Optimization of thermoelectric properties of CoSb3 materials by increasing the complexity of chemical structure

Autor:	L.B. Wang, A.L. Yang, G.H. Zuo, H.L. Huang, Xiao Peng Jia, Aiqin Wang, Y.J. Zheng, Libo Deng, F.B. Wang
Rok vydání:	2020
Předmět:	Materials science Mechanical Engineering Chemical structure Doping Metals and Alloys engineering.material Thermoelectric materials Thermal conductivity Mechanics of Materials High pressure Phase (matter) Thermoelectric effect Materials Chemistry engineering Skutterudite Composite material
Zdroj:	Journal of Alloys and Compounds. 843:156063
ISSN:	0925-8388
DOI:	10.1016/j.jallcom.2020.156063
Popis:	As a representative thermoelectric material in the middle temperature region, skutterudite CoSb3 exhibits stable structure and excellent thermoelectric properties. Because of the special cage structure of CoSb3, it has been recognized that the thermoelectric performance of CoSb3 can be optimized by filling or doping. In this paper, we have studied the effects of doping alone, doping and filling phase combination, and the increase of atomic filling ratio on the thermoelectric properties of CoSb3 materials. In addition, under high temperature and high pressure (HPHT), the synthesizing cycle of CoSb3 material is only half an hour. The results show that the thermal conductivity of the samples decreases with the increase of the type and proportion of filled atoms. Finally, the maximum thermoelectric figure of merit ZT value of In0.2Ba0.2Co4Sb11.3Te0.7 reached 0.91 at 773K.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e4fb2575f3e2441b81de0c4ec192e382 https://doi.org/10.1016/j.jallcom.2020.156063 Zobrazit plný text záznamu Full Text from ScienceDirect