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91. 发明专利

JPH06275153A MANUFACTURE OF COMPOSITE SUPERCONDUCTING WIRE AND COMPOSITE SUPERCONDUCTING COIL 失效
公开(公告)号：JPH06275153A
公开(公告)日：1994-09-30
申请号：JP16241193
申请日：1993-06-30
申请人： MITSUBISHI ELECTRIC CORP
发明人： HIGUMA HIROKO , KUBO YOSHIO , EGAWA KUNIHIKO , NAGAI TAKAYUKI , MIYASHITA SHOJI , UCHIKAWA HIDEFUSA
IPC分类号： C22F1/00 , H01B12/10 , H01B13/00
摘要： PURPOSE:To provide a manufacturing method for a composite superconducting wire whereby critical current density can be enhanced in a shorter time than by conventional methods and hysteresis loss and AC loss can be reduced. CONSTITUTION:A composite material is machined for reducing its cross section and is then heat treated to manufacture a composite superconducting wire. The composite material comprises an Sn-base alloy rod 3 embedded at the center of the column of Cu 1 in which an Nb core 2 is embedded, and an Sn sheet 3 wound on the outer peripheral portion of the column by two turns. The composite material contains 2.8 to 3.5 gram atom of Nb per one gram atom of Sn, and the minimum segmented area (SS), the overall volume (St) and the number (n) of segments of the Sn-base alloy meet the following expression: (n)XSSX100/St>=10%.

92. 发明专利

JPH06251929A MANUFACTURE OF OXIDE SUPERCONDUCTING COIL 失效
公开(公告)号：JPH06251929A
公开(公告)日：1994-09-09
申请号：JP3505393
申请日：1993-02-24
申请人： MITSUBISHI ELECTRIC CORP
发明人： MIYASHITA SHOJI , USAMI AKIRA , UCHIKAWA HIDEFUSA
IPC分类号： H01F6/06 , H01F5/08
摘要： PURPOSE:To obtain an oxide superconducting coil having a highly generated magnetic field by a method wherein an insulative film and a normal conductive metal layer are formed on an oxide wire material, which is turned into a superconductor by a heat treatment, by an oxidation and thereafter, the wire material is molded into a coil form and this coil is subjected to heat treatment and oxidation treatment. CONSTITUTION:Raw powders, which consist of oxides of a Bi2O3 and a CuO and carbonates of SrCO3 and CaCO3, which are blended in such a way that oxide powder is blended in a compositional ratio of Bi2Sr2Ca1Cu2O8 when the raw powders are subjected to heat treatment and are formed into the oxide powder, are mixed with one another and thereafter, the mixture is calcined in the air. Then, a load is applied to this oxide powder by an oil pressure press to form a cylindrical pellet, and this pellet is inserted in an Ag pipe and moreover, is inserted in an Nb pipe to form a composite material 3 consisting of oxides 1-Ag and 2-Nb. A wire material obtained by processing this composite material is wound into a solenoid form to form a coil and this coil is subjected to heat treatment in the air to obtain an oxide superconducting coil. Thereby, it becomes possible to manufacture an oxide superconducting coil having a highly generated magnetic field.

93. 发明专利

JPH01130745A SEPARATION OF SUPERCONDUCTING MATERIAL AND DEVICE THEREFOR 失效
公开(公告)号：JPH01130745A
公开(公告)日：1989-05-23
申请号：JP28988087
申请日：1987-11-17
申请人： MITSUBISHI ELECTRIC CORP
发明人： WAKATA MITSUNOBU , MIYASHITA SHOJI , MATSUNO SHIGERU
IPC分类号： B03C1/00 , B03C1/02 , B03C1/021 , H01B13/00 , H01L39/00
摘要： PURPOSE:To efficiently separate and recover only the superconductive material having a critical temp. higher than an optional value from a mixture of the superconductive materials having different critical temps. and the non- superconductive material by horizontally introducing the mixture into a vertical magnetic field along with a carrier gas such as helium. CONSTITUTION:The mixture 4 is adjusted to a specified temp. by a thermostatic bath 7, and supplied into a horizontal pipe 2 of a nonmagnetic material through its one end from a mixture feeder 3 along with the carrier gas introduced from a carrier gas inlet 6. Meanwhile, a vertical magnetic field is formed by a magnet 1. A superconductive material 9 exhibiting superconductivity at that temp. in the mixture introduced into the magnetic field cannot get into the magnetic field, and is dropped and recovered in a recovery vessel 8. Conversely, the non-ferromagnetic and non-superconductive material 11 is passed through the magnetic field, separated from the carrier gas by a filter 10, and recovered in a recovery vessel 13. The ferromagnetic non-superconductive material is attracted by the magnet 1, and separated.

