Synthesis, Electrical Conductivity and Seebeck Coefficient of La0.9A0.1FeO3 (A=Mg, Ca, Sr, Ba)

被引：4

作者：

Yin, Na ^{[1
]}

Wang, Hongchao ^{[1
]}

Wang, Chunlei ^{[1
]}

机构：

[1] Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2010年 / 26卷 / 12期

基金：

中国国家自然科学基金;

关键词：

La(0.9)A(0.1)FeO(3) ceramics; Electrical conductivity; Seebeck coefficient; THERMOELECTRIC PROPERTIES; MN; NI;

D O I：

10.1016/S1005-0302(11)60008-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Lanthanum ferrites ceramics La(0.9)A(0.1)FeO(3) (A=Mg, Ca, Sr, Ba) have been prepared by solid state reaction. X-ray power diffraction analysis reveals that all samples are of pure perovskite structure with orthorhombic phase. Electrical conductivity and Seebeck coefficient have been measured in vacuum within the temperature range between room temperature and 800 degrees C. The electrical conductivity shows semiconducting behavior. Temperature dependence of electrical conductivity indicates that adiabatic small-polaron hopping mechanism is dominant for their electric transportations. Seebeck coefficients are positive for samples, suggesting p-type conduction in the whole temperature range. The highest Seebeck coefficient is found to be 654 mu V/K for La0.9Mg0.1FeO3. Except La0.9Ba0.1FeO3, the electrical conductivity of La(0.9)A(0.1)FeO(3) increases with increasing atomic number of the A-site element, while Seebeck coefficient decreases.

引用

页码：1103 / 1106

页数：4

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