Ba－K－Bi－O超导体的化学稳定性

Chemical Stability of Ba-K-Bi-O Superconductor

Ｂａ－Ｋ－Ｂｉ－Ｏ超导体的化学稳定性谢民，赵良仲（中国科学院化学研究所北京１０００８０）关键词Ｂａ－Ｋ－Ｂｉ－Ｏ超导体，化学稳定性，聚吡咯，聚噻吩Ｂａ－Ｋ－Ｂｉ－Ｏ（ＢＫＢＯ）超导体的导电性和超导性各向同性，相干长度长，制备温度低，因此它有良好的应用...

The chemical reactivity of Ba-K-Bi-O(BKBO) superconductor with various solutions including water,acid,alkali and organic solvents has been investigated systematically.Results show that BKBO has a strong reaction with HCl acid,a mild reaction with alkali and a very weak reaction with pure water.BKBO almost does not react with organic solvents.Protective layers of polypyrrole(PPy) and polythiophene(PTh) have been prepared electrochemically on BKBO films respectively.Magnetic measurements for PPy/BKBO and PTh/BKBO composites show that the electrochemical process does not degrade the superconductivity of BKBO. Results of wet experiments and magnetic susceptibility measurements show that the PPy layer is able to protect BKBO against acid.