高压制备Ag_(1-x)Pb_(18)SbTe_(20)及其电学性能的研究  

High Pressure Synthesis and Electrical Properties of Ag_(1-x)Pb_(18)SbTe_(20)

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

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重点实验室培育基地,河南焦作454003 [2]上海出入境检验检疫局,上海200135 [3]吉林大学超硬材料国家重点实验室,吉林长春130012

出　　处：《高压物理学报》2015年第3期219-222,共4页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(51001042;11204067);河南理工大学青年骨干教师资助计划;河南省高校基本科研业务费专项资金(NSFRF140202);河南理工大学青年基金(Q2012-48);河南省高校科技创新团队支持计划(2012IRTSTHN007);河南省教育厅科学技术研究重点项目(14B140006)

摘　　要：采用高压方法制备了Ag偏离化学计量比的Ag1-xPb18SbTe20(x=0,0.3,0.6)样品,研究了Ag含量及温度对样品电学输运性能的影响。X射线衍射测试结果表明,样品具有单相NaCl结构,晶格常数随Ag含量的减少而变小。电学输运性能测试表明:与常规制备方法相比,高压方法制备的AgPb18SbTe20样品的电导率较高;样品电导率随x的增大而逐渐增大,x=0.6时,室温条件下的样品电导率高达1 598.4S/cm。随着温度的升高,Seebeck系数增大,电导率减小。300℃时,Ag0.4Pb18SbTe20样品的功率因子达到最大值,约为1.97mW/(m·K2)。Thermoelectric materials Ag1-xPb18SbTe20(x=0,0.3,0.6)were synthesized by high pressure method.The composition dependent electrical properties were studied from room temperature to500℃.The result of X-ray diffraction indicates that Ag1-xPb18SbTe20 samples have the structure of NaCl crystal.As Ag content decreases,the lattice constant decreases.The measurement results of electrical properties show that the electrical conductivity of Ag1-xPb18SbTe20 samples synthesized by high pressure is much higher than that of other preparing methods.The electrical conductivity increases with x,and its maximum value reaches 1 598.4S/cm at room temperature for the Ag0.4Pb18SbTe20 sample.As the temperature rises,Seebeck coefficient increases and electrical conductivity decreases.The maximum power factor reaches 1.97mW/(m·K2)at 300℃for the Ag0.4Pb18SbTe20 sample.

关 键 词：高压 电学性能 X射线衍射 SEEBECK系数 

分 类 号：TB34[一般工业技术—材料科学与工程] O611.3[理学—无机化学]