94. 发明专利

JPH01100054A PRODUCTION OF OXIDE SUPERCONDUCTOR 失效
公开(公告)号：JPH01100054A
公开(公告)日：1989-04-18
申请号：JP25685887
申请日：1987-10-12
申请人： MITSUBISHI ELECTRIC CORP
发明人： MIYASHITA SHOJI
IPC分类号： H01B12/00 , C01G1/00 , C04B35/00 , C04B35/45 , H01B13/00 , H01L39/24
摘要： PURPOSE:To contrive to improve critical current density and mechanical strength of superconducting material, by blending a raw material of oxide superconductor with =20wt.% Li2CO3 will not show superconducting characteristics.

95. 发明专利

JPH0196905A MANUFACTURE OF SUPERCONDUCTING COIL 失效
公开(公告)号：JPH0196905A
公开(公告)日：1989-04-14
申请号：JP25596587
申请日：1987-10-08
申请人： MITSUBISHI ELECTRIC CORP
发明人： MIYASHITA SHOJI
IPC分类号： H01B12/06 , H01B13/00 , H01F6/06
摘要： PURPOSE:To minimize thermal shrinkage and prevent the characteristic deterioration because of stress of a superconducting coil, by using oxide chips which are mode by sintering a material powder where its blending is carried out to form an oxide having superconductivity as well as the oxide holding superconducting characteristics by heat-treatment. CONSTITUTION:Chips 10 made of sintered oxide are placed in slots 6a which are provided in the spiral form in a bobbin and a temporarily burnt powder where a burnt body of polyvinyl bytyral (PVB) is pulverized is bonded onto the chips 10 from the upper part of the chips 10. And then, an Ag plate 8 is welded so that the spiral slots 6a are cooled with the exception of their parts of introduction and exhaust ports of gases to form spiral tubes. And then, oxygen or a gas with oxygen is introduced into each spiral tube, that is, a cavity 9 through the above gas introduction and exhaust ports. Then the mainframe of this coil is treated with heat in a vacuum or in an atmosphere of inactive gas to manufacture a superconducting coil.

96. 发明专利

JPS63274619A PRODUCTION OF OXIDE SUPERCONDUCTOR 失效
公开(公告)号：JPS63274619A
公开(公告)日：1988-11-11
申请号：JP10746587
申请日：1987-04-30
申请人： MITSUBISHI ELECTRIC CORP
发明人： YOSHIZAKI KIYOSHI , FUJIWARA FUMIO , WAKATA MITSUNOBU , MIYASHITA SHOJI , KUBO YOSHIO , NAGAI TAKAYUKI
IPC分类号： H01L39/12 , C01G1/00 , C01G3/00 , C04B35/00 , C04B35/45 , H01B12/00 , H01B13/00 , H01L39/24
摘要： PURPOSE:To improve critical current and mechanical strength of an oxide superconductor by adding a chloride of an element of the group Ia, IIa, IIIa or Ib of the periodic table to powder of a starting material which generates a superconductive oxide by heat treatment or which has already superconductivity. CONSTITUTION:Powder (99.99% purity, about 10mu mean particle size) of a starting material consisting, for example, of BaCO3, Y2O3, and CuO which have been mixed in a compsn. (Y0.4Ba0.6)3Cu3O7 which exhibits superconductivity when it is transformed to oxides by heat treatment, is mixed sufficiently. A specified amt. of NaCl powder is added to the powder mixture and mixed further well by stirring. The powder mixture is pressed by hydraulic pressure to form pellets having a specified shape, then the pellets are sintered after executing heat treatment. By this method, an oxide superconductor having higher critical current and mechanicals strength than conventional products is obtd.

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