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Oxide thermoelectric materials with built-in bulk nanoheterostructures

Research Project

Project/Area Number 26289242
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypePartial Multi-year Fund
Section一般
Research Field Inorganic materials/Physical properties
Research InstitutionKyushu University

Principal Investigator

Ohtaki Michitaka  九州大学, 総合理工学研究科(研究院), 教授 (50223847)

Co-Investigator(Kenkyū-buntansha) 渡邊 厚介  九州大学, エネルギー基盤技術国際教育研究センター, 助教 (40617007)
Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥16,510,000 (Direct Cost: ¥12,700,000、Indirect Cost: ¥3,810,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2015: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2014: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
Keywordsナノ微細構造 / ヘテロ界面 / 酸化亜鉛 / 酸化物熱電変換材料 / 共ドープ / フォノン散乱 / 熱伝導率 / ナノ粒子 / 複合ドープ / 微細構造 / 熱電変換材料 / 第二相 / 細孔 / 機能性セラミックス材料 / ナノ構造制御 / 粒界制御 / 複合構造 / 異方性 / 熱サイクル
Outline of Final Research Achievements

Nano-heterostructured ZnO ceramics were prepared by multinary doping and dispersion of metallic nanoparticles into the bulk oxide samples. Significantly different nanostructures with also different scattering mechanisms were obtained with different dopants, suggesting an enhancement of multiple scattering mechanisms might be possible by carefully selecting a combination of dopants. Dispersion of metallic nanoparticles such as Au and Ag were also enabled us to enhance the electrical conductivity and to reduce the thermal conductivity simultaneously. Nanoheterostructures are thereby strongly suggested to be promising to further improve the thermoelectric performance of oxide-based thermoelectric materials.

Report

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

    (51 results)

All 2017 2016 2015 2014

All Journal Article (9 results) (of which Peer Reviewed: 1 results) Presentation (39 results) (of which Int'l Joint Research: 22 results,  Invited: 12 results) Book (2 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Synthesis and thermoelectric properties of nanoporous oxide composites containing metal nanoparticles2016

    • Author(s)
      Shinji Hirata, Michitaka Ohtaki
    • Journal Title

      Proceedings of the 18th Cross Straits Symposium on Energy and Environmental Sciences and Technology

      Volume: 18 Pages: 35-36

    • Related Report
      2016 Annual Research Report
  • [Journal Article] Synthesis and thermoelectric properties of layered oxyselenides and oxyphosphides2016

    • Author(s)
      Takuya Kagawa, Michitaka Ohtaki
    • Journal Title

      Proceedings of the 18th Cross Straits Symposium on Energy and Environmental Sciences and Technology

      Volume: 18 Pages: 269-270

    • Related Report
      2016 Annual Research Report
  • [Journal Article] Effects of microstructure on thermoelectric properties of dually doped ZnO2015

    • Author(s)
      Toshifumi Ogawa, Michitaka Ohtaki
    • Journal Title

      Proceedings of the 17th Cross Straits Symposium on Energy and Environmental Science and Technology

      Volume: 17 Pages: 97-98

    • Related Report
      2015 Annual Research Report
  • [Journal Article] Switching the thermal conductivity by phase transitions in metal oxides2015

    • Author(s)
      Kei Watanabe, Michitaka Ohtaki
    • Journal Title

      Proceedings of the 17th Cross Straits Symposium on Energy and Environmental Science and Technology

      Volume: 17 Pages: 105-106

    • Related Report
      2015 Annual Research Report
  • [Journal Article] Synthesis and thermoelectrics proreties of nanoporous oxide formed by selective leaching of metal nanoparticles2015

    • Author(s)
      Shinji Hirata, Michitaka Ohtaki
    • Journal Title

      Proceedings of the 17th Cross Straits Symposium on Energy and Environmental Science and Technology

      Volume: 17 Pages: 111-112

    • Related Report
      2015 Annual Research Report
  • [Journal Article] Thermoelectric properties of ferroelectric oxides reduced by hydrogen2015

    • Author(s)
      Yoshinao Kai, Michitaka Ohtaki
    • Journal Title

      Proceedings of the 17th Cross Straits Symposium on Energy and Environmental Science and Technology

