Thermoelectric properties of nonstoichiometric Ag1－xPb18SbTe20 materials
Year: 2007
Type: article
Abstract: Ag1-xPb18SbTe20(x＝0，0.25，0.5，0.75) samples were prepared by melt-quench-spark plasma sintering(SPS). As the Ag content decreased, a second phase Sb2Te3 occurred in samples and the carrier concentration increased to 5×1018cm-3 and then ceased to increase as Ag content decreased further. The carrier mobility decreased first, and then increased, as the Ag content decreased. As temperature increased, the carrier scattering mechanism shifted gradually from ionized impurity scattering to acoustic phonon scattering. As the Ag content decreased, the electric conductivity increased while the Seebeck coefficient decreased, and the thermal conductivity show an increasing trend.
Source: Acta Physica Sinica
DOI: 10.7498/aps.56.3473
Authors: Yan Yong-Gao, Tang Xin-Feng, Liu Hai-Jun, Yin Ling-Ling, Zhang Qing-Jie, 武汉理工大学材料复合新技术国家重点实验室，武汉 430070
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W2336984948