Open AccessThermoelectric properties of Nb-doped Sr1−x (La0.5Na0.5) x TiO3 perovskites
Author(s) -
Makoto Tachibana,
Ahmad Rifqi Muchtar,
Takao Mori
Publication year - 2021
Publication title -
applied physics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.911
H-Index - 94
eISSN - 1882-0786
pISSN - 1882-0778
DOI - 10.35848/1882-0786/ac42fe
Subject(s) - thermoelectric effect , tetragonal crystal system , doping , materials science , perovskite (structure) , electrical resistivity and conductivity , seebeck coefficient , phase boundary , analytical chemistry (journal) , thermal conductivity , phase (matter) , figure of merit , condensed matter physics , mineralogy , crystallography , chemistry , thermodynamics , physics , optoelectronics , organic chemistry , chromatography , quantum mechanics , composite material
We report the thermal conductivity ( κ ) of perovskite Sr 1− x (La 0.5 Na 0.5 ) x TiO 3 (0 ≤ x ≤ 1) and the thermoelectric properties of Nb-doped samples for x = 0.1 and 0.2. The κ of the solid solution shows a distinct minimum near the cubic-tetragonal phase boundary at x = 0.2, where the value becomes close to the minimum theoretical κ . Nb doping to x = 0.2 retains the high power factor found in Nb-doped SrTiO 3 , but also raises the κ to result in a thermoelectric figure of merit of 0.24 at 773 K.
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