxide material represented by the general formula: AuBvCwCuxOy in which "A" is selected from the group consisting of magnesium(Mg), calcium(Ca),...
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5173478 |
Process for producing oxide superconductive material by firing and apparatus therefor
In a process or an apparatus for producing an oxide superconductive material by firing, a gas passage is formed in a firing furnace and a material to be fired, consisting of a ceramic...
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5171645 |
Zirconia-bismuth oxide graded electrolyte
A graded electrolyte of zirconia and bismuth oxide containing proposed surface regions one of which is rich in zirconia, the other rich in bismuth oxide is disclosed. The strength and reduction...
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5169811 |
Beneficiated lanthanum chromite for low temperature firing
A lanthanum chromite ceramic powder mixture that consists essentially of 1 mol of LaCr 1 -x M x O 3 , where M is a divalent metal selected from the group consisting of magnesium, calcium and...
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5168095 |
Method for synthesizing a composite oxide by citrating process
A composite oxide synthesized by a citrating process and utilized in functional ceramics materials is prepared by the following process. Co-precipitants or mixtures of at least one component...
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5164246 |
Highly thermoconductive ceramic
A highly thermoconductive ceramic substrate, which is characterized by having formed on a ceramic substrate an electroconductive coating of a mixture of tungsten and/or molybdenum with the nitride...
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5164349 |
Electromagnetic effect material
An electromagnetic effect material comprising xA-yB-zC-wD-α0 series oxide ceramics, in which A and B represent one or more of element selected from the combination of elements represented by the...
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5155092 |
Ceramic superconducting composition and process and apparatus for preparing thereof
In a ceramic superconducting composition, Ag20 is added thereto in an amount of 0.1 wt. % to 70 wt. % per mole of LaBa2Cu3O3-δ. The critical current density of the ceramic superconducting...
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5152936 |
Method of manufacturing spherical grains of rare earth oxides
Inventive rare earth oxide voidless spherical grains having a mean grain diameter of from about 20-300 μm formed by granulating a rare earth oxide powder having a mean grain diameter of 1 μm or...
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5149683 |
Method for producing oxide superconductor
A method for producing an oxide superconductor formed according to a chemical composition formula (R 1 -x Ca x )(Ba 1 -y Sr y ) 2 Cu 4 O 8 and having a transition temperature of 77K or above,...
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5132255 |
Plastic compositions of inorganic powders and sintered bodies of the same
An aqueous plastic composition of an inorganic powder which per se has substantially no plasticity which comprises: the inorganic powder and a polysaccharide of natural origin. The molding and...
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5128284 |
Preparation of lanthanum chromite powders by sol-gel
This invention relates to a process for the preparation of a crystalline compound having an empirical formula LaCr x A 1 -x O 4 yH 2 O where A is a metal selected from the group consisting of...
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5128112 |
Synthesis of actinide nitrides, phosphides, sulfides and oxides
A process of preparing an actinide compound of the formula An x Z y wherein An is an actinide metal atom selected from the group consisting of thorium, uranium, plutonium, neptunium, and...
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5122487 |
Solid electrolyte of partially stabilized zirconia and method of producing same
As a solid electrolyte suitable for use in oxygen sensors a partially stabilized zirconia, which essentially consists of 4.5-6.0 mol % of Y 2 O 3 and the balance of ZrO 2 and is constituted of...
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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 Y 1 -x Ba x CuO 3 , YBa 2 Cu 3 O 7 and LnBa 2 Cu 3 O 7 and...
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5120483 |
Rare earth boride/alumina composites and methods of making
The invention encompasses unsintered and sintered compositions comprising boride and alumina. A sintered material containing boride and alumina may be produced by a method comprising: a)...
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5118659 |
Production of superconductor materials using a helicoidal flow of hot gases to effect pulverization and drying
Finely divided, homogeneous and easily sintered superconducting powders of at least one rare earth element, e.g., yttrium and/or lanthanum, at least one alkaline earth metal, e.g., barium, calcium...
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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...
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5112783 |
Conductive copper oxide ceramics and process for producing same
Cubic conductive copper oxide ceramics which are represented by the following formula I: (M x Cu y ) 7 O z A w I wherein M represents at least one element selected from the...
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5106828 |
Method for fabricating superconductors by sol-gel process
Superconducting oxides in the A, B, Cu oxide ternary system, where A is yttrium or a rare earth and B is an alkaline earth, are formed as thin films on a substrate by a sol-gel technique.
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5102749 |
Electronic package comprising aluminum nitride and aluminum nitride-borosilicate glass composite
An electronic package comprising dielectric layers including a densified aluminum nitride (AlN) base layer and at least one densified AlN-borosilicate glass composite layer bonded thereto is...
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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...
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5100866 |
Process for producing compound oxide high temperature superconducting material Tl.sub.y Cu.sub.l-y O.sub.3-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 (α,β) 1 - x ε y Cu 1 -y O 3 -z...
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5098885 |
Superconductive substance Y.sub.0.294 Ba.sub.0.336 Cu.sub.01.77
The disclosed substance has a composition of Y x Ba y CuO z , wherein x=0.2-0.5 y=0.2-0.5 and z.perspectiveto.1+y+(3/2)x, with a face-centered tetragonal crystalline structure of perovskite type....
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5091120 |
Process for obtaining UO.sub.2 fuel pellets from metallic U without producing any effluent
Process for obtaining nuclear fuel pellets, which produces no liquid effluent, for which the starting product is metallic uranium, which is oxidized to U 3 O 8 , then crushed and either reduced...
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