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公开(公告)号:US4990488A
公开(公告)日:1991-02-05
申请号:US275779
申请日:1988-11-23
申请人: Hans-Georg von Schnering , Winfried Becker , Martin Schwarz , Leonhard Walz , Elfi Waldschmidt , Joachim Adam
发明人: Hans-Georg von Schnering , Winfried Becker , Martin Schwarz , Leonhard Walz , Elfi Waldschmidt , Joachim Adam
CPC分类号: H01L39/2419 , C04B35/4521 , H01L39/126 , Y10S505/782
摘要: Black crystal compositions having the empirical composition Bi.sub.a Sr.sub.b Cu.sub.c O.sub.d are described where a+b+c=1, A=0.36-0.557, b=0.098-0.496, c=0.1-0.4 and d=approximately 1+a/2. These compositions have a superconducting transition temperature T.sub.c for superconductivity of greater than 20 K and contain a principal phase which crystallizes in the orthorhombic system. They can be prepared from the mixture of the oxides in the atomic ratio stated by heating to 700.degree.-1000.degree. C.
摘要翻译: 其中a + b + c = 1,A = 0.36-0.557,b = 0.098-0.496,c = 0.1-0.4,d =约1 + a / 2,描述具有经验组成BiaSrbCucOd的黑色晶体组合物。 这些组合物具有大于20K的超导转变温度Tc,并且包含在正交系中结晶的主相。 它们可以通过加热至700°-1000℃的原子比由氧化物的混合物制备。