      Volume: 17 Pages: 121-122

    • Related Report
      2015 Annual Research Report
  • [Journal Article] sEffects of morphology on the thermoelectric properties of Al-doped ZnO2014

    • Author(s)
      Li Han, Ngo Van Nong, Wei Zhan, Le Thanh Hung, Tim Holgate, Kazunari Tashiro, Michitaka Ohtaki, Nini Pryds, Søren Linderoth
    • Journal Title

      RSC Advances

      Volume: 4 Issue: 24 Pages: 12353-12361

    • DOI

      10.1039/c3ra47617k

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Oxide Thermoelectric Materials for Power Generation from Mid-to-High Temperature Unused Heat Energy2014

    • Author(s)
      Michitaka Ohtaki
    • Journal Title

      Proceedings of the 16th Cross Straits Symposium on Energy and Environmental Science and Technology

      Volume: 1 Pages: 29-32

    • Related Report
      2014 Annual Research Report
  • [Journal Article] Performance Stability of ZnO-based Oxide Thermoelectric Materials at High Temperature2014

    • Author(s)
      Taiga Kuragaki, Michitaka Ohtaki
    • Journal Title

      Proceedings of the 16th Cross Straits Symposium on Energy and Environmental Science and Technology

      Volume: 1 Pages: 181-182

    • Related Report
      2014 Annual Research Report
  • [Presentation] Nanostructure and Phonon Engineering in Oxide Thermoelectric Materials2017

    • Author(s)
      Michitaka Ohtaki
    • Organizer
      TMS 2017 146th Annual Meeting and Exhibition
    • Place of Presentation
      San Diego, USA
    • Year and Date
      2017-02-26
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Thermoelectric Properties of ZnO with Au Nanoparticles Dispersed therein2017

    • Author(s)
      Kosuke Watanabe, Kazuki Mine, Koichiro Suekuni, Michitaka Ohtaki
    • Organizer
      The 18th International Symposium on Eco-materials Processing and Design
    • Place of Presentation
      Okinawa, Japan
    • Year and Date
      2017-02-17
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Synthesis and thermoelectric properties of nanoporous oxide composites containing metal nanoparticles2016

    • Author(s)
      Shinji Hirata, Michitaka Ohtaki
    • Organizer
      The 18th Cross Straits Symposium on Energy and Environmental Sciences and Technology
    • Place of Presentation
      Shanghai, China
    • Year and Date
      2016-12-04
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Synthesis and thermoelectric properties of layered oxyselenides and oxyphosphides2016

    • Author(s)
      Takuya Kagawa, Michitaka Ohtaki
    • Organizer
      The 18th Cross Straits Symposium on Energy and Environmental Sciences and Technology
    • Place of Presentation
      Shanghai, China
    • Year and Date
      2016-12-04
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Thermal Conductivity Reduction in Oxides for Thermoelectric Energy Conversion2016

    • Author(s)
      Michitaka Ohtaki
    • Organizer
      The 33rd International Korea-Japan Seminar on Ceramics
    • Place of Presentation
      Daejeon, Korea
    • Year and Date
      2016-11-16
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Oxide Thermoelectric Materials for Waste Heat Energy Recuperation2016

    • Author(s)
      Michitaka Ohtaki
    • Organizer
      Global Congress & Expo on Materials Science & Nanoscience
    • Place of Presentation
      Dubai, UAE
    • Year and Date
      2016-10-24
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Oxide Materials for Thermoelectric Energy Conversion2016

    • Author(s)
      Michitaka Ohtaki, Kohei Mizuta, and Toshifumi Ogawa
    • Organizer
      Functional Energy Materials Conference 2016
    • Place of Presentation
      Cavtat, Croatia
    • Year and Date
      2016-09-28
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 酸化物セラミックスの相転移現象に伴う熱伝導率変化2016

    • Author(s)
      渡部啓, 大瀧倫卓, 戸村信雄, 北岡賢治, 篠崎泰夫
    • Organizer
      日本セラミックス協会第29回秋季シンポジウム
    • Place of Presentation
      広島大学
    • Year and Date
      2016-09-07
    • Related Report
      2016 Annual Research Report
  • [Presentation] ZnO焼結体への金属ナノ粒子分散プロセスと熱電特性2016

