High temperature sublimation behavior of antimony in CoSb3 thermoelectric material during thermal duration test

被引：64

作者：

Zhao, Degang ^{[1
]}

Tian, Changwen ^{[1
]}

Liu, Yunteng ^{[1
]}

Zhan, Chengwei ^{[1
]}

Chen, Lidong ^{[2
]}

机构：

[1] Shandong Acad Sci, Inst New Mat, Jinan 250014, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Ceram, Energy Mat Res Ctr, Shanghai 200050, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 06期

关键词：

Antimony; Thermoelectric; Sublimation; CoSb3; OXIDATION BEHAVIOR; HIGH-PRESSURE; ALLOYS;

D O I：

10.1016/j.jallcom.2010.11.204

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：

The thermal duration test of CoSb3 thermoelectric material was studied from 600 degrees C to 750 degrees C in vacuum. The present work showed that the sublimation of antimony in CoSb3 material obeyed a parabolic law. Effective activation energy for the sublimation of antimony in CoSb3 was estimated to be 44.5 kJ/mol. SEM results showed that the grain-boundary crack appeared in the initial period of test and the crack gradually evolved into the micro-void after thermal duration test. During the thermal duration period, the surface of CoSb3 became degraded seriously and some bubbles of gasified antimony appeared on the samples. After thermal duration test of 16 days at 750 degrees C, thermoelectric performance of CoSb3 declined obviously and ZT value decreased from 0.24 to 0.16 at 327 degrees C. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：3166 / 3171

页数：6

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