摘要
通过熔炼研磨热压方法制备了n型和p型赝三元Bi2Te3基的热压合金样品,测量了由不同工艺参数(热压温度、热压压力)制备的样品Seebeck系数和电导率.分析了热压参数对热电性能产生的影响.特别是发现了增加热压压力和热压温度会使n型和p型热压样品的Seebeck系数和电导率都有所提高,这与单晶和取向晶体材料的Seebeck系数和电导率变化趋势相反的规律显然不同,其结果对热压样品的电学性能提高有积极的影响.
Seebeck coefficient and electrical conductivity of the N-type and beta-type Bi2Te3-based alloys prepared by melting/grinding/hot-pressing method for different process parameters (temperature and pressure of hot-pressing) were measured, and the effects of process parameters were analyzed. It has been found that the temperature and pressure of hot-pressing play very important roles in enhancing both Seebeck coefficient and electrical conductivity of the Bi-2 Te-3-based alloys. The phenomena are different from those of Bi-2 Te-3 single crystal and its oriented crystal in the electrical properties. Better electrical properties may be obtained.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第7期3321-3326,共6页
Acta Physica Sinica
基金
教育部科学技术研究重点项目(批准号:00163)
哈尔滨市重点科技攻关计划项目(批准号:0111210024)
黑龙江省教育厅科学技术计划项目(批准号:10541091)资助的课题.~~
