SnTe thermoelectric materials with low lattice thermal conductivity synthesized by a self-propagating method under a high-gravity field

Autor:	Haojian Su, Zhicong Miao, Yuan Peng, Yalin Zhao, Shanshan Wu, Mingyue Jiang, Min Zhou, Rongjin Huang, Laifeng Li
Rok vydání:	2022
Předmět:	General Physics and Astronomy Physical and Theoretical Chemistry
Zdroj:	Physical Chemistry Chemical Physics. 24:29186-29194
ISSN:	1463-9084 1463-9076
DOI:	10.1039/d2cp04241j
Popis:	The conventional fabrication methods (for example, melting and powder metallurgy) of bulk thermoelectric materials are time- and energy-consuming, which restrict their large-scale application. In this work, ultra-fast self-propagating synthesis under a high-gravity field was used to prepare SnTe bulks, which shortened the synthesis time from several days to a few seconds. The grain growth was suppressed and some small pores were reserved in the matrix during the ultra-fast solidification process. The increased grain boundaries and pores (nanoscale to micron scale) enhanced phonon scattering, which greatly decreased the lattice thermal conductivity. The obtained minimum lattice thermal conductivity is 0.81 W m
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d52a7cda7a9a8c5660df8a628e90b18 https://doi.org/10.1039/d2cp04241j Zobrazit plný text záznamu