In situ neutron diffraction study on fast oxide ion conductor LaGaO3-based perovskite compounds

被引：42

作者：

Kajitani, M

Matsuda, M

Hoshikawa, A

Harjo, S

Kamiyama, T

Ishigaki, T

Izumi, F

Miyake, M ^{[1
]}

机构：

[1] Okayama Univ, Fac Environm Sci & Technol, Dept Environm Chem & Mat, Okayama 7008530, Japan

[2] Japan Atom Energy Res Inst, Tokai, Ibaraki 3191195, Japan

[3] High Energy Accelerator Res Org, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan

[4] Muroran Inst Technol, Dept Mat Sci & Engn, Muroran, Hokkaido 0508585, Japan

[5] Natl Inst Mat Sci, Adv Mat Lab, Tsukuba, Ibaraki 3050044, Japan

来源：

CHEMISTRY OF MATERIALS | 2005年 / 17卷 / 16期

关键词：

D O I：

10.1021/cm050597n

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 crystal structures of LaGaO3, LaGa0.9Mg0.1O2.95, and La0.9Sr0.1Mg0.1O2.9 have been investigated by high-temperature neutron powder diffraction in order to clarify a mechanism for high oxide ion conduction properties in LaGaO3-based compounds. Parent phase LaGaO3 crystallized in the orthorhombic (Pbnm) up to 150 degrees C and the rhombohedral (R (3) over barc) at between 160 and 800 degrees C. LaGa0.9Mg0.1O2.95 crystallized in the orthorhombic (Ibmm) up to 340 degrees C and the rhombohedral (R (3) over barc) at between 350 and 800 degrees C. On the other hand, La(0.9)Sr(0.1)Ga(0.1)Mgo(0.1)O(2.9) crystallized in the monoclinic (12/a) up to 400 degrees C and the rhombohedral (lR/a) at between 410 and 800 degrees C. The correlations between the crystal structures and conduction properties of LaGaO3-based materials were discussed on the basis of the analytical results.

引用

页码：4235 / 4243

页数：9

共 36 条

[1] Development of a low temperature operation solid oxide fuel cell [J].