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http://dx.doi.org/10.5695/JKISE.2017.50.2.114

Spherical Bi2Te3 Powder Synthesized by Oxide-Reduction Process via Ultrasonic Spray Pyrolysis  

Song, Chul-Han (Advanced Materials & Processing Center, Institute for Advanced Engineering (IAE))
Jang, Dae-Hwan (Advanced Materials & Processing Center, Institute for Advanced Engineering (IAE))
Jin, Yun-Ho (Advanced Materials & Processing Center, Institute for Advanced Engineering (IAE))
Kong, Man-Sik (Advanced Materials & Processing Center, Institute for Advanced Engineering (IAE))
Publication Information
Journal of the Korean institute of surface engineering / v.50, no.2, 2017 , pp. 114-118 More about this Journal
Abstract
Bismuth telluride ($Bi_2Te_3$) and its alloys are well-known thermoelectric materials for ambient temperature applications. In this study, the dissolved Bi-Te precursor solution was used to synthesis metallic $Bi_2Te_3$ powder via ultrasonic spray pyrolysis and reduction process. The droplets of the Bi-Te precursor solution were decomposed to Bi-Te oxide powders by ultrasonic spray pyrolysis. The spherical $Bi_2Te_3$ powders were synthesized by reduction reaction in atmosphere of hydrogen gas at the temperature above $375^{\circ}C$ for 6h. The reduced $Bi_2Te_3$ powders have a mean particle size of $1.5{\mu}m$. The crystal structure of the powder was evaluated by X-Ray diffraction(XRD), and the microstructure with size and shape powders was observed by fieldemission scanning electron microscope(FE-SEM) and transmission electron microscope(TEM).
Keywords
Ultrasonic Spray Pyrolysis; Thermoelectric materials; Bismuth telluride; Spherical; Reduction;
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Times Cited By KSCI : 7  (Citation Analysis)
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