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81. 发明专利

JPH04171871A OXIDE SUPERCONDUCTOR AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH04171871A
公开(公告)日：1992-06-19
申请号：JP29954890
申请日：1990-11-05
申请人： TOSHIBA CORP
发明人： YAMAMOTO KAZUO , MURASE AKIRA
IPC分类号： H01L39/00 , H01B12/02 , H01B13/00 , H01R4/68
摘要： PURPOSE:To strengthen bonding and to contrive to reduce a contact resistance by embedding at least a part of multiplied terminal materials in an oxide superconductor and by forming them into an integral body through heat treatment. CONSTITUTION:In the compacting stage of an oxide superconductor 1, many linear terminal materials 3c composed of conductive metal are embedded in a terminal-forming part 2 at the time of green-compacting an oxide superconductive calcined powder and its precursor so that it is possible to make oxide superconductive compacts with terminal materials 3 embedded in the terminal-forming part 2. Then, heat treatment is applied to compact the oxide superconductor and to strengthen the connection of terminals. An ordinary soldered connection is sufficient for obtaining dimensions for connecting a normally conductive conductor 4 with the exposed terminal materials 3c.

82. 发明专利

JPH04171870A OXIDE SUPERCONDUCTOR AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH04171870A
公开(公告)日：1992-06-19
申请号：JP29954790
申请日：1990-11-05
申请人： TOSHIBA CORP
发明人： YAMAMOTO KAZUO , MURASE AKIRA
IPC分类号： H01L39/00 , H01B12/04 , H01B13/00 , H01R4/68
摘要： PURPOSE:To reduce the connection resistance in a connection terminal after suppressing an adverse effect on a small thermal conductivity by adding a conductive material to only an oxide superconductor in the vicinity of the connection terminal. CONSTITUTION:La-, Y- and other oxide superconductors are respectively applied as the title oxide superconductor. A conductive material to be added to only the vicinity of a connection terminal is silver, silver oxide or the like. As raw material powder, Y2O3, BaCO3 and CuO are used, and these materials are prepared and mixed so as to be Y:Ba=1:2:3 in atomic ratio and are calcined thereafter. Then, said calcined powder is crushed finely and subsequently green- compacted by a press jig. In this case, the calcined powder obtained by addition of 10wt.% silver powder 2 and by sufficient mixture is used in connection terminals 1 at both ends. After that, heat treatment is applied to said green compact so that it is possible to obtain the bulk material 3 of the oxide superconductor, where silver particles 2 are dispersion-added to only the connection terminal 1.

83. 发明专利

JPH0433272A CONNECTING METHOD FOR SUPERCONDUCTING WIRE 失效
公开(公告)号：JPH0433272A
公开(公告)日：1992-02-04
申请号：JP13722090
申请日：1990-05-29
申请人： TOSHIBA CORP
发明人： SHIBUYA SUMIICHI , SUZUKI MINORU , URATA MASAMI , MAEDA HIDEAKI , MURASE AKIRA , TANAKA MINORU
IPC分类号： H01R4/68 , H01B12/08
摘要： PURPOSE:To feed a large critical current to a connection section by twisting tube-shaped Nb filaments of superconducting wires for connection, then heat- treating the Nb filaments to form Nb3Sn wires. CONSTITUTION:End sections of two superconducting wires manufactured by the tubing method are dipped in a nitric acid solution to dissolve a matrix material 1, and the end sections of the tubular Nb filaments 2 are exposed from the matrix material 1. Two superconducting wires to be connected are arranged in parallel or in series, and filaments 2 exposed from the matrix material 1 are twisted. The twisted portions are connected by the solid phase diffusion connecting method or the ultrasonic connecting method to connect two superconducting wires. The twisted portions of the filaments 2 are covered with the matrix material 1 or a Cu tube 13, it is heated in a vacuum heating furnace, then the filaments 2 and Sn filaments 4 assembled inside are reacted together, and Nb3Sn wires 6 are formed. Two superconducting wires are connected with low resistance, and a large critical current can be fed to a connection section.

