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1. 发明专利

DE69011187T2 未知
公开(公告)号：DE69011187T2
公开(公告)日：1994-12-01
申请号：DE69011187
申请日：1990-05-09
申请人： MITSUBISHI METAL CORP , HITACHI LTD , INT SUPERCONDUCTIVITY TECH
发明人： SAKURAI TAKESHI , YAMASHITA TORU , YAMAUCHI HISAO , TANAKA SHOJI
IPC分类号： C04B35/00 , C01G1/00 , C01G3/00 , C04B35/45 , H01B13/00 , H01L39/12
摘要： An oxide superconductor comprises a composition represented by the composition formula: (Ndx-Cey-Lz)2CuO4-d (wherein L is an element selected from Ca and Mg, and x + y + z = 1). The compositions of Nd, Ce and L of the oxide superconductor corresponds to a point falling inside an area of Nd-Ce-L ternary diagram surrounded by straight lines (A-B), (B-C), (C-D) and (D-A) connecting point (A) with point (B), point (B) with point (C), point (C) with point (D) and point (D) with point (A), respectively, the points (A), (B), (C) and (D) being points (x = 1, y = 0, z = 0), (x = 0.4, y = 0.6, z = 0), (x = 0.4, y = 0.3, z = 0.3) and (x = 0.1, y = 0, z = 0.9), respectively, in the Nd-Ce-L ternary diagram. Above-described Nd-Ce-L-Cu-O oxides can exhibit superconductivity within a wide range of composition when heat-treated in an atmosphere of nitrogen.

2. 发明专利

DE69011187D1 未知
公开(公告)号：DE69011187D1
公开(公告)日：1994-09-08
申请号：DE69011187
申请日：1990-05-09
申请人： MITSUBISHI METAL CORP , HITACHI LTD , INT SUPERCONDUCTIVITY TECH
发明人： SAKURAI TAKESHI , YAMASHITA TORU , YAMAUCHI HISAO , TANAKA SHOJI
IPC分类号： C04B35/00 , C01G1/00 , C01G3/00 , C04B35/45 , H01B13/00 , H01L39/12
摘要： An oxide superconductor comprises a composition represented by the composition formula: (Ndx-Cey-Lz)2CuO4-d (wherein L is an element selected from Ca and Mg, and x + y + z = 1). The compositions of Nd, Ce and L of the oxide superconductor corresponds to a point falling inside an area of Nd-Ce-L ternary diagram surrounded by straight lines (A-B), (B-C), (C-D) and (D-A) connecting point (A) with point (B), point (B) with point (C), point (C) with point (D) and point (D) with point (A), respectively, the points (A), (B), (C) and (D) being points (x = 1, y = 0, z = 0), (x = 0.4, y = 0.6, z = 0), (x = 0.4, y = 0.3, z = 0.3) and (x = 0.1, y = 0, z = 0.9), respectively, in the Nd-Ce-L ternary diagram. Above-described Nd-Ce-L-Cu-O oxides can exhibit superconductivity within a wide range of composition when heat-treated in an atmosphere of nitrogen.

3. 发明专利

DE69123442D1 未知
公开(公告)号：DE69123442D1
公开(公告)日：1997-01-16
申请号：DE69123442
申请日：1991-09-20
申请人： INT SUPERCONDUCTIVITY TECH , MITSUBISHI MATERIALS CORP , HITACHI LTD
发明人： SAKURAI TAKESHI , YAMASHITA TORU , YAMAUCHI HISAO , TANAKA SHOJI
IPC分类号： C01G3/00 , C01G1/00 , C04B35/00 , C04B35/45 , C04B35/645 , H01B12/00 , H01B13/00 , H01L39/12 , H01L39/24

4. 发明专利

DE69123442T2 未知
公开(公告)号：DE69123442T2
公开(公告)日：1997-04-30
申请号：DE69123442
申请日：1991-09-20
申请人： INT SUPERCONDUCTIVITY TECH , MITSUBISHI MATERIALS CORP , HITACHI LTD
发明人： SAKURAI TAKESHI , YAMASHITA TORU , YAMAUCHI HISAO , TANAKA SHOJI
IPC分类号： C01G3/00 , C01G1/00 , C04B35/00 , C04B35/45 , C04B35/645 , H01B12/00 , H01B13/00 , H01L39/12 , H01L39/24

