Thermoelectric SnS and SnS-SnSe solid solutions prepared by mechanical alloying and spark plasma sintering: Anisotropic thermoelectric properties

被引：66

作者：

Asfandiyar ^{[1
]}

Wei, Tian-Ran ^{[1
]}

Li, Zhiliang ^{[1
]}

Sun, Fu-Hua ^{[1
]}

Pan, Yu ^{[1
]}

Wu, Chao-Feng ^{[1
]}

Farooq, Muhammad Umer ^{[2
]}

Tang, Huaichao ^{[1
]}

Li, Fu ^{[3
,4
,5
]}

Li, Bo ^{[3
]}

Li, Jing-Feng ^{[1
]}

机构：

[1] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

[2] Xinjiang Inspect Inst Special Equipment, Urumqi 830011, Peoples R China

[3] Tsinghua Univ, Grad Sch Shenzhen, Adv Mat Inst, Shenzhen 518055, Peoples R China

[4] Shenzhen Univ, Sch Phys & Energy, Shenzhen 518060, Peoples R China

[5] Shenzhen Univ, Shenzhen Key Lab Sensor Technol, Shenzhen 518060, Peoples R China

来源：

SCIENTIFIC REPORTS | 2017年 / 7卷

关键词：

THERMAL-CONDUCTIVITY; TRANSPORT-PROPERTIES; BULK MATERIALS; PERFORMANCE; FIGURE; MERIT; IMPACT;

D O I：

10.1038/srep43262

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

P-type SnS compound and SnS1-xSex solid solutions were prepared by mechanical alloying followed by spark plasma sintering (SPS) and their thermoelectric properties were then studied in different compositions (x = 0.0, 0.2, 0.5, 0.8) along the directions parallel (//) and perpendicular (perpendicular to) to the SPS-pressurizing direction in the temperature range 323-823 K. SnS compound and SnS1-xSex solid solutions exhibited anisotropic thermoelectric performance and showed higher power factor and thermal conductivity along the direction. than the // one. The thermal conductivity decreased with increasing contents of Se and fell to 0.36 W m(-1) K-1 at 823 K for the composition SnS0.5Se0.5. With increasing selenium content (x) the formation of solid solutions substantially improved the electrical conductivity due to the increased carrier concentration. Hence, the optimized power factor and reduced thermal conductivity resulted in a maximum ZT value of 0.64 at 823 K for SnS0.2Se0.8 along the parallel direction.

引用

页数：7

共 32 条

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