Effect of Pb(BO2)2 Doping on Power Factor of Bi2Sr2Co1.8Oy Thermoelectric Ceramics

被引：2

作者：

Mumladze, G. A. ^{[1
]}

Kvartskhava, I. G. ^{[1
]}

Klyndyuk, A., I ^{[2
]}

Zhghamadze, V. V. ^{[1
]}

Margiani, N. G. ^{[1
]}

Kuzanyan, A. S. ^{[3
]}

机构：

[1] Georgian Tech Univ, Inst Cybernet, Z Anjaparidze 5, GE-0186 Tbilisi, Georgia

[2] Belarusian State Technol Univ, Dept Phys Colloid & Analyt Chem, Sverdlova Str 13a, Minsk 220006, BELARUS

[3] Natl Acad Sci Armenia, Inst Phys Res, Ashtarak 0203, Armenia

来源：

ACTA PHYSICA POLONICA A | 2022年 / 141卷 / 04期

基金：

美国国家科学基金会;

关键词：

Bi2Sr2Co1.8Oy thermoelectric; doping; resistivity; Seebeck coefficient; SUPERCONDUCTING PROPERTIES; LAYERED COBALTITE; PERFORMANCE;

D O I：

10.12693/APhysPolA.141.319

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this work, Pb(BO2)(2)-doped Bi2Sr2Co1.8Oy thermoelectric materials with composition Bi2-x[Pb(BO2)(2)](x)Sr2Co1.8Oy (x = 0, 0.075, 0.15, 0.25) were prepared through the solid-state reaction method. Electron transport and microstructural characteristics of prepared materials were studied, and values of their power factor were calculated. It was found that the slight doping of Bi2Sr2Co1.8Oy with lead borate leads to the decrease in electrical resistivity at 923 K from 126 to 76.5 m Omega cm for x = 0.15. The resistivity increases upon further Pb(BO2)(2) doping for x = 0.25. The increase in the Seebeck coefficient was observed with an increase in dopant content from x = 0.15 up to 0.25. The Pb(BO2)(2) doping resulted in a 1.8-fold enhancement of the power factor from 21.7 mu W/(m K-2) at 923 K in the reference sample to 38.2 mu W/(m K-2) in the doped sample with x = 0.15. Partial substitution of Bi2O3 by Pb(BO2)(2) also promotes both grain growth and densification of Bi2Sr2Co1.8Oy thermoelectric ceramics.

引用

页码：319 / 322

页数：4

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