LSGM single crystals:: Crystal structure, thermal expansion, phase transitions and conductivity

被引：0

作者：

Vasylechko, L ^{[1
]}

Senyshyn, A ^{[1
]}

Pivak, Y ^{[1
]}

Berkowski, M ^{[1
]}

Vashook, V ^{[1
]}

Ullmann, H ^{[1
]}

Bähtz, C ^{[1
]}

Bismayer, U ^{[1
]}

机构：

[1] Lviv Polytech Natl Univ, Lvov, Ukraine

来源：

MIXED IONIC ELECTRONIC CONDUCTING PEROVSKITES FOR ADVANCED ENERGY SYSTEMS | 2004年 / 173卷

关键词：

Sr- and Mg-doped LaGaO3; single crystals; perovskites; crystal structure; thermal expansion; phase transitions; electrical conductivity;

D O I：

暂无

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Thermal behaviour of the La0.9Sr0.1Ga0.8Mg0.2O2.85 (LSGM-10) single crystal structure has been precisely investigated in a wide temperature range of 12 to 1300 K by means of high-resolution powder diffraction technique using synchrotron radiation. The conductivity in two orthogonal directions of the crystal has been studied in temperature range of 300 to 1270 K. Thermal behaviour of the lattice parameters and the structure refinement data indicate two phase transitions in LSGM-10: at 770 K (I2/a - R3c) and in the range 870 -970 K (R3c - R-3c). The behaviour of the AC conductivity conforms to the sequences of the phase transitions and agrees with the structural features of the different modifications of the LSGM-10.

引用

页码：231 / 237

页数：7

共 12 条

[1]

Akselrud L. G., 1993, MATER SCI FORUM, V133-136, P335

[2] Characterisation, conductivity and mechanical properties of the oxygen-ion conductor La0.9Sr0.1Ga0.8Mg0.2O3-x [J].