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| Number | Title | Issue Date |
| 7361627 | Method of preparing oxide superconducting film The present invention relates to a method of preparing an oxide superconducting film, the method includes reacting a metal acetate containing metal M selected from the group consisting of lanthanum, neodymium and samarium with fluorocarboxylic acid having not less t... | 04/22/2008 |
| 7014881 | Synthesis of multi-element oxides useful for inert anode applications An inert anode 50, for use in an electrolytic cell 12 for producing metals such as aluminum, is made by providing chemical source materials 100 such as at least two of metal salts, metal particles, or metal oxides and dissolving them to form a s... | 03/21/2006 |
| 6586042 | Method of preparing oxide superconductor with purified mixed metal trifluoroacetate An aqueous solution of mixed metal acetate including one kind or more of element selected from lanthanide series and yttrium, barium and copper is mixed with trifluoroacetic acid to prepare a solution of mixed metal trifluoroacetate. From a solution of mi... | 07/01/2003 |
| 6365555 | Method of preparing metal containing compounds using hydrodynamic cavitation A process for the preparation of nanostructured materials in high phase purities using cavitation is disclosed. The method comprises mixing a metal containing solution with a precipitating agent and passing the mixture into a cavitation chamber. The chamb... | 04/02/2002 |
| 5981445 | Process of making fine ceramic powders from aqueous suspensions The new preparation process for making fine high specific surface ceramic powders suitable as catalysts or precursors for ceramics uses lanthanum (or other rare earth lanthanide) oxide as one of the precursors. The oxide is mixed with water to form a liqu... | 11/09/1999 |
| 5869432 | Method for producing ceramic superconductor single crystals A bulk high temperature superconductor single crystal having the formula MBa2 Cu3 O7-x wherein M is selected from the group consisting of Y, Sm, Eu, Gd, Dy, Ho, Er, and Yb; and, x has a number value from about 0.1 to about... | 02/09/1999 |
| 5703021 | Process for making high temperature Bi-Sr-Ca-Cu oxide superconductor A description is given of superconducting substances having a content of Bi, Sr, Ca and Cu, and of processes for their preparation from the metal oxides within a range which is specified by the overall composition Bia (Sr,Ca)b -Cu | 12/30/1997 |
| 5652199 | Method of manufacturing oxide superconductor A method of manufacturing an oxide superconductor, including the steps of mixing oxide materials of the metals contained in an oxide superconductor represented by HgBa2 Ca2 Cu3 O8+y to prepare a powder mixture o... | 07/29/1997 |
| 5563117 | Copper oxide superconductor, a process for its production, and a copper used therein In the production of a 124-type or 123-type superconductor by a sol-gel method using alkoxides of respective metals, the use of a compound wherein a secbutoxy group and a hydroxy group are coordinated with a copper atom gives a superconductor composed of ... | 10/08/1996 |
| 5484766 | Preparation of Bi-Pb-Sr-Ca-Cu-O (2223) superconductors A method for synthesizing ultrahomogeneous nanoparticles of precursor powder by coprecipitation in a water and oil microemulsion is disclosed. The powder is compressed and sintered to prepare an essentially pure 2223 superconductor.... | 01/16/1996 |
| 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 the group comprising Y, La, Tl, Pb and the rare earths, for... | 10/10/1995 |
| 5449660 | Method of producing compound oxide by using partly citrating process A method of producing a compound oxide of elements including at least one of thallium, bismuth, lead, antimony, yttrium, each of rare earth elements, each of transition metal elements, each of alkali metal elements and each of alkaline earth metal element... | 09/12/1995 |
| 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, barium and copper in an acid pH-controlled water-containi... | 12/27/1994 |
| 5304536 | Process for making superconductor powder An improved process for preparing a superconducting composition having the formula MW AE CuV OK wherein M is selected from the group consisting of Bi, Tl, Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm Yb and Lu; A is at lea... | 04/19/1994 |
| 5290759 | Process for making high temperature superconducting powders Superconducting precursors, which can be made into metal oxide superconductors such as YBa2 Cu3 O6+x, and a process for their manufacture by the coprecipitation of 1-2-3 nitrates using inexpensive precipitating agents such... | 03/01/1994 |
| 5262026 | Method of manufacturing a device having a superconducting film In a method for manufacturing a device having a film of high temperature superconductor, a copper substrate is used in the electrophoretic deposition as a cathode on which fine powders of superconductor should be deposited, and the fine powders deposited ... | 11/16/1993 |
| 5244872 | Method of preparing Pb-Sr-Ca-Ln-Ca-O metal oxide superconductor An oxide superconductor having the following formula: Pb2 Sr2 Ca1-p Lnp Cu3 Oq or Pb1-x Cux Sr2 Ca1-y Lny Cu2 Oz wherein Ln rep... | 09/14/1993 |
| 5238914 | Process for producing a high-temperature superconductor containing bismuth, strontium, calcium and copper The invention relates to a process for producing a bismuth-, copper-, strontium- and calcium-containing high-temperature superconductor, in which an aqueous solution is produced which has a pH of 0.5-4 and which contains the metals in an atomic ratio corr... | 08/24/1993 |
| 5206215 | Process for obtaining precursors for high critical temperature superconductor ceramics comprising a first and second precipitation A process for obtaining precursors for high critical temperature superconductor ceramics by precipitating salts which are insoluble in water comprises the following stages: A starting solution of soluble salts is prepared in which the cations are in the s... | 04/27/1993 |
