Thermoelectric properties of TiS2-xPbSnS3 nanocomposites

Thermoelectric properties of TiS2-xPbSnS3 nanocomposites
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TiS2-xPbSnS3 纳米复合材料的热电性能

DOI:
10.1016/j.jallcom.2016.12.088
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发表时间:
2017-03
影响因子:
6.2
通讯作者:
王一峰
王一峰
中科院分区:
材料科学2区
文献类型:
--
作者:
王一峰

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研究了含有p型PbSnS 3纳米颗粒的微尺度TiS 2陶瓷在350 ~ 650 K范围内的热电性能。PbSnS 3的加入导致了Seebeck系数的显著提高和电导率的降低,主要是由于载流子浓度的降低,而当PbSnS 3在复合材料中不超过1 mol%时,功率因数几乎不恶化。PbSnS 3的加入降低了材料的电导率。此外,晶格热导率的抑制最多的是在0.5摩尔%的PbSnS 3,这是纳米级分散主要沿着TiS 2晶界。结果表明,在650 K时,TiS 2 -0.5mol%PbSnS3体系的zT最高,达到0.44,是目前TiS 2基热电材料中最好的。
Thermoelectric properties of micro-scalen-type TiS2ceramics containingp-type PbSnS3nanoparticles were investigated from 350 to 650 K. The addition of PbSnS3caused a substantial enhancement of Seebeck coefficient and a decrease of electrical conductivity, primarily due to the decrease of carrier concentration, while keeping power factor almost non-deteriorated with PbSnS3no more than 1 mol% in the composite. The electrical thermal conductivity was decreased with PbSnS3addition. Moreover, the lattice thermal conductivity was suppressed most in the composite with 0.5 mol% PbSnS3which was nano-scale dispersed mainly along the TiS2grain boundaries. As a result, a maximumzT∼0.44 at 650 K was obtained in TiS2-0.5mol%PbSnS3, ranking among the tops for TiS2-based thermoelectrics so far.
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