    • Author(s)
      渡邊厚介, 小川敏史, 大瀧倫卓
    • Organizer
      日本セラミックス協会第29回秋季シンポジウム
    • Place of Presentation
      広島大学
    • Year and Date
      2016-09-07
    • Related Report
      2016 Annual Research Report
  • [Presentation] ZnO-based Oxide Thermoelectric Materials with Microstructure Control for Selective Phonon Scattering2016

    • Author(s)
      Michitaka Ohtaki
    • Organizer
      Materials Challenges in Alternative & Renewable Energy Conference
    • Place of Presentation
      Clearwater, FL, USA
    • Year and Date
      2016-04-17
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 液相前駆体法によるAg/ZnO 焼結体の微細構造と熱電特性2016

    • Author(s)
      渡邊厚介、大瀧倫卓
    • Organizer
      日本セラミックス協会2016年年会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2016-03-14
    • Related Report
      2015 Annual Research Report
  • [Presentation] Oxide Materials with Ultra-low Lattice Thermal Conductivity2016

    • Author(s)
      Michitaka Ohtaki
    • Organizer
      The EMN Meeting on Thermoelectric Materials
    • Place of Presentation
      アメリカ・Orlando
    • Year and Date
      2016-02-21
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Thermoelectric Performance of Multinary-doped ZnO with Enhanced Phonon Scattering2015

    • Author(s)
      Michitaka Ohtaki, Yuki Iwano, and Taiga Kuragaki
    • Organizer
      The 3rd International Renewable and Sustainable Energy Conference
    • Place of Presentation
      モロッコ・Marrakech
    • Year and Date
      2015-12-10
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effects of microstructure on thermoelectric properties of dually doped ZnO2015

    • Author(s)
      Toshifumi Ogawa, Michitaka Ohtaki
    • Organizer
      The 17th Cross Straits Symposium on Energy and Environmental Science and Technology (CSS-EEST17)
    • Place of Presentation
      九州大学
    • Year and Date
      2015-12-02
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Switching the thermal conductivity by phase transitions in metal oxides2015

    • Author(s)
      Kei Watanabe, Michitaka Ohtaki
    • Organizer
      The 17th Cross Straits Symposium on Energy and Environmental Science and Technology (CSS-EEST17)
    • Place of Presentation
      九州大学
    • Year and Date
      2015-12-02
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Synthesis and thermoelectrics proreties of nanoporous oxide formed by selective leaching of metal nanoparticles2015

    • Author(s)
      Shinji Hirata, Michitaka Ohtaki
    • Organizer
      The 17th Cross Straits Symposium on Energy and Environmental Science and Technology (CSS-EEST17)
    • Place of Presentation
      九州大学
    • Year and Date
      2015-12-02
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Thermoelectric properties of ferroelectric oxides reduced by hydrogen2015

    • Author(s)
      Yoshinao Kai, Michitaka Ohtaki
    • Organizer
      The 17th Cross Straits Symposium on Energy and Environmental Science and Technology (CSS-EEST17)
    • Place of Presentation
      九州大学
    • Year and Date
      2015-12-02
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Thermoelectric properties of Ag/ZnO sintered bodies prepared from soft-chemical precursors2015

    • Author(s)
      Kosuke Watanabe, Michitaka Ohtaki
    • Organizer
      MRS 2015 Fall Meeting & Exhibit
    • Place of Presentation
      アメリカ・Boston
    • Year and Date
      2015-11-29
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Metal Oxides in Thermoelectrics: Beyond a Simple Picture of Ionic Compounds2015

    • Author(s)
      Michitaka Ohtaki
    • Organizer
      International Conference on Thermoelectric Materials Science (TMS2015)
    • Place of Presentation
      名古屋大学
    • Year and Date
      2015-11-09
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent Progress in Oxide Thermoelectric Materials with Microstructure Control for Selective Phonon Scattering2015

