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High-pressure synthesis of Silicide Thermoelectric Material

Research Project

Project/Area Number 26420731
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Structural/Functional materials
Research InstitutionOkayama University of Science

Principal Investigator

Yoshihisa Mori  岡山理科大学, 理学部, 教授 (00258211)

Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords高圧合成 / 熱電材料 / シリサイド / 放射光 / 測定技術 / 熱電性能 / シリサイド半導体 / 環境半導体
Outline of Final Research Achievements

High-pressure and high-temperature (HP-HT) synthesis of the Mg2Si thermoelectric material was studied. At first, HP-Ht X-ray diffraction study was carried out to determine the synthetic condition. The material was synthesized under HP-HT condition by using the piston cylinder equipment, and finally by using the Hot-press equipment.
As a result, high quality Mg2Si was synthesized by the multiple sinterings, but the technique is extremely inefficient. In order to improve a reaction rate, fine powder of MgH2 instead of Mg was used. It is possible to grind to fine powder because the MgH2 is stable at atmospheric condition.
By using the MgH2 fine powder, the reaction rate improved rapidly. Moreover it is possible to avoid the oxidation of Mg because the MgH2 releases hydrogen under high temperature. The Seebeck coefficient at high temperature of the compound decreased, and the electrical conductivity at high temperature increased.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (16 results)

All 2017 2016 2015 2014

All Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results,  Open Access: 4 results,  Acknowledgement Compliant: 2 results) Presentation (12 results) (of which Int'l Joint Research: 8 results,  Invited: 2 results)

  • [Journal Article] Development of thermoelectric materials using high-pressure synthesis technique2017

    • Author(s)
      C. Sekine, Y. Mori
    • Journal Title

      Jpn. J. Appl. Phys.

      Volume: 56

    • NAID

      120006529949

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Energetic consideration of compounds at Mg2Si-Ni electrode interlayer produced b2017

    • Author(s)
      Y. Imai, H. Sugawara, Y. Mori, S. Nakamura, A. Yamamoto, K. Takarabe
    • Journal Title

      Jpn. J. Appl. Phys.

      Volume: 56

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Consideration about the synthesis pressure effect on lattice defects of Mg2Si using 1st principle calculations2016

    • Author(s)
      Yoji Imai, Yoshihisa Mori, Shigeyuki Nakamura, Ken-ichi Takarabe
    • Journal Title

      Journal of Alloys and Compounds

      Volume: 664 Pages: 369-377

    • DOI

      10.1016/j.jallcom.2015.09.112

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] マルチアンビル装置とMg2Si熱電材料の高圧合成2016

    • Author(s)
      森嘉久
    • Journal Title

      高圧力の科学と技術

      Volume: 26

    • NAID

      130005416292

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] Solid-phase reaction of Mg2Si under pressure2017

    • Author(s)
      Y. Mori, N. Tamannoi, N. Sugimoto, T. Yoshino
    • Organizer
      EMN Meeting TM2017
    • Place of Presentation
      Hanoi (Vietnam)
    • Year and Date
      2017-03-13
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Synthesis of high purity Mg2Si thermoelectric material by hot-pressing method2017

    • Author(s)
      N. Sugimoto, R. Toubou, N. Tamanoi, S. Matsuda, Y. Mori
    • Organizer
      EMN Meeting TM2017
    • Place of Presentation
      Hanoi (Vietnam)
    • Year and Date
      2017-03-13
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] High pressure synthesis and thermoelectric measurement of Mg2Si2016

    • Author(s)
      Y. Mori
    • Organizer
      HPSP17 & WHS
    • Place of Presentation
      Tokyo (Japan)
    • Year and Date
      2016-08-07
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] High pressure synthesis of Mg2Si by using MgH22016

    • Author(s)
      N. Tamanoi, N. Sugimoto, Y.Mori, T. Yoshino and K. Takarabe
    • Organizer
      HPSP17 & WHS
    • Place of Presentation
      Tokyo (Japan)
    • Year and Date
      2016-08-07
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Low Cost Fabrication of Mg2Si Thermoelectric Device with Reused-silicon2016

    • Author(s)
      S. Nakamura, A. Sigemune, S. Shiga, Y. Mori, K. Takarabe
    • Organizer
      APAC-Silicide2016
    • Place of Presentation
      Fukuoka (Japan)
    • Year and Date
      2016-07-16
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Structural and thermoelectrical studies on Mg2Si synthesized under pressure2016

    • Author(s)
      Yoshihisa Mori, Yuji Kaihara, Takashi Yoshino, Nobukado Tamanoi, Ken-ichi Takarabe
    • Organizer
      EMN Meeting TM2016
    • Place of Presentation
      Orland, USA
    • Year and Date
      2016-02-21
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] High-pressure X-ray diffraction study of Mg2Si synthesized by using MgH22016

    • Author(s)
      Nobukado Tamanoi, Naoki Sugimoto, yoshihisa Mori, Ken-ichi Takarabe
    • Organizer
      EMN Meeting TM2016
    • Place of Presentation
      Orland, USA
    • Year and Date
      2016-02-21
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Thermoelectric properties of Mg2Si synthesized under pressure2015

    • Author(s)
      Y. Mori, Y. Kaihara, T. Yoshino, S. Nakamura, K. Takarabe
    • Organizer
      AIRAPT-25
    • Place of Presentation
      Madrid, Spain
    • Year and Date
      2015-08-30
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Mg2Siにおける熱電性能の合成圧力依存2014

    • Author(s)
      貝原勇司,谷岡正章,玉ノ井遥廉,森嘉久,芳野極
    • Organizer
      日本高圧力学会
    • Place of Presentation
      徳島
    • Year and Date
      2014-11-22 – 2014-11-24
    • Related Report
      2014 Research-status Report
  • [Presentation] MgH2とSiによるMg2Siの高圧合成2014

    • Author(s)
      谷岡正章,玉ノ井遥廉,貝原勇司,森嘉久
    • Organizer
      日本高圧力学会
    • Place of Presentation
      徳島
    • Year and Date
      2014-11-22 – 2014-11-24
    • Related Report
      2014 Research-status Report
  • [Presentation] Seebeck coefficient of Mg2Si synthesized under pressure.2014

    • Author(s)
      Y. Kaihara, Y. Mori, T. Yoshino, K. Takarabe
    • Organizer
      52nd EHPRG
    • Place of Presentation
      Lyon, France
    • Year and Date
      2014-09-07 – 2014-09-12
    • Related Report
      2014 Research-status Report
  • [Presentation] High-pressure synthesis of Mg2Si thermoelectric material2014

    • Author(s)
      Y. Mori, Y.Kaihara, S.Nakamura, T.Yoshino, K. Takarabe
    • Organizer
      ICSS-Silicide 2014
    • Place of Presentation
      Toyko, Japan
    • Year and Date
      2014-07-19 – 2014-07-21
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2018-03-22  

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