Synthesis and Properties of Ceramics Based on a Layered Bismuth Calcium Cobaltite

被引：5
|
作者：
Klyndyuk, A. I. [1 ]
Krasutskaya, N. S. [1 ]
Khort, A. A. [2 ]
机构：
[1] Belarussian State Technol Univ, Ul Sverdlova 13A, Minsk 220006, BELARUS
[2] Belarussian Acad Sci, Lykov Inst Heat & Mass Exchange, Ul Brovki 15, Minsk 220072, BELARUS
来源：
INORGANIC MATERIALS | 2018年 / 54卷 / 05期
关键词：
oxide thermoelectrics; layered bismuth calcium cobaltite; thermal expansion; thermal conductivity; electrical conductivity; THERMOELECTRIC PROPERTIES; TRANSPORT; CO; ND;
D O I：
10.1134/S0020168518050059
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Bi2Ca2CoxOy (x = 0.5, 1.7, 2.8) ceramics have been prepared by solid-state reactions and their thermophysical, electrical-transport, and thermoelectric (functional) properties have been studied. The results demonstrate that increasing the cobalt oxide concentration in the ceramics leads to an increase in their thermal conductivity, electrical conductivity, and thermal diffusivity and a reduction in their apparent density. The largest Seebeck coefficient is offered by a single-phase ceramic with the composition Bi2Ca2Co1.7Oy, which in addition has the highest power factor (P-300 = 26.0 mu W/(m K-2)) and thermoelectric figure of merit (ZT(1000) = 0.019) and the smallest linear thermal expansion coefficient (alpha = 9.72 x 10(-6 )K(-1)).
引用
收藏
页码：509 / 514
页数：6
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