5. 发明专利

JPH02296722A OXIDE SUPERCONDUCTOR AND ITS MANUFACTURE 失效
公开(公告)号：JPH02296722A
公开(公告)日：1990-12-07
申请号：JP11726289
申请日：1989-05-12
申请人： KOKUSAI CHODENDO SANGYO GIJUTS , TOKYO ELECTRIC POWER CO , HITACHI LTD , MITSUBISHI MATERIALS CORP , TOSHIBA CORP , OKI ELECTRIC IND CO LTD , SUMITOMO ELECTRIC INDUSTRIES , MITSUBISHI ELECTRIC CORP , KANSAI ELECTRIC POWER CO , FURUKAWA ELECTRIC CO LTD , CHUBU ELECTRIC POWER , MATSUSHITA ELECTRIC IND CO LTD
发明人： SAKURAI TAKESHI , YAMASHITA TORU , SAKAI SUKEYUKI , YAMAUCHI HISAO , TANAKA SHOJI , IKEDA HIROSHI , IKEGAWA SUMIO , ITO TAKAO , OKUDA SHIGERU , SUZUKI NOBURO , NISHIKAWA TOKUHIRO , NOZAKI AYUMI , MAEDA TOSHIHIKO , MIYAJIMA MASAMICHI , WADA TAKAHIRO
IPC分类号： C04B35/00 , C01G1/00 , C01G3/00 , C04B35/45 , H01B12/00 , H01L39/12
摘要： PURPOSE:To easily manufacture the oxide superconductor in which a superconducting phase appears over the wide compositional range by subjecting an oxide sintered body contg. each specified molar ratio of Nd, Ce, Ba and Cu to heat treatment in a reducing atmosphere. CONSTITUTION:An oxide sintered body expressed by compositional formula of {Nd1-x(Ce1-yBay)x}2CuO4-d and contg. Nd, Ce, Ba and Cu each in the molar ratio of 2(1-x):2x(1-y):2xy:1 (where 0

6. 发明专利

JPH01184882A HIGH TEMPERATURE SUPERCONDUCTING QUANTUM INTERFERENCE DEVICE 失效
公开(公告)号：JPH01184882A
公开(公告)日：1989-07-24
申请号：JP372188
申请日：1988-01-13
申请人： HITACHI LTD
发明人： TARUYA YOSHINOBU , NAKANE HIDEAKI , YAMASHITA TORU
IPC分类号： H01L39/22
摘要： PURPOSE:To improve the detecting sensitivity of a superconductor quantum interference device, by forming a Josephson junction of crystal defects of T-Ba- Cu oxide crystals while providing such crystal defects at one or two places in series. CONSTITUTION:A thin SrTiO3 film 11 is formed on an SrTiO3 single-crystal substrate 10. The film 11 is etched to provide a line of the SrTiO3 film 11 transversing a region where a Josephson junction is to be provided. A thin film of Y-Ba-Cu oxide 12 is formed thereon. A single-crystal thin film is formed by the sputtering process using sintered Y-Ba-Cu oxide as a target material. In the thin film of Y-Ba-Cu oxide which is polycrystalline, crystal grains are aligned in a row along the line of the SrTiO3 film 11. Accordingly, two rows of grain boundaries of the Y-Ba-Cu oxide thin film are made vertically to the line of the SrTiO3 thin film. In this manner, the width of modulation can be increased.

7. 发明专利

JPH04214062A PRODUCTION OF OXIDE SUPERCONDUCTOR 失效
公开(公告)号：JPH04214062A
公开(公告)日：1992-08-05
申请号：JP1468491
申请日：1991-01-14
申请人： KOKUSAI CHODENDO SANGYO GIJUTS , MITSUBISHI MATERIALS CORP , HITACHI LTD
发明人： SAKURAI TAKESHI , YAMASHITA TORU , YAMAUCHI HISAO , TANAKA SHOJI
IPC分类号： C01G3/00 , C01G1/00 , C04B35/00 , C04B35/45 , C04B35/645 , H01B12/00 , H01B13/00 , H01L39/12 , H01L39/24
摘要： PURPOSE:To set manufacturing conditions, such as temp. and pressure, at values in wide ranges, respectively, and to shorten manufacturing time by subjecting a sintered compact obtained by means of the calcination and sintering of powdery raw materials to hot isostatic pressing in specific conditions at the time of producing an La-Sr-Ca-Cu-O based superconductor. CONSTITUTION:At the time of producing an oxide superconductor having a composition represented by a composition formula La2-xSrxCaCu2O6(0

