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61. 发明专利

JPH0464124B2 失效
公开(公告)号：JPH0464124B2
公开(公告)日：1992-10-14
申请号：JP8951384
申请日：1984-05-07
申请人： FURUKAWA ELECTRIC CO LTD
发明人： TANAKA YASUZO , KONISHI KENJIRO
IPC分类号： C22C1/00 , C22C9/00 , C22C27/00 , C22F1/00 , C22F1/16 , C22F1/18 , H01B12/10 , H01B13/00

62. 发明专利

JPH04255615A MANUFACTURE OF OXIDE SUPERCONDUCTING WIRE ROD 失效
公开(公告)号：JPH04255615A
公开(公告)日：1992-09-10
申请号：JP1787191
申请日：1991-02-08
申请人： FURUKAWA ELECTRIC CO LTD
发明人： TANAKA YASUZO , MIMURA MASANAO
IPC分类号： B21F99/00 , H01B12/04 , H01B13/00
摘要： PURPOSE:To easily produce a wire rod excellent in superconducting property by continuously providing a wire rod made of Ag or a silver alloy in the longitudinal direction inside of a linear body composed of a raw material for an oxide superconductor. CONSTITUTION:As the method for providing wire rods 13 made of Ag or a silver alloy; (a) an oxide superconductor raw material 10 is formed into a linear body 11 by compression forming or the like, followed by forming holes 12 of the desired dimensions, and being succeeded by inserting the wire rods 13 therein; or (b) an oxide superconductor raw material 15 is filled in a metal sheath 14, followed by forming a metal sheath composite 16, and being succeeded by forming holes 12 in the raw material portion such that the wire rods 13 are inserted therein; in this case (c) when at least one wire rod 13 is continuously provided in the longitudinal direction of the raw material portion, other wire rods 17 may be dispersed short. Linear bodies 11 and 16 are reduced in area by a reduction-of-area working such as an extrusion, a drawing, etc., followed by heat treatment so as to produce an oxide superconducting wire.

63. 发明专利

JPH04184819A MANUFACTURE OF OXIDE SUPERCONDUCTING WIRE 失效
公开(公告)号：JPH04184819A
公开(公告)日：1992-07-01
申请号：JP30862490
申请日：1990-11-16
申请人： FURUKAWA ELECTRIC CO LTD
发明人： TANAKA YASUZO , KIKUCHI SUKEYUKI
IPC分类号： B21F19/00 , H01B12/04 , H01B13/00
摘要： PURPOSE:To produce a wire with a superconductive characteristic and without no defect such as of swelling by interposing in a composite billet any one of material selected from metal elements of the fourth and fifth group in the periodic table of Mendelejeff and these alloy and the like, over the whole length in the longitudinal direction. CONSTITUTION:Raw material for oxide superconductive body such as Bi, Ti, Y group and the like is used to prepare a powder material for oxide superconductive body. Namely, oxide including a constituent element and primary material powder of carbonate are blended and mixed to have a specified composition and temporality baked, and then crushed to powder. The powder material 1 is filled in a pipe 4, and at the same time at the center a rod-shaped or tube-shaped long-sized metal body 2 made of metal of the 4A and 5A group in the periodic table of Mendelejeff or the alloy thereof is provided to form a composite billet. The billet is plastically worked to have a composite wire with a required shape and size.

64. 发明专利

JPH04144012A SUPERCONDUCTIVE WIRE MEMBER AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH04144012A
公开(公告)日：1992-05-18
申请号：JP26810390
申请日：1990-10-05
申请人： FURUKAWA ELECTRIC CO LTD
发明人： MIURA DAISUKE , MATSUMOTO KANAME , TANAKA YASUZO
IPC分类号： B21F19/00 , H01B12/06 , H01B12/10 , H01B13/00
摘要： PURPOSE:To obtain a superconductive member with a greatly increased critical current density by specifying the position of permanent-conductive substance layers in the superconductive member when arranging side by side the units each of superconductive substance layers and permanent-conductive substance layers laminated thereon in its longitudinal direction to provide a superconductive wire member. CONSTITUTION:The disposition of a permanent-conductive substance layer existing in a superconductive wire member is defined as one which is represented by the formula [I]. Namely, the formula [I] is a1 (m)=1.07X(phi0/B) where phi0 represents the unit of quantum magnetic flux (207X10 T) and B the magnetic flux density (the unit is T) of the magnetic field used. In this way, the interval (al) between the magnetic flux gratings is approached to the value obtained from the formula [I] above while the density of the permanent-conductive substance layer is defined to range from 10 to 50% of the volumetric ratio as defined by the formula [II], which is in the form of 'Volumetric Ratio (%)=(Volume of Permanent Conductive Substance Layer)/(Volume of Filament)X100'. Namely, a base member tape 10 and superconductive substance or permanent-conductive substance pattern 12 are alternately disposed, whereby the wire member is reduced in diameter and then is elongated.