84. 发明专利

JPH02247909A MANUFACTURE OF SUPERCONDUCTING LONG SIZED WIRE 失效
公开(公告)号：JPH02247909A
公开(公告)日：1990-10-03
申请号：JP6750289
申请日：1989-03-22
申请人： TOSHIBA CORP
发明人： NAKAMURA SUGURU , SASAKI MITSUO , YAMADA MINORU , MURASE AKIRA
IPC分类号： B28B1/00 , H01B12/06 , H01B13/00
摘要： PURPOSE:To obtain the title superconducting long sized wire having an uniform characteristic by a method wherein at least one surface of a thin plate shaped base material is coated with a low temperature superconducting thin film and is cut in a spiral shape to form each taped wire so that the taped wire is tensioned in the straightening direction after being annealed and is coated with synthetic resin or metal, thus obtaining the long sized wire coated in a range of twisted width or more. CONSTITUTION:For example, a thin doughtnut plate 1, base material, of Ag having 280mm outer dia., 90mm inner dia. and 0.05mm thickness is inserted into a sputtering device arranged wit ha ceramic target of YBCO (Y1Ba2Cu3O2:85 K), so that one surface of the doughtnut plate 1 is coated with a superconducting film of 3mum thickness so as to form a YBCO system superconducting film coated doughtnut plate 3. Successively, the plate 3 is cut in a spiral shape to form taped wires of 1mm width. The taped wire 4 is annealed at 940 deg.C and then is tensioned in the straightening direction to form a taped wire 5, which is immersed into a vinyl chloride resin solution so that it is possible to obtain a superconducting long sized wire covered in a range of a twisted width or more.

85. 发明专利

JPH0293062A FILM FORMING APPARATUS BY LASER LIGHT 失效
公开(公告)号：JPH0293062A
公开(公告)日：1990-04-03
申请号：JP24481188
申请日：1988-09-29
申请人： TOSHIBA CORP
发明人： NAKAMURA SUGURU , SASAKI MITSUO , KINOSHITA JUNICHI , YAMADA MINORU , MURASE AKIRA
IPC分类号： H01L39/24 , B01J19/08 , B01J19/12 , C23C14/24 , C23C14/28 , H01B13/00 , H01L21/20 , H01L21/203
摘要： PURPOSE:To optimally promote the vaporization of a powdery material and the deposition of a metal compound onto a substrate by supplying laser light and a reactant gas in a direction intersecting the supply direction of powdery material, impressing a voltage between electrodes, and producing plasma in the vicinity of a material to be treated. CONSTITUTION:A D.C. high voltage is impressed between a substrate 22 and an electrode 57, and O2 as a reactant gas is supplied into a vacuum vessel 20 and also a powdery material is supplied into the vacuum vessel 20. Since plasma is produced in the vicinity of the substrate 22 by means of glow discharge, the reactant O2 gas is activated. Laser light from a laser light source 29 is transmitted through a transmitting window 30, with which the inside of the vacuum vessel 20 is irradiated. The laser light melts and vaporizes the powdery material, which is allowed to react with the reactant gas to form a compound. This compound is attracted to the substrate 22 and deposited on the substrate 22. The laser light passed over the substrate 22 is allowed to be absorbed by a laser light absorber 42. By this method, a film, e.g., an oxygen-deficient superconductive Perovskite-type lamellar film can be formed on the surface of the substrate 22.

86. 发明专利

JPH01258832A SUPERCONDUCTOR 失效
公开(公告)号：JPH01258832A
公开(公告)日：1989-10-16
申请号：JP8767688
申请日：1988-04-09
申请人： TOSHIBA CORP
发明人： YAMADA MINORU , MURASE AKIRA
IPC分类号： B21F19/00 , H01B12/02 , H01L39/12
摘要： PURPOSE:To increase the current capacity of the oxide superconductor contg. Bi, Sr, Ca, and Cu at specific atomic ratios or Tl, Ba, Ca, and Cu at specific atomic ratios and to increase the critical current density thereof by packing the above-mentioned superconductor into a metal pipe and rolling the pipe to a laminar state of a specific thickness. CONSTITUTION:Powder 2 of the oxide superconductor is packed into the metal pipe 1 and both ends thereof are sealed. The oxide superconductor contains the Bi, Sr, Ca, and Cu at 2:2:1:2 or 2:2:2:3 by atomic ratios or the Tl, Ba, Ca, and Cu at 2:2:1:2 or 2:2:2:3 by atomic ratios. The oxide superconductor 2 is rolled together with the metal pipe 1 to the laminar state of

87. 发明专利

JPH01159912A MANUFACTURE OF SUPERCONDUCTING CURRENT-LIMITING ELEMENT 失效
公开(公告)号：JPH01159912A
公开(公告)日：1989-06-22
申请号：JP31615887
申请日：1987-12-16
申请人： TOSHIBA CORP
发明人： OKAMOTO MASARU , MIZOGUCHI HITOSHI , IKEDA HISATOSHI , YAGIU SATORU , OKUMA HIDEO , MURASE AKIRA
IPC分类号： H01B12/04 , H01B13/00 , H01L39/16 , H02H9/02
摘要： PURPOSE:To increase the resistance value after quenching and improve the cooling efficiency, in a current-limiting element manufactured by using ceramic superconductor, by calcinating a wire so as to form a nonconductive type after melting the sheath of the wire which has been temporarily sintered by using the sheath such as of silver. CONSTITUTION:A current limiting element is formed by binding a wire by melting and sintering the wire after temporarily sintering and compacting the wire by using a copper or silver sheath. A ceramic superconductor is once temporarily sintered to compound a superconductor 1, which is molded and further sintered. After temporarily sintering and molding the wire in a copper or silver sheath, the sheath is melted by nitric acid or the like to produce a bare wire, which is sintered to produce a long element without sheath. Next, the wire is binded to get a required sectional area and fixed on an insulating plate 2 in nonconductive winding. Thereby, the long current limiting element can be obtained, the cooling efficiency is excellent because of the large sectional area of the wire contacting liquid nitrogen, the quick transfer to superconducting from normal conducting after recovering short-circuit fault becomes possible, and the circuit can be reclosed at high speed.

