【摘 要】
：
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 subseque
【机 构】
：
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
【出 处】
：
第十七届全国相图学术会议暨相图与材料设计国际研讨会
论文部分内容阅读
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.
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