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Thermoelectric properties of natural superlattice crystals with low dimensional electric conduction layers

Research Project

Project/Area Number 21360337
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Structural/Functional materials
Research InstitutionKobe University (2010-2011)
Kyoto University (2009)

Principal Investigator

TANAKA Katsushi  神戸大学, 大学院・工学研究科, 教授 (30236575)

Co-Investigator(Kenkyū-buntansha) 岡本 範彦  京都大学, 工学研究科, 助教 (60505692)
Project Period (FY) 2009 – 2011
Project Status Completed (Fiscal Year 2011)
Budget Amount *help
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2011: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2010: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2009: ¥11,440,000 (Direct Cost: ¥8,800,000、Indirect Cost: ¥2,640,000)
Keywords不定比化合物 / マグネリ相 / シアー構造 / 低次元電導体 / 熱電材料 / 熱電変換材料 / 量子井戸 / 低次元化合物
Research Abstract

In this study, we demonstrate the efficiency as thermoelectric materials of off-stoichiometric oxide semiconductor in terms of electric and thermal conductivity. We succeed to obtain the value of dimensionless figure of merit to be 0. 3 in off-stoichiometric titanium oxide, that is quite large for ubiquitous oxides. The large value is due to a strong phonon scattering at crystallographic shear structure which is largely introduced by a thermal treatment.

Report

(4 results)
  • 2011 Annual Research Report   Final Research Report ( PDF )
  • 2010 Annual Research Report
  • 2009 Annual Research Report
  • Research Products

    (11 results)

All 2012 2011 2010 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (4 results) Remarks (2 results)

  • [Journal Article] Direct Observation of Vacancies and Local Thermal Vibration in Thermoelectric Rhenium Silicide2012

    • Author(s)
      S.Harada, K.Tanaka, K.Kishida, N.L Okamoto, N.Endo, E.Okunishi, H.Inui
    • Journal Title

      Applied Physics Express

      Volume: 5 Issue: 3 Pages: 35203-35203

    • DOI

      10.1143/apex.5.035203

    • NAID

      10030511442

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Crystal structure refinement of ReSi1. 75 with an ordered arrangement of silicon vacancies2011

    • Author(s)
      S. Harada, H. Hoshikawaa, K. Kuwabaraa, K. Tanaka, E. Okunishi and H. Inui
    • Journal Title

      Phil. Mag

      Volume: Vol.91, No.23 Pages: 3108-3127

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Crystal Structure Refinement of ReSi1.75 with an Ordered Arrangement of Silicon Vacancies2011

    • Author(s)
      S.Harada, H.Hoshikawa, K.Kuwabara, K.Tananaka, E.Okunishi, H.Inui
    • Journal Title

      Philosophical Magazine

      Volume: 91 Issue: 23 Pages: 3108-3127

    • DOI

      10.1080/14786435.2011.570278

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Thermoelectric properties and crystallographic shear structures in titanium oxides of the Magneli phases2010

    • Author(s)
      S. Harada, K. Tanaka and H. Inui
    • Journal Title

      J. Appl. Phys

      Volume: Vol.108, No.8 Pages: 83703-83703

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Thermoelectric properties and crystallographic shear structures in titanium oxides of the Magneli phases2010

    • Author(s)
      S.Harada, K.Tanaka, H.Inui
    • Journal Title

      J.Appl.Phys

      Volume: 108 Pages: 83703-83703

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Presentation] 第三元素を添加したマグネリ相酸化チタンの熱電特性2010

    • Author(s)
      原田俊太, 田中克志, 乾晴行
    • Organizer
      日本金属学会2010年秋期大会
    • Place of Presentation
      北海道大学
    • Year and Date
      2010-09-27
    • Related Report
      2010 Annual Research Report
  • [Presentation] シアー構造を有する Magneli 化合物の構造変化と熱電特性2010

    • Author(s)
      原田俊太, 田中克志, 乾晴行
    • Organizer
      日本金属学会2010年春期大会
    • Place of Presentation
      筑波大学
    • Year and Date
      2010-03-29
    • Related Report
      2009 Annual Research Report
  • [Presentation] シアー構造を有するMagneli相化合物の構造変化と熱電特性

    • Author(s)
      原田俊太, 田中克志, 乾晴行
    • Organizer
      2010年日本金属学会春期大会
    • Related Report
      2011 Final Research Report
  • [Presentation] 第三元素を添加したマグネリ相酸化チタンの熱電特性

    • Author(s)
      原田俊太, 田中克志, 乾晴行
    • Organizer
      2010年日本金属学会秋期大会
    • Related Report
      2011 Final Research Report
  • [Remarks]

    • URL

      http://mm4.scitec.kobe-u.ac.jp/

    • Related Report
      2011 Final Research Report
  • [Remarks]

    • URL

      http://imc.mtl.kyoto-u.ac.jp/research.html

    • Related Report
      2009 Annual Research Report

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Published: 2009-04-01   Modified: 2016-04-21  

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