Class 505/735 - By sol-gel process

Subclass of Class 505 - Superconductor technology: apparatus, material, process
Definition: Process in which a colloidal dispersion (i.e., sol) is produced
No. of patents: 32
Last issue date: 09/09/2003

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Number	Title	Issue Date
6616965	Non-hydrolytic-sol-gel process for high K dielectric Tantalum and niobium aluminum-doped hydrated mixed metal oxide sols may be made by a process comprising combining a first metal compound aluminum alkoxide, with a second metal compound selected from the group consisting of niobium alkoxide and tantalum al...	09/09/2003
6559103	Method for producing superconducting oxide compounds A process is provided for preparing solid superconducting mixed-metal oxides whereby the superconductor can be formed into any predetermined shape by way of viscous sol precursors. The superconductors are also formed by this process into homogeneous phase...	05/06/2003
5620945	Process for forming a superconductive fiberform ceramic composite Processes are provided for forming a superconductive composite, comprising a superconductive metal oxide and a ceramic. The composite may be formed in any desired shape. Liquid nitrogen can be held around the superconductor longer and delivered in a more ...	04/15/1997
5589441	Superconductive fiberform ceramic composite Processes are provided for forming a superconductive composite, comprising a superconductive metal oxide and a ceramic. The composite may be formed in any desired shape. Liquid nitrogen can be held around the superconductor longer and delivered in a more ...	12/31/1996
5480862	Method for the preparation of precursors for superconductors and compounds thus obtained Method for the preparation of a precursor for a superconductor, comprising the addition of a condensation product to an aqueous solution of metal salts, the total or partial removal of water from the mixture thus obtained, the subsequent processing of the...	01/02/1996
5368768	Copper and barium (dialkylaminoalcoholate) solutions Solubilized metal (dialkylaminoalcoholate) compounds in organic solvent can serve as a source of metal values for metal oxide-containing superconductor compositions. Stable solutions, resistant to precipitation problems, can be formed by reaction of a dia...	11/29/1994
5306696	Method of producing YBa₂ Cu₄ O_x -type superconducting metal oxides A method of producing a superconductor of metal oxides having the following composition: (M1-x Cax)(Ba1-y Sry)2 Cu4 O8 wherein M stands for a rare earth element, x is 0 or a positive numbe...	04/26/1994
5304533	Process for producing an oxide superconductor from alkoxides A process for producing a superconductor of an oxide system, which comprises uniformly mixing metal elements for constituting the oxide system at least partly in the form of alkoxides having CN--, X-- wherein A is a halogen atom and...	04/19/1994
5294599	Processes for preparing oxide powders and superconducting oxides Fine and homogeneous oxide particles for superconductors which can be sintered at a low temperature are prepared in a liquid phase by the sol-gel method using alkoxides as starting materials. By forming a buffer layer between a substrate and a superconduc...	03/15/1994
5236890	Method of producing superconductor of metal oxides A method of producing a superconductor of metal oxides which includes subjecting an organic solvent solution containing (a) an alkoxide of a rare earth element, (b) an alkoxide of an alkaline earth metal and (c) copper alkoxide or cupric nitrate to hydrol...	08/17/1993
5232909	Method for manufacturing superconducting ceramics elongated body A superconducting ceramics elongated body comprising a flexible ceramics elongated substrate and an oxide ceramics superconducting layer formed at least on a part of the surface of the ceramics elongated substrate to longitudinally extend along the cerami...	08/03/1993
5229359	Solution and its use to produce superconducting filaments and coatings Solutions containing the cations of the metals Y, Ba, Cu in the atomic ratio 1:2:3 or the cations of the metals Bi, Sr, Ca and Cu having the atomic ratios of a high-temperature superconductor bound to polyacrylic acid in water as dispersant and having a v...	07/20/1993
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 stoichiometric amounts of metal salts in a solvent to form a so...	07/20/1993
5210069	Preparation method of high purity 115 K Tl-based superconductor A preparation method for high-purity Tl-based superconductor phase of 115 K, and the precursor thereof. The process comprises a specific composition of precursors, represented by the formula: (Tla Pbb Bic)Sr2-x Ca	05/11/1993
5142074	High purity copper alkoxides The invention relates to the preparation of high purity, chloride- and alkali metal-free copper (II) alkoxides by means of the reaction of an alcoholic alkali metal alkoxide solution with copper (II) fluoride; ammoniating the resulting solution to render ...	08/25/1992
