Armstrong, Westerman, Hattori, McLeland & Naughton
Single crystalline fibrous superconductive composition and process for preparing the same
 There is disclosed a single crystalline fibrous superconductive composition represented by the atomic compositional formula: Bi.sub.2 Sr.sub.2 CaCu.sub.2 M.sub.X O.sub.Y wherein 0<X<0.5; 7.8<Y<8.5; and M is at least one member selected from the group consisting of Pb, Sn, Sb, In, Cd, Ga, Ge, K, Li, and Na. This composition is prepared by a process comprising the step of mixing source material with one another to prepare a mixture having an atomic compositional ratio: Bi=1.00, Sr=0.5.about.2.0, Ca=0.5.about.5.0, Cu=1.0.about.7.0, and M=0.1.about.1.0, wherein M is at least one member selected from the group consisting of Pb, Sn, Sb, In, Cd, Ga, Ge, K, Li, and Na, the step of melting the mixture to prepare a molten material having an atomic compositional ratio: Bi=1.00, Sr=0.5.about.2.0, Ca=0.5.about.5.0, Cu=1.0.about.7.0, M=0.1.about.1.0, and O=3.5.about.8.8, the step of quenching the molten material to prepare a solid material, and the step of heat-treating the solid material in a stream of a gas containing oxygen. 
Agency of Industrial Science & Technology
C C Y C C Y C Y
C30B C30B Y10S C30B C30B Y10S C30B Y10S
inventional inventional additional inventional inventional additional inventional additional
Makoto Toru Hiroshi Hideo Ichiro
Kinoshita Ogura Yamashita Tanigawa Matsubara