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1. 发明专利

JPH09214008A MAGNETIC SHIELDING STRUCTURE WITH SUPERCONDUCTOR 失效
公开(公告)号：JPH09214008A
公开(公告)日：1997-08-15
申请号：JP1746996
申请日：1996-02-02
申请人： DOWA MINING CO , SHIMIZU CONSTRUCTION CO LTD
发明人： SHIBUYA SHINICHI , MUKOYAMA SUMIO , ISHIKAWA NOBORU , KAJIWARA AKIRA , MORINO HITOO , YOSHIZAWA HIDEJI , HASEYAMA HIDEETSU , KOJIMA MASAHIRO , SATO MAMORU
IPC分类号： H01L39/00 , H01L39/04 , H05K9/00
摘要： PROBLEM TO BE SOLVED: To ensure miniaturization and light weight, ensuring cooling performance by constructing a structure with a superconductor film coated on one side of a substrate and a flow passage member fixed to the other side, and forming a refrigerant flow passage between the substrate and the flow passage member. SOLUTION: A superconductor panel 10 includes a substrate 11, a superconductor film 12 coated on one surface of the substrate 11, and an uneven or corrugated flow passage member 13 fixed to the other surface of the substrate 11 with welding, and a refrigerant flow passage 14 is formed between the substrate 11 and the flow passage member 13. Hereby, the present system is one where the superconductor film 12 is indirectly cooled by a refrigerant flowing in the refrigerant flow passage 14 so that there is no need of a cooling container as in a conventional direct cooling system, and hence a magnetic shielding structure can be made thinner together with miniaturization and light weight. Further, the uneven or corrugated refrigerant flow passage 13 and the substrate 11 are integrally formed so that rigidity is improved and hence the thickness of a material of part serving as the substrate is reduced to improve cooling efficiency.

2. 发明专利

JP2002338243A METHOD FOR MANUFACTURING OXIDE SUPERCONDUCTOR 失效
公开(公告)号：JP2002338243A
公开(公告)日：2002-11-27
申请号：JP2001144178
申请日：2001-05-15
申请人： DOWA MINING CO , CHUBU ELECTRIC POWER
发明人： HISHINUMA YOSHIMITSU , YOSHIZAWA HIDEJI , KOBAYASHI SHUICHI , NAGAYA SHIGEO
IPC分类号： C01G3/00 , C01G1/00 , H01L39/24
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing an oxide superconductor capable of manufacturing the oxide superconductor which is good in the reproducibility of crystal orientation, is controlled in the solid solution ratio in a phase to a suitable value, exhibits a high critical current density characteristic and has excellent electric characteristics, magnetic characteristics, mechanical strength and environment resistance. SOLUTION: The calcined powder obtained by subjecting a raw material mixture containing an RE compound (RE is a rear earth element containing Y), a Ba compound and a Cu compound to calcination treatment is molded to make a precursor and this precursor is installed within a furnace casing wherein the atmosphere is replaced with an oxygen partial pressure 0 to 0.01%, and the precursor is subjected to the calcination treatment at 800 t 1000 deg.C. The temperature is then lowered down to at least

3. 发明专利

JPH10324970A RAW MATERIAL FOR CVD AND FILM-FORMING METHOD USING THE SAME 失效
公开(公告)号：JPH10324970A
公开(公告)日：1998-12-08
申请号：JP6765898
申请日：1998-03-04
申请人： DOWA MINING CO
发明人： TAZAKI YUZO , SATO MAMORU , YOSHIZAWA HIDEJI
IPC分类号： C07F3/00 , C23C16/18 , C23C16/44 , C23C16/448
摘要： PROBLEM TO BE SOLVED: To obtain a raw material for CVD having a low m.p. by compounding another org. compd. which has the vapor pressure lower than the vapor pressure of a metal org. compound and lowers the m.p. when compounded with this metal org. compound. SOLUTION: The metal org. compound has an org. ligand of a β-diketone system and the metal element is an alkaline earth metal. If the alkaline earth metals is defined as Ma, the metal org. compound is expressed by the general formula Ma(DPM)2 having dipivaloyl methane as the ligand of Ma. The raw material for CVD is prepd. by compounding the org. metal complex of the β-diketone system consisting of (TMOD) chelate or (TMND) chelate of Ma expressed by the general formula Ma(TMOD)2 or Ma(TMND)2 having a 2,2,6,6- tetramethyl-3,5-octainedione or 2,2,6,6-tetramethyl-3,5-nonamdione as the ligand of Ma with the org. metal complex of the β-diketone system consisting of the dipivaloyl methane chelate of Ma.

