稀有金属材料与工程
稀有金屬材料與工程
희유금속재료여공정
RARE METAL MATERIALS AND ENGINEERNG
2008年
12期
2177-2180
,共4页
彭江英%杨君友%鲍思前%王艳丽%张同俊
彭江英%楊君友%鮑思前%王豔麗%張同俊
팽강영%양군우%포사전%왕염려%장동준
半导体%热电材料%电性能%热性能
半導體%熱電材料%電性能%熱性能
반도체%열전재료%전성능%열성능
semiconductors%thermoelectric materials%electrical properties%thermal properties
采用机械合金化-热压成形-退火工艺制备了部分填充Skutterudite化合物LayCo4-xFexSb12(x≤1,),y≤1),对比研究了填充化合物LayCo3.5Fe0.5Sb12与未填充化合物Co3.5Fe0.5Sb12的热电性能.结果表明,稀土元素La的填充使热导率显著下降,但同时也降低了功率因子,导致材料热电优值上升不大.因此,要提高材料热电优值,还须优化材料电性能.
採用機械閤金化-熱壓成形-退火工藝製備瞭部分填充Skutterudite化閤物LayCo4-xFexSb12(x≤1,),y≤1),對比研究瞭填充化閤物LayCo3.5Fe0.5Sb12與未填充化閤物Co3.5Fe0.5Sb12的熱電性能.結果錶明,稀土元素La的填充使熱導率顯著下降,但同時也降低瞭功率因子,導緻材料熱電優值上升不大.因此,要提高材料熱電優值,還鬚優化材料電性能.
채용궤계합금화-열압성형-퇴화공예제비료부분전충Skutterudite화합물LayCo4-xFexSb12(x≤1,),y≤1),대비연구료전충화합물LayCo3.5Fe0.5Sb12여미전충화합물Co3.5Fe0.5Sb12적열전성능.결과표명,희토원소La적전충사열도솔현저하강,단동시야강저료공솔인자,도치재료열전우치상승불대.인차,요제고재료열전우치,환수우화재료전성능.
Partially filled Skutterudite compounds LayCo4-xFe-xSb12(x≤1,y≤1)have been synthesized via mechanical alloying-hot pressing-annealing process and the thermoelectric properties of LayCo3.5Fe0.5Sb12 have been investigated with respect to unfilled Co3.5Fe0.5Sb12.It is found that La filling makes the thermal conductivity decreasing dramatically and power factor decreasing simultaneously,yielding a small increase of ZT values.To enhance ZT values,the electrical property has to be optimized.
