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2009 Fiscal Year Final Research Report

Development of liquid-phase growth process for Bi_2Te_3-based Thermoelectric Materials

Research Project

  • PDF
Project/Area Number 20760494
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Material processing/treatments
Research InstitutionShimane University

Principal Investigator

KITAGAWA Hiroyuki  Shimane University, 総合理工学部, 准教授 (00325044)

Project Period (FY) 2008 – 2009
Keywords熱電変換材料 / 液相成長法 / キャリア輸送特性
Research Abstract

A liquid-phase growth process of Bi_2Te_3-based materials was developed in order to obtain polycrystals with a preferred orientation for use in thermoelectric applications. The liquid-phase growth was carried out under an argon atmosphere by using the sliding-boat method, which is an easy and short-time process compared with the conventional method for preparing the single crystals. X-ray diffraction patterns show that the hexagonal c-plane of the grown crystal is almost parallel to the substrate. The Hall mobility of the grown crystal (p-type Bi_<0.5>Sb_<1.5>Te_3) was 1.8~2 times larger than that of the sintered materials with a comparable carrier concentration. As a result, the thermoelectric power factor was improved by this process because of the low electrical resistivity due to the high carrier mobility.

  • Research Products

    (4 results)

All 2010 2009

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (3 results)

  • [Journal Article] Structure and Carrier Transport Properties of Hot-press Deformed Bi0. 5Sb1. 5Te32010

    • Author(s)
      Hiroyuki Kitagawa, Akira Kurata, Hiroshi Araki, Shigekazu Morito, Eishi Tanabe
    • Journal Title

      Physica Status Solidi A 207

      Pages: 401-406

    • Peer Reviewed
  • [Presentation] スライドボート法により作製したBi0. 5Sb1. 5Te3の熱電特性2010

    • Author(s)
      北川裕之, 森広永喜, 山田容士, 久保衆伍
    • Organizer
      日本金属学会2010年度春期大会
    • Place of Presentation
      筑波大学
    • Year and Date
      2010-03-30
  • [Presentation] Texture and thermoelectric properties of Bi0. 5Sb1. 5Te3 prepared by hot-press deformation2009

    • Author(s)
      Hiroyuki Kitagawa, Akira Kurata, Hiroshi Araki, Shigekazu Morito, Eishi Tanabe
    • Organizer
      The 28th International Conference on Thermoelectrics
    • Place of Presentation
      Freiburg, Germany
    • Year and Date
      2009-07-27
  • [Presentation] スライドボート法によるBi2Te3系熱電材料の液相成長2009

    • Author(s)
      北川裕之, 谷口大祐, 國貞俊光, 山田容士, 久保衆伍
    • Organizer
      日本金属学会2009年度春期大会
    • Place of Presentation
      東京工業大学
    • Year and Date
      2009-03-29

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Published: 2011-06-18   Modified: 2016-04-21  

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