Sn-Sb-Te三元合金相图200℃等温截面  

Isothermal Section of Sn-Sb-Te Ternary System at 200℃

作　　者：徐飞飞[1] 张凡[1] 袁驰文 王戎丞[1] 陈红梅[1] 欧阳义芳[1] 陶小马[1] 

机构地区：[1]广西大学物理科学与工程技术学院,广西南宁530004

出　　处：《广西科学》2017年第4期361-365,共5页Guangxi Sciences

基　　金：国家自然科学基金项目(51201039;11464001;51661003);广西自然科学基金项目(2014GXNSFAA118308)资助

摘　　要：【目的】获得在SnTe基热电材料中掺杂Sb后的相关系。【方法】采用X-ray Diffraction Analysis(XRD)、Scanning Electron Microscope(SEM)及Energy-Dispersive X-ray Spectroscopy(EDS)对合金样品进行测试,绘制Sn-Sb-Te三元系图200℃等温截面并进行相关系分析。【结果】Sn-Sb-Te三元体系200℃等温截面由3个单相区、5个两相区和5个三相区组成。其中,5个三相区分别是Sb_2Te_3+Te+SnSb_2Te_4、SbTe+SnSb_2Te_4+Sb_2Te_3、SnTe+δ-Sb_2Te+Sb、SnTe+SnSb+Sb和SnTe+SnSb+Sn。200℃时,Sb元素在SnTe相中的固溶度为3.57at.%;此外,在200℃下Sn-Sb-Te三元系中出现文献报道的SnSb_2Te_4三元相。【结论】通过合金法测定了Sn-Sb-Te三元合金相图在200℃的相平衡关系,为进一步开发SbTe基热电材料提供有益参考。【Objective】In order to obtain the correlation after doping Sb in the thermoelectric conversion materials of the matrix SnTe.【Methods】The isothermal section of the Sn-Sb-Te ternary system at 200℃ was determined and analysized.The alloy samples were investigated by X-ray diffraction analysis（XRD）,scanning electron microscope（SEM）and energy-dispersive X-ray spectroscopy（EDS）techniques.【Results】The results show that the isothermal section of the Sn-Sb-Te system at 200℃is composed of three single phase regions,five two phase regions and five three phase regions.Where,the five three phase regions are Sb2Te3＋Te＋SnSb2Te4,SbTe＋SnSb2Te4＋Sb2Te3,SnTe＋δ-Sb2Te＋Sb,SnTe＋SnSb＋Sb,SnTe＋SnSb＋Sn,respectively.The solubility of Sb in SnTe phase is 3.57 at.% at 200℃.Moreover,the SnSb2Te4 ternary compound reported in the literature appeared in Sn-Sb-Te ternary system at 200℃.【Conclusion】The isothermal section of Sn-Sb-Te has been determined at 200℃ by using alloy melting meth-od,which can provide a useful reference for further development of the SbTe-based thermoelectric materials.

关 键 词：Sn-Sb-Te 合金相图 等温截面 

分 类 号：TG14[一般工业技术—材料科学与工程]