    • Author(s)
      Michitaka Ohtaki
    • Organizer
      14th International Union of Materials Research Societies- International Conference on Advanced Materials (IUMRS-ICAM2015)
    • Place of Presentation
      大韓民国・済州島
    • Year and Date
      2015-10-25
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 液相前駆体法によるAg/ZnO焼結体の合成と熱電特性2015

    • Author(s)
      渡邊厚介、大瀧倫卓
    • Organizer
      日本熱電学会第12回学術講演会
    • Place of Presentation
      九州大学
    • Year and Date
      2015-09-07
    • Related Report
      2015 Annual Research Report
  • [Presentation] 金属微粒子の選択溶出によるナノ多孔質酸化物の合成と熱物性2015

    • Author(s)
      平田慎治、大瀧倫卓
    • Organizer
      日本熱電学会第12回学術講演会
    • Place of Presentation
      九州大学
    • Year and Date
      2015-09-07
    • Related Report
      2015 Annual Research Report
  • [Presentation] Selective Phonon Scattering in ZnO-based Bulk Thermoelectric Oxides2015

    • Author(s)
      Michitaka Ohtaki, Taiga Kuragaki, Yuki Iwano, Kiyoshi Yamamoto
    • Organizer
      Advanced Materials World Congress 2015
    • Place of Presentation
      スウェーデン・Stockholm
    • Year and Date
      2015-08-23
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Microstructure and Thermoelectric Properties of 
Ga/Cu-doped ZnO2015

    • Author(s)
      Michitaka Ohtaki, Taiga Kuragaki
    • Organizer
      34th International Conference on Thermoelectrics/13th European Conference on Thermoelectrics (ICT/ECT2015)
    • Place of Presentation
      ドイツ・Dresden
    • Year and Date
      2015-06-28
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 相転移による酸化物材料の熱伝導率変化2015

    • Author(s)
      渡部啓、大瀧倫卓
    • Organizer
      第52回化学関連支部合同九州大会
    • Place of Presentation
      北九州国際会議場
    • Year and Date
      2015-06-27
    • Related Report
      2015 Annual Research Report
  • [Presentation] 水素還元により導電性を付与した強誘電性酸化物の熱電特性2015

    • Author(s)
      甲斐義直、大瀧倫卓
    • Organizer
      第52回化学関連支部合同九州大会
    • Place of Presentation
      北九州国際会議場
    • Year and Date
      2015-06-27
    • Related Report
      2015 Annual Research Report
  • [Presentation] 共ドープしたZnO系酸化物の熱電特性と微細構造制御2015

    • Author(s)
      小川敏史、大瀧倫卓
    • Organizer
      第52回化学関連支部合同九州大会
    • Place of Presentation
      北九州国際会議場
    • Year and Date
      2015-06-27
    • Related Report
      2015 Annual Research Report
  • [Presentation] 金属微粒子の選択溶出によるナノ多孔質酸化物の合成と熱特性2015

    • Author(s)
      平田慎治、大瀧倫卓
    • Organizer
      第52回化学関連支部合同九州大会
    • Place of Presentation
      北九州国際会議場
    • Year and Date
      2015-06-27
    • Related Report
      2015 Annual Research Report
  • [Presentation] 鉄系層状酸化物NaFeO2にPドープしたNaFeO2-xPxの合成2015

    • Author(s)
      荒木陽輔、大瀧倫卓
    • Organizer
      第52回化学関連支部合同九州大会
    • Place of Presentation
      北九州国際会議場
    • Year and Date
      2015-06-27
    • Related Report
      2015 Annual Research Report
  • [Presentation] ZnO-based Oxide Thermoelectric Materials: problems solved and unsolved yet2015

    • Author(s)
      Michitaka Ohtaki
    • Organizer
      The 11th International Conference on Ceramic Materials and Components for Energy and Environmental Applications (CMCEE-11)
    • Place of Presentation
      カナダ・Vancouver
    • Year and Date
      2015-06-14
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Oxide Materials with Enhanced Phonon Scattering for Thermoelectric Energy Conversion2015

    • Author(s)
      Michitaka Ohtaki
    • Organizer
      The 1st International Conference on Microstructure and Property of Materials(MPM-1)
    • Place of Presentation
      中国・Hangzhou
    • Year and Date
      2015-05-26
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Enhanced Phonon Scattering in Nanostructured Oxide Materials2015

