DOI10.19728/1672-6634.20230200101672-6634004-0059-08文章编号Aug.2023JournalofLiaochengUniversity(Nat.Sci.)2023年8月Vol.36No.4聊城大学学报（自然科学版）第4期第36卷AgBiSe2合金化稳定SnSe立方相结构及其热电性能的研究祝军亮1，李福金1，赵令浩1²，赵德刚1（1.济南大学材料科学与工程学院，山东济南250024；2.中国科学院深圳先进技术研究院广东深圳518055）摘要SnSe是一种具有简单结构的二元化合物。在约793K时，SnSe发生相变，随温度的升高，SnSe会从低对称低温相（Pnma）转变为高对称高温相（Cmcm）。除去这两种层状结构，另一种立方相（Fm3m）结构的SnSe也被热力学证明可以稳定存在。近年来，正交相SnSe得到了广泛的发展，亚稳态立方相SnSe作为有潜力热电材料的候选材料之一也受到了广泛的关注。通过真空熔融-退火-球磨-急速热压工艺合金化Ag-BiSe2来稳定SnSe的立方相结构。通过AgBiSe2的合金化可得到较高的载流子浓度和较强的声子缺陷散射。随着功率因子的增加，热导率的减小，样品的热电性能得到了显著提高。关键词SnSe；热电材料；立方相；热电性能中图分类号TN37文献标识码A开放科学（资源服务）标识码（OSID)StudyontheStructureandThermoelectricPerformanceofSnSeCubicPhaseStabilizedbyAgBiSe2AlloyingZHUJunliang',LIFujin',ZHAOLinghaol.²2,ZHAODegang'(1.SchoolofMaterialsScienceandEngineering,UniversityofJinan,Jinan250024,China;2.ShenzhenInstituteofAdvancedTechnology,ChineseAcademyofSciences,Shenzhen518055,China)AbstractSnSeisabinarycompoundwithsimplestructure.Atabout793K,SnSecanundergoaphasetransition.Withtheincreaseoftemperature,SnSecantransformfromlowsymmetricphase(Pnma)atlowtemperaturetohighsymmetricphase(Cmcm)athightemperature.Apartfromthesetwolayeredstructures,anothercubicphase(Fm3m)SnSehasalsobeenthermodynamicallyprovedtoexiststably.Recently,orthorhombicSnSehadanextensivedevelopment.ThemetastablecubicphaseSnSehasre-ceivedgreatattentionasoneofcandidatesofpromisingthermoelectricmaterials.Herein,thecubicphaseofSnSewasstabilizedbyAgBiSezalloyingwithavacuummelting-annealing-ballmilling-rapidlyhot-press-ingsinteringprocess.ThealloyingofAgBiSe2resultedinthehighercarrierconcentrationandstrongerphonondefectscattering.Withtheincreaseofthep...
