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1. 发明专利

JPH08106823A MANUFACTURE OF OXIDE SUPERCONDUCTIVE WIRE MATERIAL 失效
公开(公告)号：JPH08106823A
公开(公告)日：1996-04-23
申请号：JP24102194
申请日：1994-10-05
申请人： HITACHI LTD
发明人： DOI TOSHIYA , HIGASHIYAMA KAZUHISA , NAGAMURA MITSUZO
IPC分类号： C01G1/00 , C01G29/00 , H01B12/04 , H01B13/00 , H01F6/06
摘要： PURPOSE: To form a superconductivity applied device of superior performances by having all the triaxiality of crystal orientation of a supercooductive material so as to provided with extremely high superconductive critical current density. CONSTITUTION: Powder of Bi2 O3 , SrO, CaO, and CuO of purity 99% or more are mixed so as to have an atomic rate of Bi:Sr:Cu=2:2:1:2. This mixture is put in an aluminum crucible and calcinated in an air flow of, for example, 20% of oxygen and 80% of nitrogen under 800 deg.C for 24 hours. This is pulverized again in a glove in which 100% of nitrogen gas is flown and the POWDER is filled in a silver pipe of 99.99% purity. This is wire-drawn, for example, to an outer diameter of 1.5mm by a drawing bench under being kept at 160 deg.C, for example, and after that, is rolled into, for example, the thickness of 0.07mm under being kept at 160 deg.C. This is cut into 3cm and heat treated in an air flow of 20% of oxygen and 80% of nitrogen. The superconductive material are thus provided with all the triaxiality of crystal orientation so that extremely high superconductive critical current density can be obtained. This is set to superconductive wire material BSCC 1 and silver 2.

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