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41. 发明专利

JPH01321031A MANUFACTURE OF OXIDE SUPERCONDUCTING WIRE 失效
公开(公告)号：JPH01321031A
公开(公告)日：1989-12-27
申请号：JP15448288
申请日：1988-06-22
申请人： FURUKAWA ELECTRIC CO LTD
发明人： KOMATSU WATARU , SEDAKA RYOJI , SHIBATA TOSHIAKI
IPC分类号： B21F19/00 , C01B13/14 , C01G1/00 , C01G3/00 , C01G29/00 , H01B12/04 , H01B13/00
摘要： PURPOSE:To efficiently obtain oxide superconducting wire excellent in quality by dissolving compound containing constitutive elements of oxide superconductor, then, powdering the solution, attaching the powder to linear substrate, heating, sintering and annealing it. CONSTITUTION:A prescribed quantity of the compound containing each of constitutive elements of oxide superconductor is dissolved in solvent and atomized in a supersonic nebulizer 2 to carry the atomized substance 3 to DMA 5, to select and supply the atomized substance 3 into a reactor 6. The atomized substance 3 is heated in the reactor 6, reacts on oxide superconductor powder, is charged by a link pole 7 for generating an electric field and attached onto the silver wire 8 which is sent out of an uncoiler 14 and charged to a dust collecting pole. This silver wire 8 is passed through the die 10 arranged in a preliminary sintering furnace 9 to smoothen the surface 10, to sinter a powder layer in reserve, then, to be heated, sintered and annealed in sequence in a heating/sintering furnace 11 and an annealing furnace 12 and to obtain an oxide superconducting wire and to be taken up on an uncoiler 15.

42. 发明专利

JPH01320259A PRODUCTION OF SUPERCONDUCTING OXIDE MOLDED BODY 失效
公开(公告)号：JPH01320259A
公开(公告)日：1989-12-26
申请号：JP15448388
申请日：1988-06-22
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SHIGA SHOJI , MATSUMOTO KANAME , SEDAKA RYOJI , KOMATSU WATARU
IPC分类号： C04B35/00 , C01G1/00 , C04B35/45 , H01B12/02 , H01B13/00 , H01L39/24
摘要： PURPOSE:To obtain a superconducting molded body having a high degree of crystal orientation and high critical current density by applying a magnetic field to single crystal powder of an oxide superconductor dispersed in a medium to form a caked aggregate of oriented powder and by sintering the caked aggregate. CONSTITUTION:Single crystal powder of an oxide superconductor having

43. 发明专利

JPH01320225A PRODUCTION OF OXIDE SUPERCONDUCTOR 失效
公开(公告)号：JPH01320225A
公开(公告)日：1989-12-26
申请号：JP15149188
申请日：1988-06-20
申请人： FURUKAWA ELECTRIC CO LTD
发明人： KOMATSU WATARU , SEDAKA RYOJI , SHIBATA TOSHIAKI
IPC分类号： C01G29/00 , C01G1/00 , H01B12/00 , H01B13/00 , H01L39/24
摘要： PURPOSE:To obtain the title fine and spherical oxide superconductor powder by atomizing and heating, etc., a mixture of aq. solns. of lactates of metallic elements as starting materials in a desired proportion in a production of an oxide superconductor consisting of a rare earth element or Bi, an alkaline earth metal, Cu, and O. CONSTITUTION:A homogeneous mixture of aq. soln. of lactates of elements for starting materials of an oxide superconductor consisting of a rare earth element or Bi, an alkaline earth metal, Cu and O in a desired proportion, is prepd. The mixture is atomized and then classified to desired particle sizes. The classified liquid particles are transformed to oxide powder by heating at 500-1,100 deg.C in O2-contg. atmosphere. Water contained therein is recovered in a vessel cooled by a coolant, and the product is classified simultaneously. Obtd. dry powder of the oxide superconductor is collected by applying a load while executing stirring of the powder.

