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1. 发明专利

JPH03171516A MANUFACTURE OF COMPOUND SUPERCONDUCTING WIRE 失效
公开(公告)号：JPH03171516A
公开(公告)日：1991-07-25
申请号：JP30900089
申请日：1989-11-30
申请人： NAT RES INST METALS , TOSHIBA CORP
发明人： INOUE TADASHI , TAKEUCHI TAKAO , ITO KIKUO , YAMAMOTO KAZUO , MURASE AKIRA
IPC分类号： B21F19/00 , C22F1/00 , C25D7/06 , H01B12/10 , H01B13/00
摘要： PURPOSE:To increase the Sn concentration of an alloy matrix and improve critical current density by applying Sn plating having specific thickness to an inside stabilization bronze wire having specific Sn concentration, and moreover making heat treatment under a given condition. CONSTITUTION:In an inside stabilization bronze wire, the followings are formed: a Cu stabilization material 1 at the center, a Ta diffusion barrier 2 buried in the periphery of the Cu stabilization material 1, and moreover a Cu-Sn alloy matrix 3 having a containing Sn concentration of 5-15wt.%, in which a filament 4 composed of Nb-Ta alloy is buried in the periphery of the barrier 2. Sn plating 5 having a thickness of 0.1--5% of a wire material outer diameter is applied to the wire material surface. Next the diffusion heat treatment of Sn is made to increase the mean Sn concentration of the matrix 3 to the solution limit of an alpha alloy phase of 8-35wt.%. Moreover the critical current density of a bronze superconductive wire can be improved by making Nb-Sn production heat treatment at a given temperature rising rate.

2. 发明专利

JPH09161573A MANUFACTURE OF SUPERCONDUCTING WIRE, SUPERCONDUCTING WIRE AND SUPERCONDUCTING MAGNET 失效
公开(公告)号：JPH09161573A
公开(公告)日：1997-06-20
申请号：JP32152795
申请日：1995-12-11
申请人： TOSHIBA CORP
发明人： YAMAMOTO KAZUO , YAMADA MINORU
IPC分类号： B21F19/00 , C04B35/45 , H01B12/04 , H01B13/00 , H01F6/00
摘要： PROBLEM TO BE SOLVED: To heighten the tensile strength of a superconducting wire and suppress drop of the Ic value through chemical reaction of the superconductor with a conductive metal and a plating material. SOLUTION: A superconductor is covered (1) with a conductive material, and the conductive metal is drawn off (2) and processed into a superconducting wire through a rolling process (3). The surface of the obtained superconducting wire is subjected to a plating process (4), followed by a diffusive heat treatment stage (5) where the conductive metal is left for reaction with the plating material to generate an alloy of them, and then another heat treatment stage (6) where a superconducting layer is formed in the superconducting wire, whereby it is possible to yield a superconducting wire having as high a tensile strength as over 200 [MPa] without causing decrease in the critical current density.

3. 发明专利

JPH0982516A OXIDE SUPERCONDUCTING CURRENT LEAD 失效
公开(公告)号：JPH0982516A
公开(公告)日：1997-03-28
申请号：JP23386695
申请日：1995-09-12
申请人： TOSHIBA CORP
发明人： YAMAMOTO KAZUO
IPC分类号： H01R4/68 , H01B12/16 , H01F6/00 , H01F6/06
摘要： PROBLEM TO BE SOLVED: To provide current leads of an oxide superconductor whose mechanical strengths to the bendings caused by external forces are improved. SOLUTION: Oxide superconducting current leads comprising a low- temperature side electrode 5c which is disposed on one surface orthogonal to the axial direction of an oxide superconductor 5a and is disposed in the place nearly opposed to the center of gravity of the oxide superconductor 5a, and at least one high-temperature side electrode 5b disposed in the peripheral edge of the oxide superconductor 5a.

4. 发明专利

JPH07283023A SUPERCONDUCTING OXIDE CURRENT LEAD 失效
公开(公告)号：JPH07283023A
公开(公告)日：1995-10-27
申请号：JP6713494
申请日：1994-04-05
申请人： TOSHIBA CORP
发明人： YAMAMOTO KAZUO , YAMADA MINORU , NOMURA SHIYUNJI , SAKUGI TAMAKI , KURIYAMA TORU , NAKAGOME HIDEKI , URATA MASAMI , ARAOKA KATSUMASA , KADOMA SHIGEKI
IPC分类号： H01F6/06 , H01B12/00
摘要： PURPOSE:To provide a superconducting oxide current lead which can exhibit highly reliable current conducting function constantly by enhancing the mechanical characteristics thereby preventing rupture, crack or deterioration of superconductivity due to strain or stress at the time of cooling. CONSTITUTION:The superconducting oxide current lead comprises an oxide superconductor lead body 8, a flexible conductor lead part 9 connected in series with the lead body 8 at least on one end side thereof, and a protective pipe 10 applied over the lead body 8 and the lead part 9 while being spaced apart therefrom in order to protect the peripheral surface thereof. In other words, strain caused by the difference of thermal expansion/shrinkage between the lead body 8 and the protective pipe 10 is absorbed by connecting the superconducting or normal conducting flexible lead part 9 in series with the oxide superconductor lead body 8 for conducting current passed through the protective pipe 10 at least on one end side thereof.