4. 发明专利

JPH10287423A PRODUCTION OF OXIDE SUPERCONDUCTOR, AND OXIDE SUPERCONDUCTOR 失效
公开(公告)号：JPH10287423A
公开(公告)日：1998-10-27
申请号：JP8706297
申请日：1997-04-04
申请人： DOWA MINING CO , CHUBU ELECTRIC POWER
发明人： KOBAYASHI SHIYUUICHI , HASEYAMA HIDEETSU , YOSHIZAWA HIDEJI , NAGAYA SHIGEO
IPC分类号： C04B35/45 , C01G1/00 , C01G3/00 , C30B29/22 , H01L39/00
摘要： PROBLEM TO BE SOLVED: To obtain an oxide superconductor having a large orientated superconducting crystal high in electrical characteristics and magnetic characteristics, by specifying the oxygen content in a raw material mixture containing rare earth metal compounds, Ba compounds and Cu compounds. SOLUTION: A raw material mixture containing RE compounds (RE is one or more rare earth metals containing Y), Ba and Cu compounds is heated, melted, quenched and solidified to give a raw material mixture having 15-20 wt.% oxygen content. The raw material mixture is ground and baked in a region at a temperature higher than the melting point of the raw material mixture to give an RE-Ba-Cu-O-based oxide superconductor comprising a finely dispersed an RE2 BaCuO5 phase in an REBa2 Cu3 O7-x phase, having >=0.1 T flux density to be caught in a stretch of 30 cm in any zone on the surface and 15-20 wt.% oxygen content. Consequently, an oxide superconductor capable of suppressing occurrence of crack, having a uniform projected magnetic flux density distribution, is obtained.

5. 发明专利

JPH10139438A CALCINED POWDER FOR OXIDE SUPERCONDUCTOR HAVING HIGH CRITICAL CURRENT DENSITY 失效
公开(公告)号：JPH10139438A
公开(公告)日：1998-05-26
申请号：JP30751196
申请日：1996-11-05
申请人： DOWA MINING CO
发明人： MURATA ATSUSHI , SATO MAMORU , YOSHIZAWA HIDEJI
IPC分类号： B02C17/00 , C01G1/00 , C01G3/00 , C01G29/00 , C04B35/00 , H01B12/00 , H01B13/00
摘要： PROBLEM TO BE SOLVED: To obtain calcined powder reduced in impurities, composed of homogeneous fine particles and capable of producing oxide superconductor having high critical current density by wet-grinding a baked product using an organic solvent on a pulverization process in the manufacturing of calcined powder of the baked product, and subsequently removing the organic solvent in a closed atmosphere. SOLUTION: A baked product, prepared by adjusting the amounts of each component in such a manner that the composition becomes substantially same as the objective composition of an oxide superconductor and calcining the resultant mixture, is wet- ground in the presence of an organic solvent, especially a mixed organic solvent obtained by mixing a nonpolar organic solvent and a polar organic solvent, and subsequently the solvent is removed in a closed atmosphere. Concretely, the solvent is removed by vacuum distillation. The examples of the nonpolar organic solvent usable on the process include benzene, n-hexane, cyclohexane, etc., and the examples of the polar solvent include an alcohol such as methanol or ethanol, acetone, methyl ethyl ketone, etc. This method can be applied on all oxide superconductors such as known Bi-, Y-, T1- and Hg-based oxide superconductors.

6. 发明专利

JPH1092234A OXIDE SUPERCONDUCTOR AND ITS MANUFACTURE 失效
公开(公告)号：JPH1092234A
公开(公告)日：1998-04-10
申请号：JP16432497
申请日：1997-06-20
申请人： DOWA MINING CO
发明人： YAMAGUCHI KAZUYA , KOBAYASHI SHIYUUICHI , HASEYAMA HIDEETSU , YOSHIZAWA HIDEJI
IPC分类号： C04B35/45 , C01G1/00 , C01G3/00 , C30B29/22 , H01B12/00 , H01B13/00
摘要： PROBLEM TO BE SOLVED: To provide an oxide super-conductor exhibiting its uniform, high critical current density and a manufacturing method. SOLUTION: In this method, to a raw material mixture containing a RE compound (RE is a rare earth element containing Y), a Ba compound, and a Cu compound, processing including a burning process in a temperature region that is at least higher than fusing point is applied, and a RE-Ba-Cu-O based oxide super-conductor is manufactured. In this case, this method has a process for milling the above raw material mixture and making any one or two of the above materials of 50 to 100 micrometers in average particle size.

7. 发明专利

JPH09227224A OXIDE SUPERCONDUCTOR HAVING HIGH CRITICAL CURRENT DENSITY 失效
公开(公告)号：JPH09227224A
公开(公告)日：1997-09-02
申请号：JP5538696
申请日：1996-02-20
申请人： DOWA MINING CO
发明人： MURATA ATSUSHI , SATO MAMORU , YOSHIZAWA HIDEJI
IPC分类号： C04B35/45 , C01G1/00
摘要： PROBLEM TO BE SOLVED: To attain high critical current density by compacting and sintering calcined powder obtd. by blending components so as to give the objective compsn. and carrying out calcination and pulverization to a specified average particle diameter or below. SOLUTION: Powders of starting materials such as Bi2 O3 , PbO, SrCO3 , CaO and CuO are blended in a prescribed molar ratio and added to a mixed solvent composed of nonpolar and polar org. solvents such as benzene and methanol. They are mixed and dried to form a powdery mixture. This mixture is calcined at about 800 deg.C, wet-pulverized with a mixed solvent, and the solvent is eliminated by vacuum drying to obtain calcined powder having about , sintering, intermediate compressing and sintering to obtain the objective oxide superconductor such as a Bi-contg. oxide superconductor having about >=3,000A/cm critical current density.