44. 发明专利

JPH01239026A PRODUCTION OF OXIDE SUPERCONDUCTING FORM 失效
公开(公告)号：JPH01239026A
公开(公告)日：1989-09-25
申请号：JP6523188
申请日：1988-03-18
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SHIBATA TOSHIAKI , MINAMI TSUTOMU , TOGE NOBORU , TATSUMISUNA MASAHIRO , SEDAKA RYOJI , KOMATSU WATARU
IPC分类号： H01L39/24 , C01G1/00 , C01G29/00 , H01B12/02 , H01B13/00
摘要： PURPOSE:To obtain the title high-density form of high critical current density, by covering a specific composite oxide melt around a core to make a shaping followed by cooling and then heat treatment. CONSTITUTION:Firstly, a Bi-alkali metal-Cu-O-based composite oxide with the composition range capable of obtaining vitreous phase [e.g., Bi(Sr,Ca)xCuyOz (x is 1-4; y is 1-4; z is 1-10); Ca/(Sr+Ca)=0.2-3] is heated to 900-1,300 deg.C in an electric furnace 10 and melted to produce a composite oxide melt 12. Second, this melt 12 is covered around a core 9 followed by feeding a cooling glass 14 to quench the covered core at a rate of >=100 deg.C/sec to obtain a composite wire 13 with oxide melt layer converted into amorphous phase. Thence, this composite wire 13 is heat treated at 390-890 deg.C, thus obtaining the objective superconducting form.

45. 发明专利

JPH01188416A PRODUCTION OF OXIDE SUPERCONDUCTING POWDER 失效
公开(公告)号：JPH01188416A
公开(公告)日：1989-07-27
申请号：JP939788
申请日：1988-01-19
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SEDAKA RYOJI , KOMATSU WATARU , SHIBATA TOSHIAKI
IPC分类号： H01L39/24 , C01G1/00 , C01G3/00 , C04B35/00 , C04B35/45 , H01B12/00 , H01B13/00
摘要： PURPOSE:To obtain the subject dense and fine powder having superior superconducting characteristics by atomizing a soln. mixture consisting of each constituting starting material in a predetermined compositional ratio for an aimed material, in the atmosphere of plasma, oxidizing it in O2-contg. plasma after evaporating and drying the atomized product, and collecting after charging electrically the oxidized product. CONSTITUTION:A particle size distribution of fine and uniform atomized particles obtd. by atomizing with an atomizing device 5 a starting material 4 consisting of a uniform soln. mixture prepd. by mixing each starting material for constituting an aimed material, such as an alkaline earth metal, a rare earth element, and Cu, etc., in a predetermined compositional ratio and dissolving the mixture in a solvent, is adjusted with a particle classifier 3 using carrier gas controlled to a specified flow rate with a flow rate controller 6A, then the product is fed to a DC plasma torch 2, On one hand, plasma gas, sealing gas, and protecting gas are fed to said torch 2. After evaporating the solvent, etc., quickly with the DC plasma 7, the evaporated product is introduced into microwave plasma 9 generated by an oscillator 16 through a microwave oscillator 18 and a waveguide system 17, and oxidized in O2-contg. plasma atmosphere. Obtd. powder of the oxide superconductor is then charged electrically with DMA 12 and collected in an electric collector 13.

46. 发明专利

JPH01176221A PRODUCTION OF OXIDE SUPERCONDUCTING POWDER 失效
公开(公告)号：JPH01176221A
公开(公告)日：1989-07-12
申请号：JP33598087
申请日：1987-12-29
申请人： FURUKAWA ELECTRIC CO LTD
发明人： KOMATSU WATARU , SEDAKA RYOJI , SHIBATA TOSHIAKI
IPC分类号： H01L39/24 , C01G1/00 , C01G3/00 , H01B12/00 , H01B13/00
摘要： PURPOSE:To obtain the title fine and spherical powder, by atomizing a raw material mixed solution constituting superconducting powder of oxide, heating in an oxygen atmosphere to give oxide powder and freeze-drying. CONSTITUTION:Each raw material constituting superconducting powder of oxide consisting of nitrates of Y, Ba, Cu, etc., is dissolved in a solvent to give solutions, which are blended in a desired composition to give a uniform solution 2. Then the solution is fed to an atomizer 3, atomized by an ultrasonic vibrator at 0.7-3MHz frequency, particles 4 of the atomized raw material solution are sent to a particle classifier 5 by an oxygen gas fed from a flow rate controller 1 and classified to give an atomized raw material 6 having several mum particle diameter. Then the raw material 6 is sent to a furnace 7 regulated at 700-1,100 deg.C by a sensor 8 and heated to give superconducting powder 9 of oxide base. Then the powder 9 is fed to a freezing and collecting container 10 cooled by a refrigerant, the powder 9 and the solvent are frozen and the solvent is removed by vacuum drying.

