C_uO对Bi(Pb)—Sr—Ca—Cu—O系微晶玻璃超导性能的影响

Effects of CuO on the Superconducting Properties of the Glass Ceramies in Bi(Pb)-Sr-Ca-Cu-O System

用DTA、XRD、SEM等手段研究了Bi_(0.7)Pb_(0.3)SrCaCu_xO_y(x=1.6,1.8,2.O,2,2.2.4)系统的晶化过程、晶相组成和晶体形貌,详细讨论了CuO对该系统高超导相2212、2223形成以及对超导性能的影响。研究结果表明:CuO含量的增加有利于超导相的形成,在CuO=2.0mol附近该系统超导性能呈现最佳值。

The processes of cryarallization. the compositions of the crystal phased and morphologies of the crystals of the glass cramics in Bi0.7Pb0.3SrCaCuxOy.(x= 1. 6,1. 8,2. 0,2. 2,2. 4)system is studied with DTA,XRD,SEM methods. The cffects of CuO is disctissed on the formation of high-Tc superconducting phases (2212,2223)and on the superconducting properties in this system. The re suits observed reveal that incrysing CuO contents is in favour of the formation of superconducting phases, and the optimum CuOconterits should be about 2.2 mol.