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Conduction mechanism and thermoelectric properties of new boron carbide nanowires as a novel thermoelectric material

Research Project

Project/Area Number 25286028
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypePartial Multi-year Fund
Section一般
Research Field Nanomaterials engineering
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Kirihara Kazuhiro  国立研究開発法人産業技術総合研究所, ナノ材料研究部門, 主任研究員 (70392610)

Co-Investigator(Kenkyū-buntansha) 向田 雅一  国立研究開発法人産業技術総合研究所, ナノ材料研究部門, 主任研究員 (70358141)
Co-Investigator(Renkei-kenkyūsha) SHIMIZU Yoshiki  産業技術総合研究所, ナノ材料研究部門, 研究グループ長 (20371049)
Project Period (FY) 2013-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000)
Fiscal Year 2016: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2015: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2013: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Keywordsナノ材料 / 熱電変換 / ナノ物性計測 / 炭化ホウ素
Outline of Final Research Achievements

Boron carbide is a promising candidate of thermoelectric (TE) materials which generate electric power from the enormous amount of unused waste heat. In this research, we successfully synthesized boron carbide nanowires (BCNWs) and measured their electrical transport and thermoelectric properties. We found that the BCNW achieved a higher Seebeck coefficient and power factor than those of the bulk sample. The conduction mechanism of the BCNWs at low temperatures below 300 K is different from that of the bulk sample. At around 300 K, there is a crossover temperature between electrical conduction by variable-range hopping and phonon-assisted hopping. The inhomogeneous carbon concentration and planar defects are thought to modify the bonding nature and electronic structure of the BCNW. A lightweight and high-strength TE module by using the BCNWs that possess higher TE performance than the bulk materials can be expected.

Report

(5 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Annual Research Report
  • 2014 Annual Research Report
  • 2013 Annual Research Report
  • Research Products

    (7 results)

All 2017 2015 2014 2013

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Acknowledgement Compliant: 1 results) Presentation (6 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Electrical transport and thermoelectric properties of boron carbide nanowires2017

    • Author(s)
      Kazuhiro Kirihara, Masakazu Mukaida and Yoshiki Shimizu
    • Journal Title

      Nanotechnology

      Volume: 28 Issue: 14 Pages: 145404-145404

    • DOI

      10.1088/1361-6528/aa610c

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] 炭化ホウ素ナノワイヤにおけるホッピング伝導と熱電物性2017

    • Author(s)
      桐原 和大、向田 雅一、清水 禎樹
    • Organizer
      日本物理学会第72回年次大会
    • Place of Presentation
      大阪大学(大阪府豊中市)
    • Year and Date
      2017-03-19
    • Related Report
      2016 Annual Research Report
  • [Presentation] Electrical and Thermoelectric Properties of Boron-based Nanobelts and Nanowires2015

    • Author(s)
      桐原和大
    • Organizer
      Materials Science & Thechnology 2015
    • Place of Presentation
      Greater Columbus Convention Center(Ohio, USA)
    • Year and Date
      2015-10-07
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ボロンカーバイドナノワイヤの構造と熱電特性2015

    • Author(s)
      桐原和大、向田雅一、清水禎樹
    • Organizer
      第62回応用物理学会春季学術講演会
    • Place of Presentation
      東海大学 湘南キャンパス(平塚市)
    • Year and Date
      2015-03-12
    • Related Report
      2014 Annual Research Report
  • [Presentation] Thermoelectric Properties of Boron Carbide Nanowires2014

    • Author(s)
      桐原和大、向田雅一、清水禎樹
    • Organizer
      The 18th International Symposium on Boron, Borides, and Related Materials
    • Place of Presentation
      Hawaii Prince Hotel (Hawaii, USA)
    • Year and Date
      2014-09-01
    • Related Report
      2014 Annual Research Report
  • [Presentation] ボロンカーバイドナノワイヤの熱電特性2014

    • Author(s)
      桐原和大、向田雅一、清水禎樹
    • Organizer
      第61回応用物理学会春季学術講演会
    • Place of Presentation
      青山学院大学(相模原市)
    • Related Report
      2013 Annual Research Report
  • [Presentation] Thermoelectric Properties of Boron Carbide Nanowires2013

    • Author(s)
      桐原和大、清水禎樹
    • Organizer
      第32回熱電変換国際会議 (ICT2013)
    • Place of Presentation
      神戸国際会議場(神戸市)
    • Related Report
      2013 Annual Research Report

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Published: 2013-05-21   Modified: 2019-07-29  

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