发明授权
US5599775A (Hg Cu)Bg.sub.2 Ca.sub.2 Cu.sub.3 Oy oxide superconductor and method of
preparing the same
失效
（Hg Cu）Bg2Ca2Cu3Oy氧化物超导体及其制备方法
- 专利标题： (Hg Cu)Bg.sub.2 Ca.sub.2 Cu.sub.3 Oy oxide superconductor and method of preparing the same
- 专利标题（中）： （Hg Cu）Bg2Ca2Cu3Oy氧化物超导体及其制备方法
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申请号： US591990申请日： 1996-01-26
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公开(公告)号： US5599775A公开(公告)日： 1997-02-04
- 发明人: Makoto Itoh , Ayako Yamamoto , Kazuyuki Isawa , Seiji Adachi , Hisao Yamauchi , Shoji Tanaka
- 申请人： Makoto Itoh , Ayako Yamamoto , Kazuyuki Isawa , Seiji Adachi , Hisao Yamauchi , Shoji Tanaka
- 申请人地址： JPX JPX JPX JPX
- 专利权人： Sumitomo Electric Industries, Ltd.,Tohoku Electric Power Co., Inc.,Matsushita Electric Industrial Co., Ltd.,International Superconductivity Technology Center
- 当前专利权人： Sumitomo Electric Industries, Ltd.,Tohoku Electric Power Co., Inc.,Matsushita Electric Industrial Co., Ltd.,International Superconductivity Technology Center
- 当前专利权人地址： JPX JPX JPX JPX
- 优先权： JPX5-155444 19930625
- 主分类号： C01G1/00
- IPC分类号： C01G1/00 ; C01G13/00 ; C04B35/00 ; C04B35/45 ; H01B12/00 ; H01B13/00 ; H01L39/12 ; H01L39/24
摘要：
Provided is an Hg--Ba--Ca--Cu--O oxide superconductor having a high superconductivity transition temperature Tc and a method which can prepare the same in excellent reproducibility. This oxide superconductor consists essentially of Hg, Ba, Ca, Cu and O, and is expressed in a chemical formula (Hg.sub.1-X Cu.sub.X)Ba.sub.2 Ca.sub.2 Cu.sub.3 O.sub.y, wherein X=0.05 to 0.7 and Y=8 to 8.75. A method of preparing the oxide superconductor comprises a step of mixing raw materials of Hg, Ba, Ca and Cu with each other so that (Hg+Ba):Ca:Cu =b:1:C and Hg:Ba=(1-a):a, wherein 0.625.ltoreq.a.ltoreq.0.714, 1.ltoreq.b.ltoreq.3 and 1.667.ltoreq.c.ltoreq.3.444, in mole ratio, and compression-molding the mixture, and a step of heat treating a compact obtained by the compression molding. This oxide superconductor has a superconductivity transition temperature Tc of 134 K, which is the highest at present.