Superconductor and process for its preparation

Details Superconductor and process for its preparation Superconductor and process for its preparation

H - Electricity

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H01L 39/12 (2006.01) C01B 13/14 (2006.01) C01G 3/02 (2006.01) C04B 35/45 (2006.01) H01L 39/24 (2006.01)

Patent

CA 1341500

A description is given of superconducting substances having a content of Bi, Sr, Ca and Cu, and of processes for their preparation from the metal oxides within a range which is specified by the overall composition Bi a(Sr,Ca)b- Cu6O x, where a = 3 - 24 and b = 3.23 - 24, with an Sr/ Ca atomic ratio of 1:9 - 9:1 and a Bi:(Ca+Sr) atomic ratio of 0.3 - 1.5. The transition temperature is at least 60 K. The principal phase crystallizes in the orthorhombic system. The pure compounds Bi4(Sr,Ca)4Cu2O~ 12 and Bi4(Sr,Ca)6Cu4O~20.

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