高压制备AgSbTe2的微结构及高温电学性能研究  

Microstructure and high temperature electrical properties of AgSbTe_2 synthesized by high pressure

作　　者：樊浩天[1] 宿太超[1] 李洪涛[2] 朱红玉[1] 郑友进[3] 刘丙国[1] 胡美华[1] 李尚升[1] 马红安[4] 贾晓鹏[1,4] 

机构地区：[1]河南理工大学材料科学与工程学院/环境友好型无机材料河南省高校(河南省)重点实验室培育基地,河南焦作454000 [2]上海出入境检验检疫局,上海200135 [3]牡丹江师范学院理学院,黑龙江牡丹江157011 [4]吉林大学超硬材料国家重点实验室,长春130012

出　　处：《功能材料》2014年第B12期41-43,48,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51001042,11204067);中国博士后科学基金资助项目(2012M521393);河南省高校科技创新团队支持计划资助项目(2012IRTSTHN007);黑龙江省自然科学基金资助项目(E201341);牡丹江师范学院国家级重点创新预研资助项目(GY201206);牡丹江市科技公关资助项目(G2013e1233);牡丹江师范学院超硬材料重点实验室开放课题资助项目(201303,201304);河南理工大学青年基金资助项目(Q2012-48);河南省教育厅科学技术研究重点资助项目(14B140006)

摘　　要：采用高压合成技术,制备出了热电材料AgSbTe2,并且研究了AgSbTe2样品微结构和高温电学输运性质。X射线衍射测试结果表明,高压合成的AgSbTe2样品中含有微量的Sb2Te3,电子能谱测试结果表明Ag、Sb、Te 3种元素分布很均匀。电学性能测试表明,在高压的作用下,AgSbTe2样品的载流子浓度增大;随着测试温度的升高,电导率降低,Seebeck系数增大。4 GPa高压合成的AgSbTe2样品在573 K温度下具有最高的功率因子(约18.1μW/(cm·K2))。Thermoelectric materials AgSbTe2 were synthesized by high pressure method. The microstructure and temperature dependent electrical properties were studied. The AgSbTe2 samples are near single phase with the structure of NaC1. The result of X-ray diffraction indicates that the AgSbTe2 samples contain trace amount of Sb2Te3. The result of electronic probe shows that the three elements （Ag, Sb,Te） are evenly distributed. The Seebeck coefficient and electrical resistivity are measured from room temperature to 573 K. The results of elec- trical properties declare that the carrier concentration of AgSbTe2 samples increases with an increase of pres- sure, and the electrical conductivity of AgSbTe2 samples decreases with the increase of temperature while the Seebeck coefficient increases. The maximum power factor for the sample synthesized at 4.0 GPa reaches 18.1 μW/（cm＊ K2） at 573 K.

关 键 词：高压 微结构 电学性能 AgSbTe 功率因子 

分 类 号：O521.2[理学—高压高温物理]