화학공학소재연구정보센터
Journal of Crystal Growth, Vol.209, No.4, 773-778, 2000
Microstructural study of Bi2Te3 material obtained by ultrarapid quenching process route
Bismuth telluride material was fabricated using ultrarapid quenching process route, which is unusual to get polycrystalline materials for thermoelectric applications. The microstructural study showed that the obtained microstructures are very different from those obtained by normal cooling, which should induce new physical properties. The ultrarapid quenched material was obtained in the shape of foils, the thickness of which was found to vary in the range of 10-60 mu m, which corresponds to a cooling rate of about 10(6) K/s. Scanning electron microscopy associated with energy-dispersive spectrometry and X-ray diffraction evidenced a microcrystalline structure of the expected composition with a (0 2 (2) over bar 5) texture. The fine-grained observed microstructure seems promising to improve thermoelectric properties and the texture should induce specific material properties.