山东科学2026，Vol.39Issue(2)：20-26,7.DOI:10.3976/j.issn.1002-4026.2025171
Bi掺杂调控Ge0.8Mn0.1Pb0.1Te合金热电性能的研究
Thermoelectric properties of Bi-doped Ge0.8Mn0.1Pb0.1Te alloys
摘要
Abstract
GeTe-based alloys have attracted considerable attention as promising mid-temperature thermoelectric materials owing to their excellent performance.In this study,a series of Ge0.8-xMn0.1Pb0.1BixTe alloys were synthesized by vacuum melting followed by hot-press sintering.The results demonstrate that Bi incorporation significantly enhances the Seebeck coefficient.With increasing Bi content,the crystal structure gradually evolves from a rhombohedral to a cubic phase.Simultaneously,Bi-induced lattice distortion intensifies phonon scattering,leading to a marked reduction in lattice thermal conductivity,while the electronic thermal conductivity also decreases as a result of reduced electrical conductivity.At 773 K,the total thermal conductivity of Ge0.78Mn0.1Pb0.1Bi0.02Te reaches a low value of 1.34 W/(m·K).Consequently,the alloys exhibit enhanced thermoelectric figure of merit(ZT)values in the low-to-mid temperature range while maintaining high ZTat elevated temperatures,yielding a high average thermoelectric figure of merit(ZT,avg)of 0.80.关键词
热电材料/元素掺杂/GeTe/热导率/热电优值Key words
thermoelectric materials/doping/GeTe/thermal conductivity/thermoelectric figure of merit分类
通用工业技术引用本文复制引用
孙兵,王麒栋,张军祥,孟振振,陈婷婷..Bi掺杂调控Ge0.8Mn0.1Pb0.1Te合金热电性能的研究[J].山东科学,2026,39(2):20-26,7.基金项目
国家自然科学基金(12204355,52272210) （12204355,52272210）
山东省自然科学基金(ZR2023QE282,ZR2022QA018,ZR2022QA009) （ZR2023QE282,ZR2022QA018,ZR2022QA009）
山东省氮化镓材料与应用重点实验室 （）
济南市X射线光学重点实验室开放课题(2024JKLXOOP003) （2024JKLXOOP003）
