HPHT synthesis and electrical properties of AgSbTe₂–Ag₂Te thermoelectric alloys

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• 作者：Taichao Su ; Xiaopeng Jia ; Hongan Ma ; Chuanyi Zang ; Lin Zhou ; Jiangang Guo ; Nan Dong
• 关键词：Electrical properties ; HPHT ; AgSbTe₂ ; Ag₂Te ; X-ray techniques
• 刊名：Materials Letters
• 出版年：2008
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：30 June 2008
• 卷：62
• 期：17-18
• 页码：3269-3271
• 文件大小：162 K

摘要

In this letter, p-type pseudo-binary AgSbTe₂–Ag₂Te thermoelectric alloys with the composition of (AgSbTe₂)_{1 − x}(Ag₂Te)_x (x = 0~0.2) were prepared by high pressure and high temperature (HPHT) method. The samples are near single phase AgSbTe₂ with a small quantity of impurities including Sb₂Te₃ and Ag₂Te. The electrical properties including the Seebeck coefficient and the electrical resistivity depending on synthetic pressure and the Ag₂Te content x were studied at room temperature. The measurement results show that the Seebeck coefficient and the electrical resistivity for (AgSbTe₂)_{1 − x}(Ag₂Te)_x decrease with an increase of the synthetic pressure and x which indicate that high pressure combining alloying with Ag₂Te could modulate the electrical properties of Ag–Sb–Te system effectively.