Bi_2Te_3和Bi_(0.5)Sb_(1.5)Te_3的机械合金化法制备及其热电性能  

Mechanical alloying and thermoelectric properties of Bi_2Te_3 and Bi_(0.5)Sb_(1.5)Te_3

作　　者：胡淑红[1] 赵新兵[1] 朱铁军[1] 邬震泰[1] 周邦昌[1] 

机构地区：[1]浙江大学材料科学与工程学系,硅材料国家重点实验室杭州310027

出　　处：《中国有色金属学报》2000年第S1期73-76,共4页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金!资助项目 ( 59971 0 4 4);教育部博士点基金!资助项目 ( 970 3351 8)

摘　　要：用机械合金法制备了Bi2 Te3和Bi0 .5Sb1 .5Te3两种热电材料。XRD分析表明两种材料分别在球磨 1 75h和 31 5h后完全合金化。机械合金化合金粉末冷压后在不同温度烧结并测量了热电性能 ,其中Bi0 .5Sb1 .5Te3材料480℃烧结样的最高Seebeck系数约为 2 0 0 μV/K。Bi_2Te_3 and Bi_0.5Sb_1.5Te_3 thermoelectric materials were prepared by mechanical alloying. The alloying formation was analyzed by XRD. It was found that Bi_2Te_3 and Bi_0.5Sb_1.5Te_3 alloys were synthesized after milled for 175 and 315 h, respectively. Alloying powders were cold pressed and sintered at different temperatures. The thermoelectric properties of the sintered samples were measured. The maximum Seebeck coefficient of Bi_0.5Sb_1.5Te_3 samples sintered at 480 ℃ was found to be about 200 μV/K.

关 键 词：机械合金化 热电材料 Bi₂Te₃ Bi_0.5Sb_1.5Te₃ 热电性能 

分 类 号：TG13[一般工业技术—材料科学与工程]