Flower-like nanostructure and thermoelectric properties of hydrothermally synthesized La-containing Bi2Te3 based alloys

Y.H. Zhang; T.J. Zhu; J.P. TuX.B. Zhao

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Flower-like nanostructure and thermoelectric properties of hydrothermally synthesized La-containing Bi2Te3 based alloys

机译：Flower-like nanostructure and thermoelectric properties of hydrothermally synthesized La-containing Bi2Te3 based alloys

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摘要

Single-phase La-containing Bi2Te3 based nanopowders have been synthesized via a hydrothermal route using BiCl3, LaCl3, selenium and tellurium powders as the reactants, NaBH4 as the reductant, NaOH as the pH-value controller and ethylenediaminetetraacetic disodium salt (EDTA) as the additive. The synthesized powders have a flower-like morphology assembled by the side-by-side arrangement of the nano-sheets. Rietveld refinement analyses of crystal structure indicated that the alloyed lanthanum substituted bismuth at the 6c lattice position of Bi2Te3 based compounds. The thermoelectric property measurements of the hot-pressed samples showed that the substituting lanthanum in the Bi2Te3 based compounds was an n-type dopant. A ZT value of about 0.58 has been obtained for the La0.2Bi1.8Te3 alloy at 480 K.

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来源
《Materials Chemistry and Physics》 |2007年第3期|484-488|共5页
作者
Y.H. Zhang; T.J. Zhu; J.P. TuX.B. Zhao;
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作者单位

State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, PR China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种英语
中图分类工程材料学;
关键词
Nanostructures; Thermoelectric materials; Hydrothermal synthesis; Crystal structure;

Flower-like nanostructure and thermoelectric properties of hydrothermally synthesized La-containing Bi2Te3 based alloys

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