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- Title
Effects of Different Pressing Process on the Microstructure and Thermoelectric Properties of TiNiSn<sub>1-x</sub>Te<sub>x</sub> Half-Heusler Alloy Prepared by Microwave Method.
- Authors
Wang, Lin; Zhang, Ruipeng; Bo, Lin; Li, Fujin; Hou, Yangbo; Zuo, Min; Zhao, Degang
- Abstract
In this study, effects of different pressing processes on the microstructure and thermoelectric properties of TiNiSn1-xTex Half-Heusler alloy prepared by microwave method were investigated. TiNiSn1-xTex Half-Heusler alloys prepared by microwave synthesis-warm pressing-microwave sintering process had relatively higher density than those of samples prepared by microwave synthesis-cold pressing-microwave sintering (MCM) process. The XRD results showed that the diffraction peaks of TiNiSn1-xTex samples slightly shifted to the large angle direction because of the Te substitution on the Sn sites, and the intensity of impurity peak decreased after microwave sintering. Although the density of TiNiSn1-xTex samples prepared by MCM process was lower, the thermoelectric performance of TiNiSn0.99Te0.01 sample was significantly improved, which resulted from the decrease of resistivity and thermal conductivity due to the Te-doping. The thermal conductivity of TiNiSn0.99Te0.01 was within 1.21–1.61 Wm - 1 K - 1 over the whole temperature range, and its thermoelectric figure of merit ZT was the best.
- Subjects
HEUSLER alloys; MICROWAVES; MICROWAVE sintering; THERMOELECTRIC materials; MICROSTRUCTURE; THERMAL conductivity; ALLOYS
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2022, Vol 74, Issue 11, p4250
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-022-05464-0