8. 发明专利

JPH09111454A CALCIUM SOURCE MATERIAL FOR CVD AND FILM FORMING METHOD USING THE SAME 失效
公开(公告)号：JPH09111454A
公开(公告)日：1997-04-28
申请号：JP29335995
申请日：1995-10-17
申请人： DOWA MINING CO
发明人： TAZAKI YUZO , YOSHIZAWA HIDEJI
IPC分类号： C30B25/02 , B01J19/00 , C07F3/04 , C23C16/18 , C23C16/30 , C23C16/40 , C30B25/00 , C30B29/02 , C30B29/16
摘要： PROBLEM TO BE SOLVED: To form a homogeneous calcium film at a high speed by using 6- ethyl-2,2-dimethyl-3,5-octanedione as a calcium source and an org. calcium complex as a calcium ligand at the time of depositing calcium by a CVD method. SOLUTION: At the time of depositing the calcium (or a calcium-containing material) on a base material by the CVD method, the 6-ethyl-2,2-dimethyl-3,5- octanedione as the calcium source and the org. calcium complex (m.p. 155-160 deg.C) as the calcium ligand are used. This org. calcium complex is heated to a temp. higher than m.p. (about 160-170 deg.C) to evaporate the complex from a liq. phase of the complex, and the complex is subjected to a thermal decomposition on the base material heated and kept at a prescribed temp. (e.g. 400-800 deg.C) to deposit the calcium and to form the film on the base material. In this way, a stable film forming speed is obtained under a constant evaporating speed and the film is formed at a high speed and homogeneously.

9. 发明专利

JPH0885873A PRODUCTION OF THIN FILM USING ORGANOMETALLIC COMPLEX 失效
公开(公告)号：JPH0885873A
公开(公告)日：1996-04-02
申请号：JP24852694
申请日：1994-09-16
申请人： DOWA MINING CO
发明人： YOSHIZAWA HIDEJI , TAZAKI YUZO
IPC分类号： B01J19/00 , C07F15/00 , C23C16/18
摘要： PURPOSE: To easily obtain a uniform metallic thin film having excellent electrical characteristic with good reproducibility at the time of producing the thin film by vapor growth by using a complex of specified Ir and β-diketonic org. compd. as the raw material. CONSTITUTION: A complex of the Ir shown by the formula and a β-diketonic org. compd. is used as the raw material when a thin film is formed by vapor growth. In the formula R and R' are any group among CH3 , CF3 , C2 H5 , C3 H7 , C3 F7 and C(CH3 )3 . For example, when a thin film is produced by hot CVD, 1g of tris-dipivaloylmethanato-Ir is put in a raw material vessel 2 (made of glass and held at a constant temp. of 90 deg.C), then gaseous Ar 4 is introduced into the vessel at 100ml/min, and tris-dipivaloylmethanatoiridium is entrained by the gas and introduced into a thermal decomposition furnace 6. Meanwhile, a silicon substrate 9 placed in the quartz reaction tube 7 of the furnace 6 is heated to 500 deg.C by a heater 8, a pipeline extending from the vessel 2 to the furnace 6 is kept at 120 deg.C by insulation, and the thin film is formed for 30min under such conditions.

10. 发明专利

JPH05308000A 失效
公开(公告)号：JPH05308000A
公开(公告)日：1993-11-19
申请号：JP11135792
申请日：1992-04-30
申请人： DOWA MINING CO
发明人： ISHIKAWA YUICHI , KOJIMA MASAHIRO , YOSHIZAWA HIDEJI
IPC分类号： H05H7/14 , H05H13/04
摘要： PURPOSE:To dispense with electromagnet and controller to thereby downsize a device as well as attain cost reduction by providing superconductor-made path having a hollow part through which charged particles pass, cooling means, particle incident means, vacuum unit and accelerator means. CONSTITUTION:Charged particles 1 incident by a particle incident means 5 to the inside of a path 3 under a superconductive condition made by a cooling means 4 while a hollow part 2 is maintained in a super high vacuum condition by a vacuum unit 6 magnetizes the path 3 while passing through the hollow part 2, and on the particles 1 repulsive force acts from the circumferential wall to control the moving direction. The particles 1 can have a required speed owning to the acceleration by an acceleration means 7 while uses the central axis of the path as the moving trajectory without any electromagnet for control the moving direction of the particles 1 and its controller of high price. A device can be made compact and reduced in cost if such a charged particle accelerator is applied to an SOR device.

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