88. 发明专利

JPH01146214A MANUFACTURE OF SUPERCONDUCTOR WIRE MATERIAL 失效
公开(公告)号：JPH01146214A
公开(公告)日：1989-06-08
申请号：JP30653687
申请日：1987-12-03
申请人： TOSHIBA CORP
发明人： YAMADA MINORU , NAKAYAMA SHIGEO , MURASE AKIRA
IPC分类号： C01B13/32 , C01G1/00 , C04B35/00 , C04B35/45 , C04B41/80 , H01B12/06 , H01B13/00
摘要： PURPOSE:To securely obtain a superconductor wire material of an excellent superconductivity such as the critical current density, etc., by spraying a fused oxide superconductor on a long size base material. CONSTITUTION:An oxide superconductor, a material including a substance to be an oxide superconductor by heating, or a material which consists of a mixture of element units to compose an oxide superconductor, is heated and fused, and the resultant fusion is sprayed on a long size basic material to form a membrane which is quenched immediately. And the base material with the membrane is heat-treated in an ambiance including oxygen. As the oxide superconductor, many kinds of substances are available, but a perovskite structure oxide superconductor including a rare earth element is used with a practical effectiveness. In such a composition, a wire material consisting of a dense oxide superconductor can be obtained easily.

89. 发明专利

JPH01115805A PRODUCTION OF OXIDE SUPERCONDUCTOR 失效
公开(公告)号：JPH01115805A
公开(公告)日：1989-05-09
申请号：JP27395287
申请日：1987-10-29
申请人： TOSHIBA CORP
发明人： YAMADA MINORU , NAKAYAMA SHIGEO , MURASE AKIRA , HORIGAMI TORU
IPC分类号： C01G3/00 , C01B13/14 , C01G1/00 , H01B12/02 , H01B13/00 , H01L39/24
摘要： PURPOSE:To facilitate formation of an oxide superconductor, formable into various shapes, by one heat treatment, by fast sticking specific two kinds of alloys containing elements constituting the oxide superconductor each other and heat-treating. CONSTITUTION:The first alloy consisting of at least two of elements constituting an oxide superconductor and the second alloy comprising an element which constitutes the oxide superconductor and not contained in the first alloy, at least as a constituent component are at least used. These alloys are fast stuck each other, processed into a desired shape and heat-treated in an oxygen- containing atmosphere to give the aimed superconductor. An oxide superconductor of perovskite type having a high critical temperature and containing a rare earth element has high effects of practical use as the oxide superconductor used. The superconductor may develop a superconducting state and an oxide having a perovskite structure of oxygen defect type shown by the formula may be cited as the oxide superconductor.

90. 发明专利

JPH01100006A PRODUCTION OF ALUMINUM NITRIDE POWDER 失效
公开(公告)号：JPH01100006A
公开(公告)日：1989-04-18
申请号：JP25735887
申请日：1987-10-14
申请人： NIPPON LIGHT METAL CO , TOSHIBA CORP
发明人： KOKUNI MASANORI , ICHIKAWA HACHIRO , MURASE AKIRA , OZAWA HIROO , TSUGE AKIHIKO
IPC分类号： C01B21/072
摘要： PURPOSE:To obtain in a short time the titled fine powder favorable for the production of sintered forms with high thermal conductivity, by incorporating a solid organic compound in a mixture of alumina and carbon followed by reaction between the resultant mixture and N2 gas. CONSTITUTION:First, a mixture of alumina powder and carbon powder is incorporated with specified amount of a solid organic compound followed by thoroughly mixing. The resultant mixture is packed in e.g. a carbon tray and placed in an electric furnace followed by rise of temperature to perform nitrification while passing a N2 gas stream. Said solid organic compound is a compound to be carbonized either as solid phase or through gaseous phase (not through liquid phase) when heated, being e.g. phenolformaldehyde resin, polyvinylidene chloride, polyphenylene, cellulose. These compounds are normally used in the form of fine powder; however, said mixture of alumina and carbon may be placed on or between the foamed sheets(s) or film(s) made thereof.

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