    • Author(s)
      Michitaka Ohtaki
    • Organizer
      XVI International Forum on Thermoelectricity
    • Place of Presentation
      フランス・Paris
    • Year and Date
      2015-05-19
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent Aspects of Oxide Ceramic Materials for Thermoelectric Energy Conversion2015

    • Author(s)
      Michitaka Ohtaki
    • Organizer
      BIT’s 1st Annual World Congress of Smart Materials-2015 (WCSM- 2015)
    • Place of Presentation
      Pusan, Korea
    • Year and Date
      2015-03-23 – 2015-03-25
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] New Aspects of Oxide Ceramic Materials for Thermoelectric Energy Conversion2015

    • Author(s)
      Michitaka Ohtaki
    • Organizer
      Energy, Materials and Nanotechnology, Ceramics Meeting 2015
    • Place of Presentation
      Orlando, USA
    • Year and Date
      2015-01-25 – 2015-01-27
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] New Aspects in Oxide Thermoelectric Materials for Heat-to-Electricity Direct Energy Conversion2014

    • Author(s)
      Michitaka Ohtaki, Kohei Mizuta, Yuki Iwano
    • Organizer
      The 13th Eurasia Conference on Chemical Sciences
    • Place of Presentation
      Bangalore, India
    • Year and Date
      2014-12-14 – 2014-12-18
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] Enhanced Phonon Scattering and Carrier Compensation in Multinary-doped ZnO Thermoelectric Oxide2014

    • Author(s)
      Michitaka Ohtaki, Yuki Iwano
    • Organizer
      MRS 2014 Fall Meeting
    • Place of Presentation
      Boston, USA
    • Year and Date
      2014-12-01 – 2014-12-05
    • Related Report
      2014 Annual Research Report
  • [Presentation] Performance Stability of ZnO-based Oxide Thermoelectric Materials at High Temperature2014

    • Author(s)
      Taiga Kuragaki, Michitaka Ohtaki
    • Organizer
      16th Cross Straits Symposium on Energy and Environmental Science and Technology
    • Place of Presentation
      Jeju, Korea
    • Year and Date
      2014-11-13 – 2014-11-15
    • Related Report
      2014 Annual Research Report
  • [Presentation] ZnO系酸化物熱電材料の高温安定性2014

    • Author(s)
      倉垣大河、大瀧倫卓
    • Organizer
      日本熱電学会第11回学術講演会
    • Place of Presentation
      茨城県つくば市
    • Year and Date
      2014-09-29 – 2014-09-30
    • Related Report
      2014 Annual Research Report
  • [Presentation] High-temperature Durability of doped ZnO on Thermal Cycling under Aerobic Conditions2014

    • Author(s)
      Michitaka Ohtaki, Taiga Kuragaki, Taketoshi Tomida
    • Organizer
      The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014)
    • Place of Presentation
      福岡県福岡市
    • Year and Date
      2014-08-24 – 2014-08-28
    • Related Report
      2014 Annual Research Report
  • [Book] Oxide Thin Films, Multilayers and Nanocomposites2015

    • Author(s)
      Michitaka Ohtaki, 他13名
    • Total Pages
      316
    • Publisher
      Springer International Publishing
    • Related Report
      2014 Annual Research Report
  • [Book] 熱電変換材料 実用・活用を目指した設計と開発 ~材料技術/モジュール化/フレキシブル化/実用例~2014

    • Author(s)
      大瀧 倫卓、他28名
    • Total Pages
      249
    • Publisher
      (株)情報機構
    • Related Report
      2014 Annual Research Report
  • [Patent(Industrial Property Rights)] 三酸化二チタン質セラミックスバルク体およびその製造方法2016

    • Inventor(s)
      戸村信雄, 篠崎泰夫, 大瀧倫卓, 渡部 啓
    • Industrial Property Rights Holder
      戸村信雄, 篠崎泰夫, 大瀧倫卓, 渡部 啓
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2016-165798
    • Filing Date
      2016-08-26
    • Related Report
      2016 Annual Research Report

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

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