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Development of volumetric heat capacity measurement for earth deep interior materials under high temperatures and pressures.

Research Project

Project/Area Number 19H01995
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 17040:Solid earth sciences-related
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Yagi Takashi  国立研究開発法人産業技術総合研究所, 計量標準総合センター, 研究グループ長 (10415755)

Co-Investigator(Kenkyū-buntansha) 太田 健二  東京工業大学, 理学院, 准教授 (20727218)
Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2022: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2021: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2019: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
Keywords高圧 / 高温 / マントル / コア / 熱物性 / 熱伝導 / 比熱 / 体積熱容量 / 熱伝導率 / 比熱測定 / 比熱容量 / 超高圧 / 超高温 / 地球深部
Outline of Research at the Start

地球深部条件に匹敵する高温・高圧下にある物質の比熱測定例は皆無であり、このデータの欠落が地球内部の伝熱描像に大きな不確かさをもたらしている。本研究では、サーモリフレクタンス法と呼ぶ光温度計測技術とパルス光と変調光による同時加熱技術を組み合わせることで、ダイヤモンドアンビルセル内に封入された高圧・高温条件にあるサンプルの単位体積当たり熱容量の直接測定技術を開発し、地球深部物質の比熱値の温度・圧力依存性を明らかにする。本研究で得られる実験データは、核からマントルに至る地球内部の温度分布の精密化、地球の熱進化の過程解明、マントル対流やダイナモシミュレーションの精緻化に重要な役割を果たす。

Outline of Final Research Achievements

The aim of this study is to develop a volumetric heat capacity measurement technique under high temperature and high pressure conditions, and to clarify the dependence of the thermophysical properties of the Earth's core and mantle on both the temperature and the pressure axis. Thermophysical properties of major minerals in the lower mantle (Fe-bearing perovskite, post-perovskite and MgO periclase), Pt as a metallic reflective layer important in specific heat capacity measurements, and hcp iron important in elucidating the thermal evolution of the earth's core were obtained under ultrahigh pressure (up to 170 GPa) and ultra-high temperature (up to 2900 K) conditions. Based on these results, we obtained important clues for understanding heat conduction from the Earth's core to the mantle.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果は、地球の中心がどのようになっているのか、そして過去および将来の地球がどのように変化をしていくのかを、マントルや核の類似の条件で熱物性値を計測して解明するものです。マントル物質や地球核と考えられる鉄の熱伝導率の計測に成功し、これらのデータは原始地球からの現在までの進化の過程やマントル対流の解明などに貢献します。
また本研究で開発した技術は、約200万気圧かつ数千ケルビンという超高温高圧で物質がどのようにふるまうかを知ることができるものであり、新物質や新物性の探索・解明に役立つことが期待できます。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (13 results)

All 2023 2022 2021 2020 2019

All Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (8 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Thermal conductivity of platinum and periclase under extreme conditions of pressure and temperature2023

    • Author(s)
      Hasegawa Akira、Ohta Kenji、Yagi Takashi、Hirose Kei
    • Journal Title

      High Pressure Research

      Volume: 43 Issue: 1 Pages: 68-80

    • DOI

      10.1080/08957959.2023.2193892

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Compressional wave velocity for iron hydrides to 100 gigapascals via picosecond acoustics2022

    • Author(s)
      Wakamatsu Tatsuya、Ohta Kenji、Tagawa Shoh、Yagi Takashi、Hirose Kei、Ohishi Yasuo
    • Journal Title

      Physics and Chemistry of Minerals

      Volume: 49 Issue: 5 Pages: 17-17

    • DOI

      10.1007/s00269-022-01192-8

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Thermal conductivity of Fe-bearing post-perovskite in the Earth's lowermost mantle2020

    • Author(s)
      Okuda Yoshiyuki、Ohta Kenji、Hasegawa Akira、Yagi Takashi、Hirose Kei、Kawaguchi Saori I.、Ohishi Yasuo
    • Journal Title

      Earth and Planetary Science Letters

      Volume: 547 Pages: 116466-116466

    • DOI

      10.1016/j.epsl.2020.116466

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Composition and pressure dependence of lattice thermal conductivity of (Mg,Fe)O solid solutions2019

    • Author(s)
      Hasegawa Akira、Ohta Kenji、Yagi Takashi、Hirose Kei、Okuda Yoshiyuki、Kondo Tadashi
    • Journal Title

      Comptes Rendus Geoscience

      Volume: - Issue: 2-3 Pages: 229-235

    • DOI

      10.1016/j.crte.2018.10.005

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Combination of pulsed light heating thermoreflectance and laser-heated diamond anvil cell for in-situ high pressure-temperature thermal diffusivity measurements2019

    • Author(s)
      Akira Hasegawa, Takashi Yagi, Kenji Ohta
    • Journal Title

      Review of Scientific Instruments

      Volume: 90 Issue: 7 Pages: 74901-74901

    • DOI

      10.1063/1.5093343

    • NAID

      120006889163

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] ピコ秒超音波法による下部マントル主要構成鉱物の音速測定2022

    • Author(s)
      若松達也,太田健二, 奥田善之,八木貴志,西原遊,廣瀬敬,大石泰生
    • Organizer
      高圧討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 地球コア相当の高圧力高温条件における鉄の熱伝導率2021

    • Author(s)
      長谷川 暉、太田健二、廣瀬敬、大石泰生、八木 貴志
    • Organizer
      第42回日本熱物性シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] 地球コア相当の高圧力高温条件における鉄の熱伝導率とローレンツ数2021

    • Author(s)
      長谷川 暉、太田健二、廣瀬敬、大石泰生、八木 貴志
    • Organizer
      第62回高圧討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Thermal Conductivity Measurement at High Pressure and High Temperature Similar to Earth’s Lower Mantle Conditions2019

    • Author(s)
      長谷川 暉、太田健二、八木 貴志、廣瀬敬
    • Organizer
      Goldschmidt2019 (Barcelona, Spain)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Thermal conductivity of MgO periclase up to 140 GPa and 2000 K2019

    • Author(s)
      長谷川 暉、太田健二、八木 貴志、廣瀬敬
    • Organizer
      AGU Fall Meeting 2019 (SanFrancisco, USA)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Thermal conductivity measurements on iron and MgO periclase at high pressure and high temperature similar to the Earth’s mid-lower mantle conditions2019

    • Author(s)
      長谷川 暉、太田健二、八木 貴志、廣瀬敬
    • Organizer
      日本地球惑星科学連合2019年大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 地球深部相当の高温高圧力条件下熱伝導率測定技術の開発(2)2019

    • Author(s)
      長谷川 暉、太田健二、八木 貴志、廣瀬敬
    • Organizer
      第40回熱物性シンポジウム
    • Related Report
      2019 Annual Research Report
  • [Presentation] 高温高圧力条件におけるMgOの熱伝導率2019

    • Author(s)
      長谷川 暉、太田健二、八木 貴志、廣瀬敬
    • Organizer
      第60回高圧討論会
    • Related Report
      2019 Annual Research Report

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Published: 2019-04-18   Modified: 2024-01-30  

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