5135907	Manufacture of high purity superconducting ceramic A method for the manufacture of superconducting polycrystalline ceramic materials by the decomposition of a mixture of isopropoxides....	08/04/1992
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 ...	06/16/1992
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....	04/21/1992
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 ...	03/31/1992
5087609	Formation of high temperature superconductor thin films by sol-gel techniques A process for forming an alkoxide-derived yttrium-barium-copper oxide high temperature superconductor thin film by sol-gel processing is disclosed. It comprises first forming a thin film comprising solubilized yttrium and barium alkoxides and copper amino...	02/11/1992
5071830	Metalorganic deposition method for forming epitaxial thallium-based copper oxide superconducting films An epitaxial thallium-based copper oxide superconducting film is formed on a crystalline substrate by metalorganic deposition which comprises forming a film of carboxylate soap solution on said substrate, prepyrolyzing said film at a temperature of 350° ...	12/10/1991
5071829	Gel method for preparing high purity Bi-based 110K superconductor using oxalic acid This invention describes the way to prepare high purity Bi-based superconducting powders with the zero resistance temperature at 110K. The technique employs the dissolution of corresponding metal nitrates in deionized water, plus oxalic acid to chelate th...	12/10/1991
5066636	Citrate/ethylenediamine gel method for forming high temperature superconductors A citrate/ethylenediamine gel method for forming oxide superconductors of the Y-Ba-Cu-O, Bi-Ca-Sr-Cu-O, Tl-Ca-Ba-Cu-O system by employing the nitrates of the individual metals and citric acid. Ethylenediamine is then added to form gels. These materials th...	11/19/1991
5026684	Process for preparing ceramic superconductive substances A method is disclosed for preparation of superconductive substances, and in particular, those comprising a rar earth element, barium (Ba), copper (Cu) and oxygen, having a composition represented by the general formula: LnBa2 Cu3 O	06/25/1991
5011796	Sol-gel preparation of polycrystalline strontium barium niobate (SBN) A sol-gel method is disclosed for the production of polycrystalline strontium barium niobate (SBN) materials. Ceramic SBN materials produced in accordance with this method possess favorable ferroelectric properties, and are useful for electro-optic applic...	04/30/1991
5006508	Preparation of copper alkoxides and sol/gel precursors of superconducting ceramics The invention relates to the preparation of high purity, chloride- and alkali metal-free copper (II) alkoxides by means of the reaction of an alcoholic alkali metal alkoxide solution with copper (II) fluoride; ammoniating the resulting solution to render ...	04/09/1991
5004720	Process for producing a superconductor of an oxide system from acetylacetonates A process for producing a superconductor of an oxide system, which comprises uniformly mixing metal elements for constituting the oxide system at least partly in the form of acetylacetonates in a solvent with the rest, if any, being in the form of alkoxid...	04/02/1991
5001110	Organometallic solutions for forming oxide superconducting films A solution for forming a superconductive thin film prepared by dissolving a mol of a compound selected from group A consisting of alkoxides and alkoxyalkoxides of a rare earth metal element; b mol of a compound selected from group B consisting of alkoxide...	03/19/1991
4977109	Process for the preparation of the precursor used in the fabrication of Y--B--CU--O superconductors using a solgel technique This invention provides a process for the preparation of the precursor used in the fabrication of Y--Ba--Cu--O superconductors. This process mainly uses solgel technology via the nitrate route by using a dicarboxylic acid. Among the dicarboxylic acids, ox...	12/11/1990
4962082	Method of making high tc oxide superconductor particles by adjusting pH value and cationic ratio of admixed solution followed by drying, heating and firming Techniques for the preparation of superconducting perovskites in the MBa2 Cu3 O7-y system wherein M represents yttrium of a rare earth element and y is an integer ranging from 0.1 to 0.8 are described. The techniques invol...	10/09/1990
4959347	Forming homogeneous precursers of Bi-Sr-Ca-Cu via carboxylates in the presence of oxidizing agents A process for producing a superconductor of an oxide system, which comprises uniformly dissolving, dispersing or suspending in a solvent metal elements for constituting the oxide system at least partly in the form of carboxylates with the rest, if any, be...	09/25/1990
4956340	Process for preparing compound metal oxides of yttrium, barium and copper A process for preparing compound metal oxides, superconductive compound oxides, is disclosed. The process comprises preparing an aqueous solution containing a predetermined content ratio of chloride, nitrate or acetate of a rare earth metal, an alkaline e...	09/11/1990

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Class 505/735 - By sol-gel process