| 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 because the reaction progresses in liquid solution. For exampl... | 04/06/1993 |
| 5152973 | Synthesis of submicron powders under reduced oxygen pressure The invention process provides a metal oxide, or oxides of more than one more metal, wherein the oxides have a mean particle size less than 1 micron. The oxides are made by steps including (1) reacting an aqueous solution of a metal salt (or salts) that f... | 10/06/1992 |
| 5149682 | Manufacturing method for superconducting ceramics and products thereof Superior homogeneity in ceramic materials is achieved by reacting certain soluble metal salts with quaternary ammonium carbonates to form co-precipitated metal carbonates. The precipitate can be recovered and processed to make superconductors. For example... | 09/22/1992 |
| 5147848 | Precipitation process for forming Bi-Pb-Sr-Ca-Cu-O superconductors by dissolving nitrate salts in acid and adding a solution of triethylamine and oxalic acid A process for preparing powder of high temperature oxide superconductors of Bi-Pb-Sr-Ca-Cu-O type. In an aqueous solution of nitrate salts of Bi, Pb, Sr, Ca, and Cu metals, an appropriate ratio of triethylamine/oxalic acid was added to form a coprecipitat... | 09/15/1992 |
| 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 |
| 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... | 06/16/1992 |
| 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... | 04/21/1992 |
| 5077265 | Co-precipitation synthesis of precursors to bismuth-containing superconductors A co-precipitation synthesis of precursors to bismuth-containing ceramic superconducting materials is disclosed in which bismuth and at least one other approrpiate metal are dissolved in a non-aqueous acidic solvent, which are then recovered as a homogene... | 12/31/1991 |
| 5028585 | Superconducting oxide FCC oxide composite compositions and method of making such compositions Two or more superconductors are reacted together to form a non-superconducting phase encapsulating a residual superconducting phase. For example YBa2 Cu3 oxide is reacted with Bi2 Sr2 CaCu2 oxide to f... | 07/02/1991 |
| 5021397 | Synthesis of ceramic superconductor CPO from xenotyme A process for the preparation of a superconductor of the type AB2 Cu3 O7-x, wherein A is a mixture of rare earths, B is an alkaline earth metal and x is less than one, comprising the treatment of xenotime to obtain a rare ... | 06/04/1991 |
| 5019555 | High purity superconducting compositions and methods for their fabrication The present invention is related to a composition and methods for producing highly pure, high temperature superconducting materials having the general formula MBa2 Cu3 O7-x, where M is yttrium or a rare earth element and x... | 05/28/1991 |
| 5011822 | Preparation of a uniform mixed metal oxide and superconductive oxides A method for producing uniform mixed metal oxides, such as superconducting mixtures including Y1 Ba2 Cu3 O7-x, in which such metals are precipitated as their oxalates from alcoholic solutions of the metals as th... | 04/30/1991 |
| 5011819 | Process using supercritical conditions for producing highly accurate and homogeneous powder mixture useful in fabrication of high quality ceramic superconductors A process is disclosed for the formation of a uniform and homogeneous mixture of a plurality of compounds in a desired stoichiometric ratio as a precipitate from a fluid under supercritical processing conditions which comprises dissolving at a first super... | 04/30/1991 |
| 5002926 | Ceramic composition Improved process for making Tl-Ca-Ba-Cu oxide superconductors. A solution of the nitrated of Ca, Ba, and Cu is reacted with a quaternary ammonium carbonate in a slurry (heel) of Tl2 O3. Carbonates of Ca, Ba, and Cu precipitate homoge... | 03/26/1991 |
| 5001107 | Method for the preparation of thallium-containing superconducting materials by precipitation This invention provides improved methods for the preparation of precursor powders that are used in the preparation of superconducting ceramic materials that contain thallium. A first solution that contains the hydrogen peroxide and metal cations, other th... | 03/19/1991 |
| 5001109 | Ceramic composition Improved process for making Bi-Pb-Sb-Sr-Ca-Cu oxide superconductors. A solution of the nitrates of Bi, Pb, Sr, Ca, and Cu is reacted with a quaternary ammonium carbonate in a dispersion (heel) of Sb2 O5. Carbonates of Bi, Pb, Sr, Ca,... | 03/19/1991 |
| 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 |
| 4904638 | Method of producing superconducting ceramics by co-precipitation of carbonates A process is disclosed for producing a homogeneous mixture of co-precipitated carbonate salts capable of reacting together in an oxygen atmosphere at an elevated temperature to form a superconducting ceramic which comprises forming a first solution by dis... | 02/27/1990 |
| 4900715 | Method of preparing superconducting "orthorhomibic"-type compounds in bulk using C1 -C6 alkanoic acid salts Superconducting compositions of the general formula An Qm Cu3 Oy are prepared by wet mixing a combination organic acid salts, inorganic acid salts and oxides of A, Q and Cu, wherein at least one salt is an organ... | 02/13/1990 |
| 4898851 | Process for making 90 k superconductors using a spray dried oxalate precursor There is disclosed an improved process for preparing a superconducting composition having the formula MBa2 Cu3 Ox wherein M is selected from the group consisting of Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu; x is from a... | 02/06/1990 |
| 4895832 | Coprecipitation method for producing superconducting oxides of high homogeneity A homogenous coprecipitation method by which superconducting oxides having perovskite-like structure, such as YBa2Cu307-x, can be produced in mass, in which urea is used as solvent to adjust and control the PH value of an aqueous nitrate solution. The cop... | 01/23/1990 |
