应用化学 ›› 1995, Vol. 0 ›› Issue (6): 97-98.

• 研究论文 • 上一篇    下一篇

碱熔法合成高温超导体的研究

赵良仲, 张金彪, 陈德俊, 徐翠英, 朱道本   

  1. 中国科学院化学研究所, 北京 100080
  • 收稿日期:1995-03-07 修回日期:1995-07-03 出版日期:1995-12-10 发布日期:1995-12-10
  • 基金资助:
    中国科学院物理研究所国家超导实验室资助课题

Synthesis of High-Tc Superconductors by Alkali Flux Method

Zhao Liangzhong, Zhang Jinbiao, Cheng Dejun, Xu Cuiying, Zhu Daoben   

  1. Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080
  • Received:1995-03-07 Revised:1995-07-03 Published:1995-12-10 Online:1995-12-10

摘要: 用固态化学反应法合成高温超导体时需要高温(800~1000℃)加热和重复研磨,能耗高,反应物混合难以均匀和操作不便.碱熔法是将反应物溶解于熔融的碱性介质之中,液相化学反应生成的超导化合物逐渐沉淀下来,经分离洗涤后直接可得超导化合物.该法合成温度低(一般为200~450℃),反应物混合均匀,操作简单,以及碱性介质有利于稳定高氧化态的金属离子或氧离子.

关键词: 高温超导体, 碱熔法, 合成

Abstract: La2-xMxCuO4(M=Ca,Sr,Ba) superconductors have been synthesized at 280~300℃ by precipitation from molten NaOH/KOH/KNO3.However,synthesis of Tm-Ca-Cu-O,Sr-Ca-Cu-O and Hg-Ba-Ca-Cu-O superconductors by using the alkali flux method are unsuccessful.A brief discussion for applicability of the alkali flux method has been given.

Key words: high-Tc superconductor, alkali flux method, synthesis