物理化学学报 >> 1996, Vol. 12 >> Issue (09): 825-829.doi: 10.3866/PKU.WHXB19960910

研究论文 上一篇    下一篇

铋系2223相形成机理及单相块材的合成

高孝恢,高德,蒋淑芬   

  1. 中南工业大学化学系,长沙 410083|湖南大学化学化工系,长沙 410082
  • 收稿日期:1996-03-25 修回日期:1996-06-07 发布日期:1996-09-15
  • 通讯作者: 高孝恢

Mechanism of the Bi-base2223 Superconducting Phase Formation and its Single Phase Bulk Material Preparation

Gao Xiao-Hui,Gao De,Jiang Shu-Fen   

  1. Department of Chemistry,Central-South University of Technology,Changsha 410083|Department of Chemistry and Chemical Engineering,Hunan University,Changsha 410082
  • Received:1996-03-25 Revised:1996-06-07 Published:1996-09-15
  • Contact: Gao Xiao-Hui

摘要:

在化学动力学基础上,指出了Bi系2223超导相的形成,经历了先由2201相与CaO、CuO相互作用生成2212相,随后由2212相再与CaO及CuO作用产生2223相的过程.同时,论证了CaO面进入2212相元胞是形成2223相的控制步骤,用分步法及加入籽晶的工艺,制备了2223单相块材.

关键词: 超导相形成机理, 单相块材, 动力学

Abstract:

Based on kinetic considerations, it is pointed out that 2201 phase can interact with CaO, CuO to form 2212 phase, subsequently, 2223 phase can be produced by interaction between 2212 and CaO, CuO. Meanwhile, it is proved by chemical kinetics that CaO plane entering unit cell of 2212 phase is the controlling step of 2223 phase formation. In addition, divided step method as well as seed additive techniqe have been adopted to Prepare the 2223-single phase bulk material.

Key words: Mechanism of superconducting phases formation, 2223-single phase bulk, Kinetics