| 摘要 |
There is disclosed a single crystalline fibrous superconductive composition represented by the atomic compositional formula: Bi2Sr2CaCu2MXOY 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 DIFFERENCE 2.0, Ca=0.5 DIFFERENCE 5.0, Cu=1.0 DIFFERENCE 7.0, and M=0.1 DIFFERENCE 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 DIFFERENCE 2.0, Ca=0.5 DIFFERENCE 5.0, Cu=1.0 DIFFERENCE 7.0, M=0.1 DIFFERENCE 1.0, and O=3.5 DIFFERENCE 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.
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| 申请人 |
AGENCY OF INDUSTRIAL SCIENCE & TECHNOLOGY |
发明人 |
MATSUBARA, ICHIRO;TANIGAWA, HIDEO;OGURA, TORU;YAMASHITA, HIROSHI;KINOSHITA, MAKOTO |
