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81. 发明专利

JPH05201729A PRODUCTION OF YTTRIUM SUPERCONDUCTOR 失效
公开(公告)号：JPH05201729A
公开(公告)日：1993-08-10
申请号：JP23126892
申请日：1992-07-15
申请人： SANSEI ELECTRIC CORP
发明人： RI INKOU , IN SEKIRETSU , SO TOSHINORI
IPC分类号： C01G1/00 , C01G3/00 , C04B35/45 , C04B35/653 , C22C1/10 , C30B29/22 , H01L39/24

82. 发明专利

JPH05170553A PRODUCTION OF LARGE-SIZED OXIDE SUPERCONDUCTOR 失效
公开(公告)号：JPH05170553A
公开(公告)日：1993-07-09
申请号：JP33719391
申请日：1991-12-19
申请人： KOKUSAI CHODENDO SANGYO GIJUTS , SHIKOKU ELEC POWER , KAWASAKI HEAVY IND LTD , NIPPON STEEL CORP
发明人： TAKAICHI HIROSHI , KONDO AKIHIRO , MURAKAMI MASAHITO , KOSHIZUKA NAOKI , TANAKA SHOJI
IPC分类号： B28B3/02 , C04B35/653
摘要： PURPOSE:To stably produce a large-sized superconductor having strong magnetic levitation force and free from crack and deformation by press-compacting a powdery raw material prepared by a specific method of a prescribed form using a hydrostatic press and growing a superconducting phase by semi-melting thermal treatment. CONSTITUTION:The uniaxial cylindrical press 11 to be used in the present process is composed of a lower mold 12 and an upper mold 13. The raw material powder S1 is prepared by mixing e.g. Y2O3, BaCO3 and CuO at cationic ratios of 1.8:2.4:3.4, calcining the mixture at 920 deg.C for 12hr, putting the calcined product into a platinum crucible after crushing, heating at 1400 deg.C for 20min, quenching the heat-treated product, crushing the obtained block with a copper hammer and incorporating with a prescribed amount of Ag2O or Pt. The raw material powder S1 is filled in the lower mold 12 and preliminarily compacted by pressing with the upper mold 13. The preformed compact S2 is put into an ice-bag made of rubber, evacuated with a vacuum pump and formed with a hydrostatic press 14 to form a compact S3. The compact is placed on a platinum wire in a semi-melting heat-treatment apparatus 15, maintained at about 1100 deg.C for about 30min and cooled in the furnace by a specific method to obtain the objective oxide superconductor S4.

83. 发明专利

JPH05132318A METHOD FOR PREPARING AGGREGATELY ARRANGED POLYCRYSTALLINE MATERIAL 失效
公开(公告)号：JPH05132318A
公开(公告)日：1993-05-28
申请号：JP19323491
申请日：1991-08-01
申请人： CENTRE NAT RECH SCIENT
发明人： ROBEERU TOURUNIE
IPC分类号： C01G1/00 , C01G3/00 , C04B35/45 , C04B35/653 , C30B11/00 , C30B11/04

84. 发明专利

JPH0517130A PRODUCTION OF ELECTRO-MELTED MAGNESIA 失效
公开(公告)号：JPH0517130A
公开(公告)日：1993-01-26
申请号：JP16314891
申请日：1991-07-03
申请人： NIPPON KOKAN KK
发明人： TAKANO KENZABURO , KOMATSU HIROMASA
IPC分类号： C01F5/02 , C04B35/653 , C30B1/02 , C30B29/16
摘要： PURPOSE:To obtain electro-melted magnesia single crystal having large particle diameter in high yield by specifying the electrode diameter, the diameter of the circle passing through the electrodes and an operation parameter to adjust the operation voltage in the melting of magnesia clinker in an electric furnace having embedded electrodes. CONSTITUTION:Magnesia clinker is melted in an electric furnace having embedded electrodes while keeping the operation parameter alpha defined by formula (1) to 10-40. The optimum operation parameter alpha can be achieved by placing electrodes 2 in such a manner as to contact the melting zones 3 of the electrodes with each other, determining the diameter Dp of the circle passing through the electrodes and setting the operation voltage V to a proper level. The electrodes are inserted to the part near the bottom of the furnace and the electrification of the furnace is started to form a layer of a molten material under the electrodes. The electrodes are gradually pulled upward until the clinker is melted to a prescribed height. The formed electro-melted magnesia is solidified in the furnace and the single crystal parts are separated from the magnesia taken out of the furnace.

85. 发明专利

JPH058210A MANUFACTURE OF ELECTROFORMED BRICK 失效
公开(公告)号：JPH058210A
公开(公告)日：1993-01-19
申请号：JP18583891
申请日：1991-07-01
申请人： TOSHIBA MONOFRAX
发明人： TSUCHIYA SHINJI , HIRATA KIMIO , ENDO SHIGEO , ITO AKIRA , ORIMO YOSHIZO
IPC分类号： B28B1/54 , B28B7/34 , C04B35/14 , C04B35/653 , C04B35/657
摘要： PURPOSE:To obtain a high-quality electroformed brick free from a crack or a pore and reduce a cost of a cast material, by a method wherein casting is performed by making use of a cast molded of quartz glass particles. CONSTITUTION:It is preferable that a grain of quartz glass particles to be used for a cast is regulated to 48-8 meshes and it is preferable that from or phenol organic binder is used for a binder. It is rare that the quartz glass particles are collapsed or cracked even if they are heated suddenly at the time of casting and it is rare that the particles are mixed up with a molten matter by running out through the cast. Then thermal expansion is little to such an extent that it can be ignored substantially, an electroformed brick superior in dimensional accuracy can be manufactured and generation of an edge crack or concave become extremely few. Furthermore, a coefficient of reutilization is high and a procurement cost of the cast material can be reduced.