65. 发明专利

JPH0393112A MANUFACTURE OF NB3-AL SERIES COMPOUND SUPERCONDUCTIVE WIRE 失效
公开(公告)号：JPH0393112A
公开(公告)日：1991-04-18
申请号：JP22849989
申请日：1989-09-04
申请人： FURUKAWA ELECTRIC CO LTD
发明人： TANAKA YASUZO , MATSUMOTO KANAME , SANO TAKAYUKI , YAMADA KIYOSHI
IPC分类号： C01G33/00 , C01G1/00 , C22C27/02 , H01B12/10 , H01B13/00
摘要： PURPOSE:To obtain high critical current density Jc by loading a pressure of a specific range within a specific range of temperature upon a wire rod prepared through the process of compounding Nb or its alloy with Al or its alloy. CONSTITUTION:A pressure of a range from not less than 1MPa to not more than 103MPa within the range of a temperature of not more than 950 deg.C is loaded onto a wire rod prepared through the process of compounding Nb or its alloy with Al or its alloy. Execution of such diffused heat treatment within the range of a pressure of not less than 1MPa but also not more than 103MPa at the temperature of not more than 950 deg.C like this provides high critical current density Jc of a Nb3-Al series compound superconducting wire without causing a reduction in the diameter of a filament to such an extent as not more than 0.07mum and in such an industrially treatable time as 103 to 105SEC with regard to also the heat treatment time, with insusceptibility of the Jc to any mechanical strain as well.

66. 发明专利

JPH0245283B2 失效
公开(公告)号：JPH0245283B2
公开(公告)日：1990-10-09
申请号：JP19013982
申请日：1982-10-29
申请人： FURUKAWA ELECTRIC CO LTD
发明人： TANAKA YASUZO
IPC分类号： C22C1/00 , C23C10/28 , H01B12/10 , H01B13/00 , H01F6/06 , H01L39/24

67. 发明专利

JPH02163353A DIFFUSION HEAT TREATMENT FOR NB3AL-TYPE SUPERCONDUCTOR 失效
公开(公告)号：JPH02163353A
公开(公告)日：1990-06-22
申请号：JP31713488
申请日：1988-12-15
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SHIMIZU HITOSHI , SANO TAKAYUKI , TANAKA YASUZO
IPC分类号： C22F1/00 , H01B12/04 , H01B12/10 , H01B13/00 , H01B13/08
摘要： PURPOSE:To inhibit the formation of an intermediate reaction product and to obtain superior superconductivity by subjecting an Nb3Al-type composite wire to temp. rise under specific conditions and then applying diffusion heat treatment to the above. CONSTITUTION:An Nb3Al-type composite wire or composite-wire formed body formed into the desired shape is subjected to temp. rise while regulating the temp.-rise rate in the temp. range of 300-600 deg.C to >=200 deg.C/hr. By this method, a superconductor free from the formation of NbAl3 at

68. 发明专利

JPH0214869A PRODUCTION OF RAW MATERIAL POWDER FOR CERAMIC SUPERCONDUCTOR 失效
公开(公告)号：JPH0214869A
公开(公告)日：1990-01-18
申请号：JP16474787
申请日：1987-07-01
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SHINTOMI KOICHI , MAEDA TATSU , TANAKA YASUZO , FUKUOKA SHINGORO
IPC分类号： H01L39/12 , C01G1/00 , C04B35/00 , C04B35/45 , C04B35/653 , H01B12/00 , H01B13/00
摘要： PURPOSE:To improve the formability of a green compact, promote the densification and improve the superconductivity by introducing a molten raw material composition into an oxygen gas jet to form spherical fine powder. CONSTITUTION:Raw material powder is put into a zirconia crucible 1 and melted by heating with a high-frequency heating furnace 2 made of carbon. The molten raw material 3 is discharged through a nozzle at the bottom of the zirconia crucible 1 and blasted with an oxygen gas jet 4 to form powder. The oxygen gas jet 4 is produced by connecting an oxygen bomb 6 to a pipe 5 furnished with a nozzle and vigorously ejecting oxygen gas through the nozzle. A green compact is formed with the powder, heated in an oxygen stream at a specific temperature and slowly cooled. The densification of the powder is promoted and the superconductivity is improved by this process.

