Protonic conduction in Sr-doped (La1-xSmx)PO4

被引：21
|
作者：
Kitamura, N [1 ]
Amezawa, K
Tomii, Y
Yamamoto, N
Hanada, T
机构：
[1] Kyoto Univ, Dept Chem, Grad Sch Sci, Sakyo Ku, Kyoto 6068502, Japan
[2] Kyoto Univ, Grad Sch Human & Environm Studies, Sakyo Ku, Kyoto 6068501, Japan
[3] Kyoto Univ, Grad Sch Energy Sci, Sakyo Ku, Kyoto 6068501, Japan
来源：
SOLID STATE IONICS | 2004年 / 175卷 / 1-4期
关键词：
protonic conduction; rare earth orthophosphate; monazite; defect equilibrium;
D O I：
10.1016/j.ssi.2004.02.077
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：
High temperature protonic conduction in 1 mol% Sr-doped (La1-xSmx)PO4 (x=0.3, 0.5 and 0.7) with the monazite structure (S. G.: P2(1)/n) was investigated. The conductivities of the materials under wet atmosphere were considerably higher than those under dry atmosphere. From the conductivity measurements under H2O- and D2O-containing atmospheres, it was found that the magnitude of H/D isotope effect was 1.2-1.4. These results indicated that protonic conduction was dominant in the materials under wet atmosphere. The p(H2O) dependencies of the conductivities were discussed in terms of the defect equilibria, and, as a result, higher Sm content in 1 mol% Sr-doped (La1-xSmx)PO4 seemed more preferable for proton dissolution. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：563 / 567
页数：5
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