Oxygen non-stoichiometry and electrical conductivity of the binary strontium cobalt oxide SrCoOx

被引：48

作者：

Vashook, VV ^{[1
]}

Zinkevich, MV ^{[1
]}

Ullmann, H ^{[1
]}

Paulsen, J ^{[1
]}

Trofimenko, N ^{[1
]}

Teske, K ^{[1
]}

机构：

[1] TECH UNIV DRESDEN, INST ANORGAN CHEM, D-01062 DRESDEN, GERMANY

来源：

SOLID STATE IONICS | 1997年 / 99卷 / 1-2期

关键词：

strontium cobaltite; phase transformation; oxygen stoichiometry; electrical conductivity;

D O I：

10.1016/S0167-2738(97)00192-6

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：

Strontium cobaltite was investigated using solid-electrolyte coulometry and resistivity measurements in the temperature range 20-1050 degrees C and oxygen partial pressures 0.5-400 Pa. Two observed oxygen desorption/sorption maxima within the temperature range 500-950 degrees C correlate with phase transitions of this compound as reported in the literature. An additional oxygen desorption/sorption maximum was found at a temperature of 965-1000 degrees C, which is explained an order-disorder transition of the cubic high-temperature phase. The dependencies of equilibrium values of oxygen content as well as specific resistivity on temperature and oxygen partial pressure were founded for the cubic phase.

引用

页码：23 / 32

页数：10

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