69. 发明专利

JPH01320710A MANUFACTURE OF SUPERCONDUCTIVE CABLE IN MULTICORE TYPE OXIDE LINE 失效
公开(公告)号：JPH01320710A
公开(公告)日：1989-12-26
申请号：JP15448088
申请日：1988-06-22
申请人： FURUKAWA ELECTRIC CO LTD
发明人： KIKUCHI SUKEYUKI , TANAKA YASUZO , OKANIWA KIYOSHI , TAKAHASHI HIROO , OGAWA KIYOSHI , KURIHARA TAKESHI
IPC分类号： C04B35/00 , C01G1/00 , C01G3/00 , C04B35/45 , H01B12/10 , H01B13/00
摘要： PURPOSE:To obtain a multicore type superconductive cable high in critical current density by contacting R1-A2-Cu3 oxide in composition deviated from the composition R-A-Cu showing superconductive characteristics with mixed oxide consisting of Ba and Cu continuously in the longitudinal direction at plural contacts interfaces so as to form it, and then applying oxidizing and specific cooling treatments. CONSTITUTION:A column having plural holes is formed using powder of Y2Ba1Cu1O5, and mixture of BaO powder and CuO powder which is formed in bar shape in advance is inserted into the columnar hole and compounded, and this is protruded so as to thin the diameter. This thin line is twisted in hot atmosphere and heated in O2, and Y1Ba2Cu3O7-x phase 2 is formed at the contact interface between Y2Ba1Cu1O5 phase 1 and (BaO+CuO) phase 3, whereby multicore type superconductive cable can be obtained. At this time, it can also be made into a multicore type superconductive cable consisting of Y2Ba1Cu1O5 phase 1 and Y1Ba2-Cu3O7-x phase 2 by making the phase 3 disappear completely by selection of treatment conditions such as extension of treatment time, etc. Also, a reinforcing core material 4 can be arranged at the center of the mixture 3 of BaO powder and CuO powder in advance as well. If necessary, the periphery is covered with Al, Cu, etc.

70. 发明专利

JPH01183450A PRODUCTION OF FORMED OXIDE SUPERCONDUCTOR 失效
公开(公告)号：JPH01183450A
公开(公告)日：1989-07-21
申请号：JP549088
申请日：1988-01-13
申请人： FURUKAWA ELECTRIC CO LTD , HOKKAIDO ELECTRIC POWER , TOHOKU ELECTRIC POWER CO , TOKYO ELECTRIC POWER CO , ELECTRIC POWER DEV CO
发明人： ENOMOTO KENJI , UNO NAOKI , TANAKA YASUZO , OKANIWA KIYOSHI , TAKAHASHI HIROO , MURAKAMI HIROMI , YASUDA MASASHI
IPC分类号： H01L39/24 , C01B13/14 , C01G1/00 , C04B35/00 , C04B35/45 , C04B41/80 , H01B12/00 , H01B13/00
摘要： PURPOSE:To obtain the title formed material having uniform composition and crystal structure, high density and high critical temperature and critical current density, by calcining powdery raw materials of an oxide superconductor under respective specific conditions, crushing, forming and sintering the powder and heat-treating the product. CONSTITUTION:Powdery raw materials (e.g., Y2O3, BaCO3 and CuO) of an oxide superconductor are mixed at specific ratios and calcined by heating at 500-1000 deg.C in an atmosphere having partial O2 pressure of 10 -20Torr. The calcined product is crushed, classified and formed into a desired form. The formed product is sintered by heating at 700-950 deg.C in an atmosphere having partial O2 pressure of 10 -20Torr and heat-treated (e.g., at 850 deg.C) in an atmosphere having partial O2 pressure of >=20Torr.

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