Synthesis of alumina nanoparticle-embedded-bismuth telluride matrix thermoelectric composite powders

被引：22

作者：

Kim, Kyung Tae ^{[1
]}

Koo, Hye Young ^{[1
]}

Lee, Gil-Geun ^{[2
]}

Ha, Gook Hyun ^{[1
]}

机构：

[1] Korea Inst Mat Sci, Powder Technol Dept, Changwon Si 641831, Gyeongnam, South Korea

[2] Pukyong Natl Univ, Div Mat Sci & Engn, Pusan 608739, South Korea

来源：

MATERIALS LETTERS | 2012年 / 82卷

关键词：

Bismuth telluride; Thermoelectric; Composite; Powders; Nanoparticles;

D O I：

10.1016/j.matlet.2012.05.053

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Alumina nanoparticle-embedded-bismuth telluride matrix (Al2O3/Bi2Te3) composite powders were synthesized by chemical routes that employ a polyol reduction process to Bi acetates and Te chlorides in the solvent. With application of the polyol process, the synthesized composite powders show a disc-shaped morphology with 50 nm thickness and 1 mu m diameter. High-resolution TEM images reveal that alumina nanoparticles are homogeneously embedded in the Bi2Te3 matrix powders. The Al2O3/Bi2Te3 nanocomposites sintered from the composite powders exhibit improved ZT values at room temperature compared to that of pure Bi2Te3 due to reduced thermal conductivity caused by active phonon and carrier scattering at the newly formed Al2O3/Bi2Te3 interface. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：141 / 144

页数：4

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