Nano Archive

Solvothermal synthesis and thermoelectric properties of lanthanum contained Bi-Te and Bi-Se-Te alloys

Ji, X. H. and Zhao, X. B. and Zhang, Y. H. and Lu, B. H. and Ni, H. L. (2005) Solvothermal synthesis and thermoelectric properties of lanthanum contained Bi-Te and Bi-Se-Te alloys. Materials Letters, 59 (6). 682 - 685.

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Official URL: http://www.sciencedirect.com/science/article/B6TX9...

Abstract

Novel nano-sized lanthanum contained Bi2Te3 and Bi2Se0.3Te2.7 powders have been synthesized in ethanol at 150 °C for 24 h via solvothermal processes. It was found that alloying of lanthanum in both Bi2Te3 and Bi2Se0.3Te2.7 does not change their crystal structures. The maximal dimensionless figure of merit measured is about 0.11 for La–Bi2Se0.3Te2.7 at 450 K. However, the very low thermal conductivity of 0.4–0.5 W (m K)−1 and the moderate Seebeck coefficient of about 170 μV K−1 indicate the potential to improve the thermoelectric properties of the material by doping optimization.

Item Type:Article
Uncontrolled Keywords:Solvothermal synthesis; Bismuth telluride; Lanthanum; Thermoelectric property; Thermal conductivity
Subjects:Material Science > Nanofabrication processes and tools
Material Science > Nanochemistry
Material Science > Nanostructured materials
ID Code:6861
Deposited By:SPI
Deposited On:25 Sep 2009 16:49
Last Modified:25 Sep 2009 16:49

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