5. 发明专利

JPH07193994A CURRENT LEAD AND CURRENT LIMITER EMPLOYING IT 失效
公开(公告)号：JPH07193994A
公开(公告)日：1995-07-28
申请号：JP34718393
申请日：1993-12-27
申请人： TOKYO ELECTRIC POWER CO , TOSHIBA CORP
发明人： HARA CHIKUSHI , NAKADE MASAHIKO , HONJO SHOICHI , KURIYAMA TORU , NAKAGOME HIDEKI , YAZAWA TAKASHI , TAZAKI KENJI , MAEDA HIDEAKI , YAMAMOTO KAZUO , ARAOKA KATSUMASA
IPC分类号： H02H9/02
摘要： PURPOSE:To provide a current lead for suppressing the intrusion of heat effectively and a current limiter employing it. CONSTITUTION:Superconducting current limiting elements 7a, 7b, 7c are set in an inner tank 2 so that they are cooled by liquid helium H. Bushings 9, 11 penetrate the wall of the inner tank 2 and the wall of an outer tank 3. A current path for connecting the superconducting current limiting element in series with the electric circuit is established through the bushings 9, 11 and a current lead 12 having a turnup part 15 between the bushings 9, 11 is provided with an oxide superconductor 13 being employed between the turnup part 15 and the bushing 9 while a copper material being employed between the turnup part 15 and the bushing 11. A refrigerator 16 cools the turnup part 15 of each current lead 12 at a temperature determined by the critical temperature of the oxide superconductor 13.

6. 发明专利

JPH05235423A 失效
公开(公告)号：JPH05235423A
公开(公告)日：1993-09-10
申请号：JP3495492
申请日：1992-02-21
申请人： TOSHIBA CORP
发明人： YAMADA MINORU , YAMAMOTO KAZUO , SATO MASAKO
IPC分类号： H01H33/00 , H01H50/00 , H01L39/20
摘要： PURPOSE:To form.realize an economic permanent current mode easily handled technically and economically by insulating a metal having a high resistance to perform a function as a heat source and integrally incorporating it in an oxide superconductor. CONSTITUTION:Powders of Bi2O3, PBO, SrCO3 and CuO are mixed at a molar ratio of 0.9:0.3:2:3. The mixture is heat treated at 800 deg.C for 24 hours, and then pulverized by a ball mill. Then, powder obtained by the pulverization of the mill is molded in a pellet by a press, again heat treated at 800 deg.C for 24 hours, then pulverized by a ball mill, and temporarily baked powder is obtained. This baked powder is filled in a press die for obtaining a molded form having a depth of 1cm, a length of 3cm and a width of 1cm. On the other hand, a high resistance metal obtained by winding an NiCr wire provided with an Al2O3 layer on its outer periphery in a coil state is extended at its end longitudinally substantially in the center to be disposed, and press molded. Then, it is heat treated at 850 deg.C for 100hours to obtain an oxide superconducting permanent current switch 5.

7. 发明专利

JPH0447611A MANUFACTURE OF OXIDE SUPERCONDUCTING WIRE 失效
公开(公告)号：JPH0447611A
公开(公告)日：1992-02-17
申请号：JP15342790
申请日：1990-06-12
申请人： TOSHIBA CORP
发明人： YAMAMOTO KAZUO , MURASE AKIRA
IPC分类号： C04B35/00 , C01G1/00 , C04B35/45 , H01B12/04 , H01B13/00
摘要： PURPOSE:To give an equal formation phase with oxide superconductors in powder and bulky body or the like to an oxide superconducting wire by setting treating temperature in a heat treatment process lower by 5 deg.C to 25 deg.C than the temperature at which an aimed abundance fraction of superconductive phase becomes maximum in a phase diagram of an element series composing the oxide superconductor. CONSTITUTION:A raw material powder containing constitutional elements of an oxide superconductor in an specific ratio is filled into a metallic sheathing tube and heat- treated in an atmosphere within the range of 15% to 30% of oxygen partial pressure. For wire of an oxide superconductor of Bi series or Pb added Bi series, a preferable heat treatment condition is within the range of 835 deg.C to 850 deg.C in temperature. In accordance with a phase diagram, the heat treatment condition to maximize an abundance fraction of a high Tc phase (2223 phase) of the Bi series oxide superconductor is in the temperature range of 850 deg.C to 860 deg.C in the atmosphere, the optimum temperature of the heat treatment for the wire having the metallic sheathing tube, however, is in the range lower by 10 to 15 deg.C than the above temperature range. The heat treatment in the atmosphere of oxygen partial pressure of 15 to 30% is preferable, but it is easily performed in the atmosphere in general because of no need of an atmosphere adjustment.

