Investigation on Crystal Structure and Oxide Ionic Conduction Path of LaGaO3-Based Oxide by in situ TOF Neutron Diffraction

被引：2

作者：

Kitamura, N. ^{[1
]}

Sugiyama, T. ^{[1
]}

Idemoto, Y. ^{[1
]}

Itoh, T. ^{[2
]}

机构：

[1] Tokyo Univ Sci, Fac Sci & Technol, 2641 Yamazaki, Noda, Chiba 2788510, Japan

[2] AGC Seimi Chem Co Ltd, Kanagawa 2538585, Japan

来源：

SOLID OXIDE FUEL CELLS 11 (SOFC-XI) | 2009年 / 25卷 / 02期

关键词：

PEROVSKITE-TYPE OXIDE;

D O I：

10.1149/1.3205713

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We focused on La0.8Sr0.2Ga0.8Mg0.2O3-delta (LSGM) and La0.8Sr0.2Ga0.8Mg0.115Co0.085O3-delta (LSGMC) with the perovskite structure as an electrolyte for solid oxide fuel cell, and investigated their crystal structures at elevated temperature by Rietveld technique using their neutron diffractions. As a result, it was indicated that the materials had a single phase of an orthorhombic structure (S. G.; Pnma) at the temperature range from 680 to 1073 K, regardless of the substituent cation species. Anisotropies of atomic displacement parameters of the oxygens, however, were supposed to be different between LSGM and LSGMC. Such a difference in the oxygen's behavior suggests different oxide-ion migration routes among the materials, and this may be one of the reasons why LSGMC shows higher oxide-ion conductivity than LSGM.

引用

页码：1737 / 1743

页数：7