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政大機構典藏 > 理學院 > 應用物理研究所 > 期刊論文 > Item 140.119/80592

Please use this identifier to cite or link to this item: https://nccur.lib.nccu.edu.tw/handle/140.119/80592

Title:	Thermoelectric Figure of Merit Enhancement in Bi2Te3-Coated Bi Composites
Authors:	藍天蔚;Chen, Y. Y.
Contributors:	應物所
Keywords:	Thermoelectric figure of merit;thermal conductivity;bismuth;hydrothermal tellurium coating
Date:	2012-06
Issue Date:	2016-01-14 17:58:01 (UTC+8)
Abstract:	This study examines the thermoelectric behavior of composites containing hydrothermally processed tellurium-coated bismuth particles of various sizes. Since only a very thin layer of Bi2Te3 forms on the particle surface, the high-pressure compacted composite is still dominated by bismuth as the main ingredient (∼96% Bi). Thermoelectric figure of merit ZT values are derived from measurements of thermal conductivity, electrical resistivity, and Seebeck coefficient. As expected, a ZT value almost three times higher than that of bismuth is found. This enhancement appears to be caused mainly by lowered thermal conductivity due to the significant number of grain boundaries, short phonon mean free path in the coating layers, and lattice mismatch.
Relation:	Journal of Electronic Materials, 41(9), 2326-2330.
Data Type:	article
DOI 連結:	http://dx.doi.org/10.1007/s11664-012-2154-y
DOI:	10.1007/s11664-012-2154-y
Appears in Collections:	[應用物理研究所 ] 期刊論文

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