Microstructures and Thermoelectric Properties of (Bi2Te3)1-X/(CdTe)x Composites
| Periodical | Solid State Phenomena (Volume 170) |
|---|---|
| Main Theme | Solid Compounds of Transition Elements |
| Edited by | J.-L. Bobet, B. Chevalier and D. Fruchart |
| Pages | 41-46 |
| DOI | 10.4028/www.scientific.net/SSP.170.41 |
| Citation | Horng Jyh Gao et al., 2011, Solid State Phenomena, 170, 41 |
| Online since | April, 2011 |
| Authors | Horng Jyh Gao, Wu Ruei Huang, Ching Cherng Wu, Yung Kang Kuo, Ching Hwa Ho |
| Keywords | (Bi2Te3)1-x/(CdTe)x, Thermoelectric Material, Two-Component Composites |
| Price | US$ 28,- |
In this study, Bi2Te3 was selected as a matrix material and an immiscible semiconductor material CdTe with a wider energy band gap was precipitated to form microstructures in it. For this purpose, a series of two-component composites (Bi2Te3)1-x/(CdTe)x, with x = 0.01, 0.05, 0.1, 0.15, 0.2 were prepared by melting, high speed rocking and quenching technique. The composition and microstructure of these two-component composites were examined by X-ray and SEM. Thermoelectric properties including Seebeck coefficient, electric resistivity, and thermal conductivity were measured from 30 K to 400 K. The compositional and temperature dependence of the microstructure and thermoelectric properties of (Bi2Te3)1-x/(CdTe)x composites were discussed. It is found that (Bi2Te3)0.99/(CdTe)0.01 exhibits a better thermoelectric performance than that of Bi2Te3 at elevated temperatures. The figure of merit (ZT) of (Bi2Te3)0.99/(CdTe)0.01 is about 0.64 at 400 K.
