Effect of Na-doping on thermoelectric performance of PbTe0.5Se0.5 and Pb0.96Mg0.04Te0.5Se0.5
(0) Two series alloys Pb1-xNaxTe0.5Se0.5 (x =0.01, 0.02, 0.04) and Pb0.96-yNayMg0.04Te0.5Se0.5 (y =0.005, 0.01, 0.02, 0.03, 0.04 and 0.06) series alloy were prepared by high frequency melting and subsequent spark plasma sintering.X-ray powder diffraction results showed that all alloy samples of Pb1-xNaxTe0.5Se0.5 were consisted of PbTe phase and tiny Te phase.The existence of Mg promoted the solubility of Na in PbTe0.5Se0.5.The solid solubility of Na in PbTe0.5Se0.5 increased from about 2% to more than 6 %.The electrical resistivity and Seebeck coefficient of Pb0.96-yNayMg0.04Te0.5Se0.5 samples decreased with the rising Na content.A high ZT value of 1.15 was obtained in the sample of Pb0.90Na0.06Mg0.04Te0.5Se0.5 at 673 K.
Thermoelectric performance PbTe,Na-doping,solid solubility
陈宗朋 伍飞霞 逯正旺 李均钦 刘福生
深圳大学材料学院,深圳市特种功能材料重点实验室,深圳,518060
国内会议
桂林
英文
257-260
2015-11-03（万方平台首次上网日期，不代表论文的发表时间）