TY - JOUR
T1 - Preparation and thermoelectric properties of pseudogap intermetallic (Ti1-xVx)NiSi solid solutions
AU - Huang, Yi
AU - Nagai, Hiroki
AU - Hayashi, Kei
AU - Miyazaki, Yuzuru
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2019/1/15
Y1 - 2019/1/15
N2 - We theoretically and experimentally investigated the thermoelectric (TE) properties of TiNiSi-based solid solutions with a pseudogap at the Fermi level in the electronic band structure. Calculation of the TE properties of TiNiSi predicted that electron doping of TiNiSi leads to a higher power factor than hole doping. According to this prediction, we prepared the partially V-substituted TiNiSi-based compounds (Ti1-xVx)NiSi (x = 0, 0.05, 0.10, 0.15, and 0.20) using arc-melting and subsequent spark plasma sintering. An increase in the V content x improved the n-type TE properties: the absolute values of the Seebeck coefficient and electrical conductivity both increased, while the thermal conductivity slightly decreased. The highest dimensionless figure-of-merit, zT, was 0.032 at 600 K, obtained for the x = 0.20 sample.
AB - We theoretically and experimentally investigated the thermoelectric (TE) properties of TiNiSi-based solid solutions with a pseudogap at the Fermi level in the electronic band structure. Calculation of the TE properties of TiNiSi predicted that electron doping of TiNiSi leads to a higher power factor than hole doping. According to this prediction, we prepared the partially V-substituted TiNiSi-based compounds (Ti1-xVx)NiSi (x = 0, 0.05, 0.10, 0.15, and 0.20) using arc-melting and subsequent spark plasma sintering. An increase in the V content x improved the n-type TE properties: the absolute values of the Seebeck coefficient and electrical conductivity both increased, while the thermal conductivity slightly decreased. The highest dimensionless figure-of-merit, zT, was 0.032 at 600 K, obtained for the x = 0.20 sample.
KW - Electronic structure
KW - Pseudogap
KW - Thermoelectric property
KW - TiNiSi-type compound
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U2 - 10.1016/j.jallcom.2018.08.238
DO - 10.1016/j.jallcom.2018.08.238
M3 - Article
AN - SCOPUS:85052620328
VL - 771
SP - 111
EP - 116
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -