Effects of Annealing Treatment on Microstructure and Thermoelectric Properties of Ba8Al16Si30

Abstract:

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Clathrate Ba8Al16Si30 was produced by arc melting and annealing effects on the microstructure and thermoelectric properties were investigated. The phase transformation behavior of arc-melted Ba8Al16Si30 was examined by thermogravimetric analysis, differential scanning calorimetry, hardness test, X-ray diffraction and scanning electron microscope analyses. Isothermal annealing was carried out to induce the transformation to a thermoelectric phase at 500°C to 700°C for 5 hrs. Thermoelectric properties in the temperature range between 300K and 600K were measured and evaluated. Electrical conductivity was decreased and Seebeck coefficient was increased with increasing isothermal annealing temperature. The arc-melted and the isothermal annealed specimens represented n-type conduction at temperatures examined, and they showed reliable thermoelectric behaviors.

Info:

Periodical:

Solid State Phenomena (Volume 118)

Edited by:

Jang Hyun Sung, Chan Gyu Lee, Yong Zoo You, Young Kook Lee and Jae Young Kim

Pages:

561-564

DOI:

10.4028/www.scientific.net/SSP.118.561

Citation:

J. I. Lee et al., "Effects of Annealing Treatment on Microstructure and Thermoelectric Properties of Ba8Al16Si30 ", Solid State Phenomena, Vol. 118, pp. 561-564, 2006

Online since:

December 2006

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Price:

$35.00

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