Enhanced thermoelectric properties of bismuth telluride bulk achieved by telluride-spilling during the spark plasma sintering process

Ge, Zhen-Hua1; Ji, Yi-Hong1; Qiu, Yang2; Chong, Xiaoyu1; Feng, Jing1; He, Jiaqing2

2018-01-15

10.1016/j.scriptamat.2017.09.020

SCRIPTA MATERIALIA   影响因子和分区

1359-6462

We offered a new and simple routine for significant reducing lattice thermal conductivity and improve the thermoelectric properties of Bi2Te3 materials. Dense dislocations were introduced by means of adding excess Te into Bi2Te3 powder by combining ball milling and spark plasma sintering (SPS). During the high temperature SPS process, excess Te spilled out of the die. The ultra-low lattice thermal conductivity of Bi2Te3 was achieved due to the enhanced phonon scattering by dislocations. The highest ZT value of 0.7 at 398 K was obtained for a pure Bi2Te3 bulk sample which is 175% higher than that of pristine Bi2Te3 sample. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Thermoelectric Bi2Te3 Mechanical alloying Spark plasma sintering Dislocations

SCI ; EI

英语

通讯

Science, Technology, and Innovation Commission of Shenzhen Municipality[KQCX2015033110182370] ; Science, Technology, and Innovation Commission of Shenzhen Municipality[JCYJ20150831142508365]

Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000413609500020

PERGAMON-ELSEVIER SCIENCE LTD

20173804184711

Ball milling ; Crystal lattices ; Dislocations (crystals) ; Mechanical alloying ; Spark plasma sintering ; Tellurium ; Thermal conductivity ; Thermoelectric equipment ; Thermoelectricity

Metallurgy and Metallography:531 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Thermoelectric Energy:615.4 ; Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Chemical Operations:802.3 ; Crystal Lattice:933.1.1

MATERIALS SCIENCE

Web of Science

1.Kunming Univ Sci & Technol, Fac Mat Sci & Engn, Kunming 650093, Yunnan, Peoples R China
2.South Univ Sci & Technol China, Dept Phys, Shenzhen Key Lab Thermoelect Mat, Shenzhen 518055, Peoples R China

Ge, Zhen-Hua,Ji, Yi-Hong,Qiu, Yang,et al. Enhanced thermoelectric properties of bismuth telluride bulk achieved by telluride-spilling during the spark plasma sintering process[J]. SCRIPTA MATERIALIA,2018,143:90-93.

Ge, Zhen-Hua,Ji, Yi-Hong,Qiu, Yang,Chong, Xiaoyu,Feng, Jing,&He, Jiaqing.(2018).Enhanced thermoelectric properties of bismuth telluride bulk achieved by telluride-spilling during the spark plasma sintering process.SCRIPTA MATERIALIA,143,90-93.

Ge, Zhen-Hua,et al."Enhanced thermoelectric properties of bismuth telluride bulk achieved by telluride-spilling during the spark plasma sintering process".SCRIPTA MATERIALIA 143(2018):90-93.