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本文报道掺Pb和不掺Pb的Bi-Ca-Sr-Cu-O体系中高温超导电性的变化规律,讨论了体系组成、制备条件、物相与超导电性的关系。在合适的制备条件下,Bi-Pb-Ca-Sr-Cu-O体系中所形成的T_(ce)为103K的物相,除个别衍射峰外,几乎与纯铋系的4334相完全一致。
The variation of high temperature superconductivity in Pb-doped and Pb-free Bi-Ca-Sr-Cu-O systems is reported in this paper. The relationship between the composition, preparation conditions, phases and superconductivity is discussed. Under proper preparation conditions, the phase of T_ (ce) formed in the Bi-Pb-Ca-Sr-Cu-O system is almost identical to that of the pure bismuth-based 4334, except for some diffraction peaks.