应用化学 ›› 1992, Vol. 0 ›› Issue (2): 56-59.

• 研究论文 • 上一篇    下一篇

Bi2O3-Y2O3系阻抗谱研究

黄克勤, 王常珍   

  1. 东北工学院, 沈阳 110006
  • 收稿日期:1991-02-25 修回日期:1991-08-20 出版日期:1992-04-10 发布日期:1992-04-10

AC COMPLEX IMPEDANCE STUDY ON SOLID STATE ELECTROLYTE OF Bi2O3-Y2O3

Huang Keqin, Wang Changzhen   

  1. Northeast University of Science aud Technology, Shengyang 110006
  • Received:1991-02-25 Revised:1991-08-20 Published:1992-04-10 Online:1992-04-10

摘要: 本文用交流阻抗法研究了Bi2O3-Y2O3系的阻抗谱。呈现特有的Warburg阻抗及其相关阻抗。在高氧分压下,电极过程由氧原子在三相线发生反应后直接进入电解质步骤控制;低氧分压下,由上述步骤和界面浓差极化共同控制,或仅由浓差极化控制。在氧分压为1.01×10-10~1.01×105Pa内时,Bi2O3-Y2O3系表现为纯氧离子导体。

关键词: Bi2O3-Y2O3, 交流阻抗, 氧离子导体, Warburg阻抗, 阻塞电阻

Abstract: Complex impedance diagram on Bi2O3-Y2O3 system was investigated using AC impedance method. It was found that Ba2O3-based materials are characteristic of the Warburg impedance. The rate-limiting step of the electrode process at high Po2 is the diffussion of oxygen atom into the solid electrolyte on the triple line. At low Po2 the electrode process is controlled by diffusson as well as by concentration polarization, or controlled only by concentration polarization. Ba2O3-Y2O3 system characterized as a pure oxygen icn conductor at Po2=1×1-10~1×105Pa.

Key words: Bi2O3-Y2O33, AC impedance, oxygen ion conductor, Warburg impedance, constriction resistance