8. 发明专利

JPH03285805A PRODUCTION OF OXIDE SUPERCONDUCTOR 失效
公开(公告)号：JPH03285805A
公开(公告)日：1991-12-17
申请号：JP8320790
申请日：1990-03-30
申请人： TOSHIBA CORP
发明人： YAMAMOTO KAZUO , MURASE AKIRA
IPC分类号： C04B35/00 , C01B13/14 , C01G1/00 , C01G29/00 , C04B35/45 , H01B12/00 , H01B13/00
摘要： PURPOSE:To obtain an oxide superconductor improving the critical current density by melting at least a part of the superconductor and unidirectionally solidifying the molten part in a specified manner. CONSTITUTION:At least a part of an oxide superconductor or a material contg. its constutuent elements is melted, and the molten part is unidirectionally drawn out from the high-temp. region to the low-temp. region in the region having a temp. gradient and unidirectionally solidified, and the desired oxide superconductor is obtained. In this process, the molten oxide superconductor is unidirectionally drawn out in the temp. gradient and solidified, hence the crystal grain is oriented in the drawing direction and deposited, and a bulk or wire with the crystal grain is oriented is obtained. The crystal grain of the obtained oxide superconductor bulk or wire is oriented, grain boundaries are reduced, the crystal grains are firmly combined, and consequently the superconductor has a high critical current density and exhibits a high critical current density especially in a magnetic field.

9. 发明专利

JPH01203848A AIR CONDITIONER 失效
公开(公告)号：JPH01203848A
公开(公告)日：1989-08-16
申请号：JP2757488
申请日：1988-02-10
申请人： TOSHIBA CORP
发明人： YAMAMOTO KAZUO
IPC分类号： F04B41/06 , F25B1/00
摘要： PURPOSE:To maintain an optimum oil level in respective compressors by parallelly connecting a plurality of compressors and incorporating a temperature sensing thermocouple in a pipe connecting between the bottoms of the respective compressors so that when the oil temperature sensing thermocouple detected a temperature change in excess of a predetermined range during the oil level equalizing operation, such operation may be continued. CONSTITUTION:Two compressors 13a, 13b set in an outdoor unit 10 are mutually connected between their lower parts through an oil equalizing pipe 28 which acts as a communicating pipe. A temperature sensing thermocouple 29 is attached to the surface of the oil equalizing pipe 28 to detect the oil temperature in the oil equalizing pipe 28, and the detected signal is sent to a controller 26 which comprises an oil level control device 30. If the oil temperature change goes beyond an allowable range, the oil equalizing operation is continued by the controller 26. The oil level equalizing operation is performed such that the operating frequency of one of the compressors, 13a for instance, is raised and that of the other compressor 13b is reduced, and, after a certain time interval has passed after the start of the oil level equalizing operation, the oil temperature change is measured at the oil equalizing pipe with the oil temperature sensing thermocouple 29.

10. 发明专利

JPH01193088A AIR CONDITIONER 失效
公开(公告)号：JPH01193088A
公开(公告)日：1989-08-03
申请号：JP1892988
申请日：1988-01-29
申请人： TOSHIBA CORP
发明人： SHIMIZU KEIICHIRO , KITAMOTO MANABU , YAMAMOTO KAZUO , GOTO YUKIFUMI
IPC分类号： F04B49/06 , F25B1/00 , F25B13/00
摘要： PURPOSE:To avoiding vibration and noise occurring in a compressor by providing an oil equalizing pipe between respective compressors and an oil equalizing means for alternately increase/decrease operational frequency in respective compressors. CONSTITUTION:Respective cases of respective compressors 1, 2 are intercommunicated to each other by an oil equalizing pipe 45. A branch unit B connects flow rate regulating valves 11, 21, 31 to opening/closing valves 15, 25, 35 respectively. Operational frequencies in the compressors 1, 2 are alternately increased/ decreased while holding compliance of total capacities of respective compressors 1, 2 to total required capacities of respective inside units C, D, E. Thus, it is possible to avoid vibration and noise of the compressor and ensure sufficient strength of the oil equalizing pipe.

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