8. 发明专利

JPH01180477A FLUX METER 失效
公开(公告)号：JPH01180477A
公开(公告)日：1989-07-18
申请号：JP372088
申请日：1988-01-13
申请人： HITACHI LTD
发明人： YAMASHITA TORU , TARUYA YOSHINOBU , KAWABE USHIO
IPC分类号： H01L39/22 , G01R33/035
摘要： PURPOSE:To obtain a flux meter which operates stably at a high temp. and is capable of detecting slight magnetic waves by forming the meter of an inductor made of a thin high-temp. superconducting film, metallic film, insulating film, input coil, etc. CONSTITUTION:An insulating substrate 5 is stepped by a sputtering method, etc. The thin high-temp. superconducting film consisting of a Y-Ba-Cu oxide, etc., is formed by a method such as EB method thereon and the metallic film 2 consisting of Au, etc., is formed thereon by vapor deposition after a heat treatment. After the Josephson junction part of an SQUID inductor 3 and the step part of the substrate 5 are mated, patterning is executed by using a sputtering method, etc., to sputter and form the inter-layer insulating layer film 4. The thin high-temp. superconducting film or the like is further formed on the inter-layer insulating film 4 by a method such as EB method and patterning for the input coil is executed; thereafter, the film is subjected to the heat treatment to form the input coil 1.

9. 发明专利

JPS6489477A SUPERCONDUCTING ELEMENT 失效
公开(公告)号：JPS6489477A
公开(公告)日：1989-04-03
申请号：JP24372987
申请日：1987-09-30
申请人： HITACHI LTD
发明人： YAMASHITA TORU , TARUYA YOSHINOBU , KAWABE USHIO
IPC分类号： H01L39/22
摘要： PURPOSE:To miniaturize an element and improve its performance such as switching speed by implanting ions such as H, He, B, C, N, O, Ne, P, S, Ar, and As into the surface of an oxide superconducting thin-film to be provided with an insulating cover, and by making a crystal structure to be amorphous, at the same time oxygen being struck out selectively. CONSTITUTION:A Y-Ba-Cu oxide thin-film 3 is formed on a MgO single crystal substrate 4 by sputtering, and is annealed in an atmosphere of oxygen at 910 deg.C. H ions 1 are implanted into the surface of this thin-film with a gold electrode 2 attached, and an amorphous layer 50nm or over in depth on a superconducting film surface is made an interlayer insulating film 5. Furthermore, the Y-Ba-Cu oxide film 3 is manufactured by the sputtering method, and heat-treated at 910 deg.C. In this case, because the insulating film 5 is thermally stable, it does not produce a diffusion reaction with the oxide high-temperature superconducting film regardless of the heat treatment. Even if ions of such as He, B, C, N, O, Ne, P, S, Ar, and As are implanted into the Y-Ba-Cu oxide thin-film under the same conditions as those of the above H ions, the similar characteristics can be obtained.

10. 发明专利

JPH02296721A OXIDE SUPERCONDUCTOR AND ITS MANUFACTURE 失效
公开(公告)号：JPH02296721A
公开(公告)日：1990-12-07
申请号：JP11726189
申请日：1989-05-12
申请人： MITSUBISHI MATERIALS CORP , HITACHI LTD , KOKUSAI CHODENDO SANGYO GIJUTS
发明人： SAKURAI TAKESHI , YAMASHITA TORU , YAMAUCHI HISAO , TANAKA SHOJI
IPC分类号： C04B35/00 , C01G1/00 , C01G3/00 , C04B35/45 , H01B13/00 , H01L39/12
摘要： PURPOSE:To manufacture the oxide superconductor showing superconducting characteristics over the wide compositional range by subjecting an oxide sintered body having specified compsn. in which a part of Ce in an Nd-Ce-Cu-O series oxide is substituted by the atoms of IIa group elements to heat treatment in a reducing atmosphere. CONSTITUTION:An oxide sintered body expressed by compositional formula of (NdxCeyAe1-x-y)2CuO4-d (where Ae denotes two or more kinds among IIa group elements) and in which the compsn. of Nd, Ce and Ae lies inside of the range surrounded by point A (x=1), point B (x=0 and y=0.6), point C (x=0.4 and y=0.3) and point D (x=0.1 and y=0) is subjected to heat treatment in a reducing atmosphere. In this way, the oxide superconductor in which compositional range showing superconducting characteristics is exceedingly widened can be obtd. in a simplified manufacturing process and reduced working time.

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