中华医学超声杂志

应用化学 ›› 1996, Vol. 0 ›› Issue (6): 49-51.

• 研究简报 • 上一篇    下一篇

Ba－K－Bi－O超导体的化学稳定性

谢民, 赵良仲   

  1. 中国科学院化学研究所 北京 100080
  • 收稿日期:1996-03-31 修回日期:1996-07-01 出版日期:1996-12-10 发布日期:1996-12-10
  • 基金资助:
    国家自然科学基金;国家超导实验室资助

Chemical Stability of Ba-K-Bi-O Superconductor

Xie Min, Zhao Liangzhong   

  1. Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080
  • Received:1996-03-31 Revised:1996-07-01 Published:1996-12-10 Online:1996-12-10

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摘要： 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前景.但在BKBO超导器件走向实用化时,还必须了解它在环境介质中的化学稳定性,以便采取相应的保护措施.本文目的就是研究BKBO在各种介质中的稳定性及其作用机理.用电化学法在BKBO膜上制成了聚毗咯((PPy)和聚唾吩((PTh)膜,为BKBO超导器件的保护提供了新思路.

关键词: Ba－K－Bi－O超导体, 化学稳定性, 聚吡咯, 聚噻吩

Abstract: 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.

Key words: Ba-K-Bi-O superconductor, polypyrrole, polythiophene, chemical stability

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