47. 发明专利

JPS6033227A PREPARATION OF MULTIFIBER 失效
公开(公告)号：JPS6033227A
公开(公告)日：1985-02-20
申请号：JP13876483
申请日：1983-07-29
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SATOU TSUGIO , SHIBUYA SEIJI , KOMATSU WATARU
IPC分类号： C03B37/028 , G02B6/00 , G02B6/04 , G02B6/06
摘要： PURPOSE:To form multifiber having similar figure to a base material without causing deformation of a core by arranging plural linear glass bodys properly and assembling to form a base material, and drawing the base material with a specified tension while melting the base material by heating. CONSTITUTION:This invention relates to multifiber for image fiber to be used in transmission of picture image wherein the base material 2 is formed by arranging plural linear glass bodys 1 properly and assembling the arranged linear glass bodys. The base material 2 is melted by heating at a specified temp., and drawing is performed b controlling the tension within 30-80g range. By this process, multifiber contg. no void space 3 is formed without deforming the core 4.

48. 发明专利

JPS5992928A PREPARATION OF PARENT MATERIAL OF OPTICAL FIBER OF CONSTANT POLARIZATION 失效
公开(公告)号：JPS5992928A
公开(公告)日：1984-05-29
申请号：JP20019482
申请日：1982-11-15
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SHIBUYA SEIJI , SATOU TSUGIO , KOMATSU WATARU
IPC分类号： C03B20/00 , C03B37/012 , G02B6/024
摘要： PURPOSE:To obtain a parent material of optical fiber of constant polarization having improved characteritics, by packing glass having a coefficient of linear expansion different from those of a core part and a clad part into a sequare sectional empty hole set in the longer direction of the clad part, so that stress is concentrated in the core. CONSTITUTION:A preform consisting of the core part 1 and the clad part 2 is prepared, a pair of V channels are formed in the longer direction of a quartz tube, the bottom part of each V channel is reached to the inner face of the quartz tube, so that the quartz tube is divided into two, to give a pair of the glass pieces 3 and 3, and clad part 3' consisting of a pair of the glass pieces 3 and 3 and the clad part 4' made of the quartz tube 4 are prepared. The preform is inserted into the quartz tube 4, and a pair of the glass pieces are inserted into the gap between the quartz tube 4 and the preform. One side of the quartz tube 4 is fused, so that the empty holes 5 and 5 are collapsed, the quartz tube is stood vertically with the side put down, and dope quartz doped with 20mol% boron is inserted into the empty holes 5 and 5. The quartz tube 4 is heated uniformly by oxyhydrogen flame from the bottom, and the dope quartz is melted.

49. 发明专利

JPS58125628A PREPARATION OF OPTICAL FIBER PREFORM 失效
公开(公告)号：JPS58125628A
公开(公告)日：1983-07-26
申请号：JP696782
申请日：1982-01-20
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SHIBUYA SEIJI , SATOU TSUGIO , KOMATSU WATARU , TAGUCHI EIICHI , IIDA YOSHITAKA
IPC分类号： C03B37/018 , C03B37/014 , G02B6/00
摘要： PURPOSE:To obtain an optical fiber preform containing a large amount of OH groups and having excellent radiation resistance, by converting the glass soot to clear glass in an atmosphere containing steam. CONSTITUTION:Although the voids of the soot 1 contain water, it is necessary to put additional water in the void for the preparation of an optical fiber preform containing a large amount of OH groups. In order to satisfy the above requirement, the partial pressure of water in the He gas atmosphere in a heating furnace 2 is increased, and the soot 1 is converted to clear optical fiber preform by heating in the above furnace 2. This can be achieved by introducing He gas containing steam through the gas inlet 4 at the bottom of the core tube 3 of the furnace. The water-content of the void of the soot 1 is increased by the process, and the water is diffused into the glass by the high temperature treatment in the furnace 2 and enters into the network structure of the glass in the form of OH group. The conversion to clear glass can be carried out also by using pure steam in place of He as the atmosphere in the furnace 2.

50. 发明专利

JPS5826047A MANUFACTURE OF METAL COATED OPTICAL FIBER 失效
公开(公告)号：JPS5826047A
公开(公告)日：1983-02-16
申请号：JP12499581
申请日：1981-08-10
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SATOU TSUGIO , SHIBUYA SEIJI , KOMATSU WATARU
IPC分类号： C03C25/42 , C03B37/10 , G02B6/44
摘要： PURPOSE:To eliminate obstruction due to an excess decomposition product and to enable long-time operation by passing an optical fiber through a flame contg. a decomposed metallic compound. CONSTITUTION:A metallic compound as a starting material is fed from a feeding vessel 18 to the flame 19' of a burner 19 and subjected to thermal decomposition or flame hydrolysis. An optical fiber 13a is passed through the flame 19' to form a thin metallic coating on the surface. The primary metal coated optical fiber 13b is passed through a curcible 3 holding a molten metal form a metallic coating. Thus, a secondary metal coated optical fiber 13 is obtd.

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