Enhancing thermoelectric performance of SnTe via nanostructuring particle size

Zhang, Xiao1; Zhou, Yiming1; Pei, Yanling1; Chen, Yuexing2; Yuan, Bifei3; Zhang, Shuangmei1; Deng, Yuan1; Gong, Shengkai1; He, Jiaqing2; Zhao, Li-Dong1

2017-06-30

10.1016/j.jallcom.2017.02.283

JOURNAL OF ALLOYS AND COMPOUNDS   影响因子和分区

0925-8388

1873-4669

SnTe, one lead-free analogue of PbTe, has been paid attention in thermoelectric community because it has the similar rock-salt crystal structure and electronic band structure. However, SnTe possesses a very high total thermal conductivity (similar to 10.0 W m(-1) K-1 at room temperature) and a mediocre ZT (similar to 0.2 at 723 K). In this study, to reduce its thermal conductivity, we prepare SnTe samples by melting reaction followed by mechanical alloying and spark plasma sintering. We demonstrate that both total thermal conductivity and lattice thermal conductivity can be considerably reduced through reducing particle size from micro-scale to nano-scale via facially mechanical alloying method. Experimental results show that the total thermal conductivity at room temperature can be reduced from similar to 10 W m(-1) K-1 for SnTe ingot to similar to 3Wm(-1) K-1 for SnTe with mechanical alloying 25 h. Correspondingly, the lattice thermal conductivity at room temperature was reduced from similar to 5Wm(-1) K-1 to similar to 2Wm(-1) K-1. Combination of reduced thermal conductivity and moderate power factor, average ZT(ave) can be increased by 33.3%, from 0.09 for SnTe ingot to 0.12 for SnTe with nano-grain size. (C) 2017 Published by Elsevier B.V.

Thermoelectric SnTe Mechanical alloying Thermal conductivity ZT(ave)

SCI ; EI

英语

其他

[KQTD2016022619565911]

Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering

Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000401042300070

ELSEVIER SCIENCE SA

20171203489665

Crystal lattices ; Grain size and shape ; Ingots ; IV-VI semiconductors ; Mechanical alloying ; Nanotechnology ; Particle size ; Spark plasma sintering ; Thermoelectricity ; Tin alloys ; Tin compounds

Metallurgy and Metallography:531 ; Foundry Practice:534.2 ; Tin and Alloys:546.2 ; Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Nanotechnology:761 ; Crystal Lattice:933.1.1

MATERIALS SCIENCE

Web of Science

1.Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
2.South Univ Sci & Technol China, Dept Phys, Shenzhen 518055, Peoples R China
3.China Natl Petr Corp, Greatwall Drilling Co, Beijing 100101, Peoples R China

Zhang, Xiao,Zhou, Yiming,Pei, Yanling,et al. Enhancing thermoelectric performance of SnTe via nanostructuring particle size[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2017,709:575-580.

Zhang, Xiao.,Zhou, Yiming.,Pei, Yanling.,Chen, Yuexing.,Yuan, Bifei.,...&Zhao, Li-Dong.(2017).Enhancing thermoelectric performance of SnTe via nanostructuring particle size.JOURNAL OF ALLOYS AND COMPOUNDS,709,575-580.

Zhang, Xiao,et al."Enhancing thermoelectric performance of SnTe via nanostructuring particle size".JOURNAL OF ALLOYS AND COMPOUNDS 709(2017):575-580.