Open AccessEFFECT OF FEATURES IN GRAIN STRUCTURE ON THE THERMOELECTRIC PROPERTIES OF COMPOUNDS BASED ON BISMUTH TELLURIDE
Author(s) -
О. N. Ivanov,
Maxim Yaprintsev,
А. Э. Васильев,
Elena Danshina
Publication year - 2022
Publication title -
steklo i keramika
Language(s) - English
Resource type - Journals
ISSN - 0131-9582
DOI - 10.14489/glc.2022.01.pp.003-011
Subject(s) - bismuth telluride , thermoelectric effect , materials science , grain boundary , electrical resistivity and conductivity , grain size , bismuth , thermoelectric materials , thermal conductivity , telluride , metallurgy , evaporation , mineralogy , composite material , chemistry , thermodynamics , microstructure , physics , electrical engineering , engineering
Specific mechanisms of grain structure effect on the thermoelectric properties (specific electrical resistivity and total thermal conductivity) of the Bi1.9Gd0.1Te3 compound have been analyzed. These mechanisms are as follows: 1) forming the surface Te vacancies at grain boundaries acting as donor centres; 2) changing the elemental composition of the grains at high-temperature Te evaporation under thermal treatment of material to prepare the samples with desired average grain size.