PROTON DIFFUSIVITY IN SRZRO3-SC3+ SINGLE-CRYSTALS STUDIED BY INFRARED-ABSORPTION SPECTROSCOPY

被引:40
作者
YUGAMI, H
SHIBAYAMA, Y
HATTORI, T
ISHIGAME, M
机构
[1] Research Institute for Scientific Measurements, Tohoku University, Aoba-ku, Sendai, 980-77
关键词
PROTON CONDUCTORS; INFRARED ABSORPTION; DIFFUSION COEFFICIENT;
D O I
10.1016/0167-2738(95)00057-D
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The diffusivity of protons in Sc3+ doped-SrZrO3 single crystals have been determined by the infrared absorption technique in the temperature range of 400-750 degrees C. The proton diffusion coefficient D has been evaluated by two different methods, i.e. (1) the sudden change of P-H2O and (2) the exchange between H+ and D+-vapor. It is found that the D value of proton obtained in SrZrO3 single crystals is smaller than that obtained in ceramics, and the activation energy of D obtained by the method (1) is larger than that of ceramics. From these results, comes a suggestion that the defect concentration (or distribution) in the ceramics grains may be different from that in single crystals.
引用
收藏
页码:171 / 176
页数:6
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