期刊
MATERIALS RESEARCH LETTERS
卷 5, 期 3, 页码 187-194出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/21663831.2016.1244116
关键词
High-entropy alloys; thermoelectric; low thermal conductivity
资金
- National Natural Science Foundation of China [51531001, 51671018, 51422101, 51271212, 51371003]
- 111 Project [B07003]
- International S&T Cooperation Program of China [2015DFG52600]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT_14R05]
- Top-Notch Young Talents Program
- Fundamental Research Fund for the Central Universities [FRF-TP-15-004C1, FRF-TP-14-009C1]
- Program for New Century Excellent Talents in University [NCET-13-0663]
In our study, we designed the PbSnTeSe high-entropy alloy (HEA) and investigated its microstructure and thermoelectric properties. It was found that the PbSnTeSe HEA has a simple face-centered cubic structure and possesses quite low lattice thermal conductivity at low temperatures, which could be ascribed to the strong phonon scattering due to its severe lattice-distortion. Minor additions of La not only enhanced both Seebeck coefficient and electrical conductivity at high temperatures, but also suppressed the bipolar effect to some degree. Our results indicate that the HEA concept could be applied for developing promising thermoelectric materials, which merits further investigation.
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