熔体处理对Bi0.4Sb1.6Te3+5%的Te合金热电性能的作用

高娜; 王小宇; 朱彬; 余愿; 祖方遒

doi:10.15980/j.tzzz.2018.04.022

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熔体处理对Bi_0.4Sb_1.6Te₃+5%的Te合金热电性能的作用
Effects of Liquid State Manipulation on Thermoelectric Behavior of the P-type Bi_0.4Sb_1.6Te₃+5%Te Alloy
2018年38卷第4期页码：429-432
纸质出版日期： 2018 ，
DOI： 10.15980/j.tzzz.2018.04.022

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[1]高娜,王小宇,朱彬,余愿,祖方遒.熔体处理对Bi_(0.4)Sb_(1.6)Te_3+5%的Te合金热电性能的作用[J].特种铸造及有色合金,2018,38(04):429-432.

Gao Na, Wang Xiaoyu, Zhu Bin, et al. Effects of Liquid State Manipulation on Thermoelectric Behavior of the P-type Bi_0.4Sb_1.6Te₃+5%Te Alloy[J]. Special Casting & Nonferrous Alloys, 2018,38(4):429-432.
[1]高娜,王小宇,朱彬,余愿,祖方遒.熔体处理对Bi_(0.4)Sb_(1.6)Te_3+5%的Te合金热电性能的作用[J].特种铸造及有色合金,2018,38(04):429-432. DOI： 10.15980/j.tzzz.2018.04.022.

Gao Na, Wang Xiaoyu, Zhu Bin, et al. Effects of Liquid State Manipulation on Thermoelectric Behavior of the P-type Bi_0.4Sb_1.6Te₃+5%Te Alloy[J]. Special Casting & Nonferrous Alloys, 2018,38(4):429-432. DOI： 10.15980/j.tzzz.2018.04.022.

摘要

采用直流4电极法探索P型Bi

0.4

1.6

+5%的Te合金的熔体结构转变温度范围

在此基础上

采用不同熔体处理工艺得到母合金

随后采用球磨、SPS烧结技术制备块体材料。结果表明

经历熔体结构转变后

烧结试样的电导率有明显提升

而Seebeck系数略有降低

故其功率因子增加。由于熔体结构转变试样具有更多的晶界以及晶体结构缺陷

增强声子的散射

使合金的热导率显著降低。因此经历熔体结构转变的试样具有更优的热电性能

且在120℃时ZT（热电材料性能参数）值最大

为1.17。

Abstract

The temperature range of liquid structural transition（LST）for P-type Bi

0.4

1.6

+5%Te alloy was explored by the direct current four-probe method.And then

the parent ingots with different melt states were prepared

respectively

which were subjected to ball milling followed by SPS sintering technology to prepare bulky materials.It is found that the electrical conductivity of the sintered samples after LST is superior significantly to that of the ones without structural transition

while the Seebeck coefficient is decreased slightly

therefore the power factor of the sintered samples is increased slightly.Meanwhile

the induced crystal structure defects in the sample after LST can lead to a strongly scattering of the phonons and thus the thermal conductivity is suppressed significantly.As a result

the sample after LST has the better thermoelectric properties

and the highest ZT value of 1.17 is presented at 120℃.

关键词

熔体结构转变热电材料Bi0.4Sb1.6Te3热电性能

Keywords

Liquid Structural TransitionThermoelectric MaterialsBi0.4Sb1.6Te3Thermoelectric Properties

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