Preparation and transport properties of AgSbTe2 by high-pressure and high-temperature

• Published in: Journal of alloys and compounds Vol. 454; no. 1-2; pp. 415 - 418
• Main Authors: Ma, Hongan, Su, Taichao, Zhu, Pinwen, Guo, Jiangang, Jia, Xiaopeng
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier 24.04.2008
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Conductivity phenomena in semiconductors and insulators; Electronic transport in condensed matter; Exact sciences and technology; Physics; Thermoelectric and thermomagnetic effects; Electrical conductivity; Material processing; Seebeck effect; XRD; High temperature; High pressure; Thermoelectric materials; Antimony Silver Tellurides Mixed; High-temperature high-pressure; Thermoelectric power; Transport processes; Thermoelectric; AgSbTe2
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2006.12.126

In the paper, ternary thermoelectric material AgSbTe2 was prepared by high-pressure and high-temperature (HPHT) technique. Near single phase AgSbTe2 was obtained using normal stoichiometric powder mixtures which were indexed by powder X-ray diffraction. The dependence of transport properties for AgSbTe2 on synthetic pressure was studied at room temperature. With the increase of synthetic pressure, the electrical resistivity and Seebeck coefficient of AgSbTe2 decrease while the power factor increases, and the maximum value reaches 10.3muWcm-1K-2 at the synthetic pressure of 5.2GPa. The results show that the HPHT offers to a potential processing route to produce single phase ternary thermoelectric material AgSbTe2, which is helpful to improve its thermoelectric properties.