BiPbSbSmSrCaCuO高温超导体的制备和结构

PREPARATION AND STRUCTURE OF HIGH TEMPERATURE SUPERCONDUCTOR IN BiPbSbSnSrCaCuO COMPOUNDS

Department of Materials Science and Engineering Central South University of Technology

摘要: 本工作研究了Bi_2-xPb_xSr₂Ca₂Cu₃O₂和Bi_1.6Pb_0.4-x-ySb_xSn_ySr₂Ca₂Cu₃O₂系统样品的超导性质。以较短的烧结时间制得零电阻温度为107K的Bi_1.6Pb_0.4Sr₂Ca₂Cu₃O₂和110K的Bi_1.6Pb_0.35Sb_0.05Sr₂Ca₂Cu₃O₂的高温超导相。Bi系超导体的结构为两相,其中85K相是a=b=5.408Å,c=30.74Å的四方相;而110K相是a=5.408Å,b=5.336Å,c=37.10Å的正交相。

Abstract: The superconductivity of the samples of Bi_2-xPb_xSr₂Ca₂Cu₃O₂ and Bi_1.6Pb_0.4-x-ySb_xSn_ySr₂Ca₂Cu₃O₂ system compounds was studied. The high temperature Superconducting phase of Bi_1.6Pb_0.4Sr₂Ca₂Cu₃O₂ with T_co=107K and of Bi_1.6Pb_0.35Sb_0.05Sr₂Ca₂Cu₃O₂ with T_co=110K has been prepared in a shorter time of sintering. The structure of Bi series superconductors has two phases in which XRD pattern can be indexed by tetragonal lattice with a=b=5.408Å, c=30.74Å for 85K phase and orthorhombic lattice with a=b=5.408Å, b=5.336Å, c=37.10Å for 110K phase.