86. 发明专利

JPH04357131A COMPOUND ELEMENT FOR ELECTRONIC CONNECTION AND METHOD FOR MANUFACTURING SAME 失效
公开(公告)号：JPH04357131A
公开(公告)日：1992-12-10
申请号：JP34547691
申请日：1991-12-26
申请人： ALSTHOM CGE ALCATEL
发明人： KURISUTEIAN BERUE , MISHIERU RIBU
IPC分类号： C01G1/00 , C01G3/00 , C01G29/00 , C03C3/12 , C03C10/00 , C03C10/02 , C03C23/00 , C04B35/45 , C04B35/653 , H01R11/01 , H01R43/00 , H05K3/10 , H05K3/32

87. 发明专利

JPH04321518A METHOD OF MANUFACTURING MOLDING FROM PRECURSOR OF OXIDE HIGH-TEMPERATURE SUPERCONDUCTOR 失效
公开(公告)号：JPH04321518A
公开(公告)日：1992-11-11
申请号：JP20434591
申请日：1991-08-14
申请人： HOECHST AG
发明人： EEBERUHARUTO PURAISURERU , YOAHIMU BOTSUKU
IPC分类号： C01G1/00 , B22D29/00 , C01G29/00 , C04B35/00 , C04B35/45 , C04B35/653 , C25F3/02 , C25F5/00 , H01B12/00 , H01B13/00 , H01L39/24

88. 发明专利

JPH04300242A FUSED ALUMINA-ZIRCONIA-YTTRIA BASED REFRACTORY MATERIAL HAVING EXCELLENT HIGH-TEMPERATURE RESISTANCE AND CORROSION RESISTANCE AND PRODUCTION THEREOF 失效
公开(公告)号：JPH04300242A
公开(公告)日：1992-10-23
申请号：JP322391
申请日：1991-01-16
申请人： JAPAN ABRASIVE
发明人： TAMAMAKI MASAHIRO , ONODA YOSHIHIRO , TSUDA KOJI
IPC分类号： C04B35/101 , C04B35/109 , C04B35/48 , C04B35/653
摘要： PURPOSE:To provide fused alumina-zirconia-yttria based fire proof material having excellent resistance to high-temperature and corrosion resistance and optimum as a sliding nozzle material used in a continuous casting device and producing method thereof. CONSTITUTION:The objective fused alumina-zirconia-yttria based refractory material obtained by adding 10-60wt.% zirconia and 0.05-7wt.% yttria or rare earth mineral containing yttria to alumina and melting and solidifying the mixture. One or two or more kind of compounds among CaO, MgO and TiO2 may be added thereto as a stabilizer for zirconia. The refractory material is preferably produced by adding a zirconia raw material and yttria raw material to an alumina raw material and mixing these components and melting the mixture in arc type electric furnace and then cooling the melt and powdering the resulting ingot and uniforming these particles.

89. 发明专利

JPH04160062A PRODUCTION OF SUPERCONDUCTING MATERIAL 失效
公开(公告)号：JPH04160062A
公开(公告)日：1992-06-03
申请号：JP28406490
申请日：1990-10-22
申请人： SEIKO EPSON CORP
发明人： NATORI EIJI , SHIMODA TATSUYA
IPC分类号： C04B35/653 , C01F11/00 , C01G1/00
摘要： PURPOSE:To increase critical current density and to improve mechanical strength and durability by heating a quenched block obtd. by quenching molten starting materials and by hot working the heated block in a liq.-crystal mixed phase state. CONSTITUTION:Starting materials such as Y2O3, BaCO3 and CuO are mixed, calcined in an oxygen atmosphere, pulverized, melted by heating at 1,350-1,450 deg.C for 3-10min and quenched to obtain a quenched block. This block is heated at 1,050-1,150 deg.C and hot worked in a liq.-crystal mixed phase state at 970-1,000 deg.C.

90. 发明专利

JPH0489361A CASTING AND MOLDING METHOD FOR BI-BASED OXIDE SUPERCONDUCTOR PRECURSOR 失效
公开(公告)号：JPH0489361A
公开(公告)日：1992-03-23
申请号：JP20486490
申请日：1990-07-30
申请人： FURUKAWA ELECTRIC CO LTD
发明人： FURUKAWA KOICHI
IPC分类号： C04B35/653 , H01B12/02 , H01B13/00
摘要： PURPOSE:To efficiently obtain a Bi-based oxide superconductor molded body excellent in superconductive characteristics at a low cost by dividing the melt of a Bi-based oxide superconductor precursor into a plurality of times and pouring it into a casting mold in the case of casting and molding the precursor. CONSTITUTION:Bi2O3, SrCO3, CaCO3 and CuO are mixed so that the atomic ratio of Bi:Sr:Ca:Cu is regulated to 2:2:1:2. This mixture is introduced in a platinum crucible, heated and melted. Then the melt of this obtained Bi-based oxide superconductor precursor is poured into a casting mold for molding. Further a raw material is reintroduced into the vacant platinum crucible and heated. The obtained melt is poured into the casting mold for molding. After this operation is repeatedly performed in the necessary times, the casting mold for molding is cooled. The molded body is taken out and annealing treatment is performed in the oxygen atmosphere. Thereby even in the case of producing a large-sized Bi-based oxide superconductor molded body, a miniature crucible may be repeatedly utilized and the need for using a large-sized platinum crucible is eliminated.

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