著者

大杉 功 加藤 雅彦 米田 征司

出版者

サレジオ工業高等専門学校

雑誌

サレジオ工業高等専門学校研究紀要 (ISSN:18812538)

巻号頁・発行日

vol.35, pp.73-76, 2009

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Experiment was made on temperature dependence of the crystal structure of bismuth telluride, which has recently been investigated as a thermoelectric energy conversion material as well as an electronic cooling material. The crystal lattice parameters estimated from the powder X-ray diffraction profiles increasedmonotonously at low temperatures below 350 °C, while they abruptly changed and some other profiles than those of the telluride appeared at 400°C. The result of this experiment suggested that the crystal lattice is normally expanded at low temperatures below 350°C, while it is abruptly changed by dissociation andsublimation of the elements and some other substances such as oxides are composed at 400°C.