Thermoelectric Properties of xPbTe/Yb0.2Co4Sb12 Hot-Pressed Samples

Autor:	Hong Quan Liu, Qiu Sun, Gang Zhou, Xin Bing Zhao, Yi Jie Gu
Rok vydání:	2011
Předmět:	Thermal conductivity Materials science Polymers and Plastics Electrical resistivity and conductivity Phase (matter) Seebeck coefficient Thermoelectric effect Composite number Materials Chemistry Analytical chemistry Absolute value Thermoelectric materials
Zdroj:	Journal of Inorganic and Organometallic Polymers and Materials. 21:858-861
ISSN:	1574-1451 1574-1443
DOI:	10.1007/s10904-011-9583-6
Popis:	The xPbTe/Yb0.2Co4Sb12 compounds were prepared by the ball-milling and hot-pressed process. Electrical conductivity of the composite samples are reduced with a increase in PbTe content; and, their temperature dependence coefficients show the positive values. The maximum electrical conductivity of composite materials is ~80000 Sm−1 at 800 K. The Seebeck coefficient (absolute value) of the composite material is obviously improved with an increase in the dispersed phase (PbTe) content; the Seebeck coefficient (absolute value) of the 10PbTe sample is ~260 μVK−1 at 700 K, which increases by 13.6% relative to that of the Yb0.2Co4Sb12 sample. The thermal conductivity of the composite samples is improved due to introduction of PbTe, and the thermal conductivity of the 10PbTe sample is ~3 Wm−1 K−1 at 550 K. The maximum value of ZT is 0.78 at 700 K for the 2.5PbTe sample.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::34d5d160801a991b3560fd506a6d420d https://doi.org/10.1007/s10904-011-9583-6 Zobrazit plný text záznamu Full text from SpringerLink