Thermoelectric properties of n-type (Bi2Se3)x(Bi2Te3)1-x prepared by bulk mechanical alloying and hot pressing

J. Y. Yang, T. Aizawa, A. Yamamoto, T. Ohta

研究成果査読

145 被引用数 (Scopus)

抄録

Starting from element Bi, Se and Te granules, n-type (Bi2Se3)x(Bi2Te3)1-x with different chemical composition (x = 0.025, 0.05, 0.075, 0.10 and 0.15) were prepared via bulk mechanical alloying (BMA) and hot pressing (HP). Effects of chemical composition, doping content and annealing on thermoelectric properties were reported. The range x≤0.050 is more favorable than other chemical compositions for the thermoelectric properties of BMAed (Bi2Se3)x(Bi2Te3)1-x. When doping with SbI3, both the electrical resistivity and the Seebeck coefficient of (Bi2Se3)0.05(Bi2Te3)0.95 decrease, thus resulting in no improvement of the figure of merit. On the other hand, annealing the as-HPed (Bi2Se3)0.05(Bi2Te3)0.95 a sufficiently long time is helpful to improve thermoelectric properties, and the maximum figure of merit of (Bi2Se3)0.05(Bi2Te3)0.95 is 2.31×10-3 /K.

本文言語English
ページ(範囲)326-330
ページ数5
ジャーナルJournal of Alloys and Compounds
312
1-2
DOI
出版ステータスPublished - 2000 11 16

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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「Thermoelectric properties of n-type (Bi<sub>2</sub>Se<sub>3</sub>)<sub>x</sub>(Bi<sub>2</sub>Te<sub>3</sub>)<sub>1-x</sub> prepared by bulk mechanical alloying and hot pressing」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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