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

页码：563 / 567

页数：5

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