Substituted superconductive bi-sr-ca-cu oxide and...

Details Substituted superconductive bi-sr-ca-cu oxide and... Substituted superconductive bi-sr-ca-cu oxide and...

C - Chemistry, Metallurgy

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F

23/224

C01F 17/00 (2006.01) C01B 13/14 (2006.01) C01G 3/02 (2006.01) C04B 35/45 (2006.01) H01L 39/12 (2006.01)

Patent

CA 1341504

A metal oxide material is provided which is represented by the compositional formula: Bi2(Sr1-x Ca x)3+n Cu2+n O(12+3n)-.delta. wherein 0 < x < 1, 0 < n <= 10, and 0 < .delta.. The metal oxide may be represented by the compositional formula: (Bi1-x A I x)2(Sr y Ca1-y-z A II z)p(Cu1-r A III r)q O.delta. wherein 0 ~ x ~ 0.5 , 0.3 ~ y ~ 0.7 , 0 ~ z ~ 0.5 , 0 ~ r ~ 0.1, 1 > Y+z, 2 ~ p ~ 11, 1 ~ q ~ 10 and 5.4 ~ s .sigma. 24; A I is an element selected from Groups IIIb, IVb and Vb; A II is an element selected from Groups Ia, IIa and IVb; and A III is an element selected from Groups IVa, Va, VIa and VIII. The metal oxide may further comprise an element selected from lanthanoids and yttrium. The metal oxide material shows superconductivity at a temperature not lower than the boiling point of liquid helium.

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