Exploration of thermal conductivity switching material with periodic nano-structure transition
Project/Area Number |
20K21075
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Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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Allocation Type | Multi-year Fund |
Review Section |
Medium-sized Section 26:Materials engineering and related fields
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Research Institution | Tokyo Institute of Technology |
Principal Investigator |
Katase Takayoshi 東京工業大学, 科学技術創成研究院, 准教授 (90648388)
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Project Period (FY) |
2020-07-30 – 2022-03-31
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Project Status |
Completed (Fiscal Year 2021)
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Budget Amount *help |
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2020: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
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Keywords | 熱伝導率 / 構造転移 / 第一原理計算 |
Outline of Research at the Start |
膨大な未利用熱の効果的な削減・有効利用に向けて、高度な熱制御技術の確立が期待されている。一般的な物質と異なり、温度上昇と共に熱伝導率が急激に増大する物質があれば、自発的に低温で熱を蓄えて高温で熱を急速に放散する伝熱制御材料を実現できるが、熱伝導率を大きく変化させる物質は無かった。本研究では、応募者が見出した「ナノ周期構造転移」を示す新材料を利用して、従来よりも10倍以上大きく熱伝導率を変化させる熱伝導率変調材料の開拓に挑戦する。熱伝導率制御比を飛躍的に高める新たな熱伝導率変調材料の設計指針を確立し、高度な熱制御技術の発展に貢献する。
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Outline of Final Research Achievements |
Large thermal conductivity (κ) modulation was demonstrated by the reversible 3-dimensional (3D) to 2D crystal structure transition in a nonequilibrium solid solution of (Pb1-xSnx)Se, where Pb2+ stabilizes a 3D cubic structure while Sn2+ does a 2D layered structure. The phase boundary of these phases was induced in (Pb0.5Sn0.5)Se bulk polycrystals by thermally quenching the high-temperature solid solution phase. Through the 3D-2D phase transition, the 1/2.9-times decrease of lattice κ was achieved by strong phonon scattering in the 2D layered structure, and the electronic κ was also decreased by 5 orders of magnitude due to the electronic phase transition from a 3D high conductivity state to a 2D semiconducting state. The total κ modulation ratio = 3.6 was attained at 373 K. The present strategy will lead to a novel concept for designing thermal management materials through crystal-structure dimensionality switch using nonequilibrium phase boundaries.
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Academic Significance and Societal Importance of the Research Achievements |
温度変化による層状化合物のナノ周期構造転移を利用して、熱伝導率が大きく変化する材料(Pb0.5Sn0.5)Seを開発した。実用化に向けては、相転移温度を向上させること、熱伝導率の昇温曲線と降温曲線のヒステリシスを小さくすることなど、解決すべき課題はあるが、さまざまな材料系や結晶構造系の固溶体に展開することでさらなる性能向上が期待できる。今回の研究で得られた、結晶構造を人為的に制御して熱伝導率を変化させるという全く新しいアプローチは今後、結晶構造や化学結合が異なるさまざまな無機結晶系においても、高度な熱制御が可能な材料開発につながると期待される。
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Report
(3 results)
Research Products
(51 results)
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[Journal Article] Design, Synthesis, and Optoelectronic Properties of the High-Purity Phase in Layered AETMN2 (AE = Sr, Ba; TM = Ti, Zr, Hf) Semiconductors2022
Author(s)
Akihiro Shiraishi, Shigeru Kimura, Xinyi He, Naoto Watanabe, Takayoshi Katase, Keisuke Ide, Makoto Minohara, Kosuke Matsuzaki, Hidenori Hiramatsu, Hiroshi Kumigashira, Hideo Hosono, and Toshio Kamiya
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Journal Title
Inorg. Chem.
Volume: 61
Issue: 17
Pages: 6650-6659
DOI
Related Report
Peer Reviewed
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[Journal Article] Electronic and Lattice Thermal Conductivity Switching by 3D-2D Crystal Structure Transition in Nonequilibrium (Pb1-xSnx)Se2022
Author(s)
Y. Nishimura, Xinyi He, Takayoshi Katase, Terumasa Tadano, Keisuke Ide, Suguru Kitani, Kota Hanzawa, Shigenori Ueda, Hidenori Hiramatsu, Hitoshi Kawaji, Hideo Hosono, and Toshio Kamiya
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Journal Title
Adv. Electron. Mater.
Volume: 0
Issue: 9
Pages: 2200024-2200024
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Large phonon drag thermopower boosted by massive electrons and phonon leaking in LaAlO3/LaNiO3/LaAlO3 heterostructure2021
Author(s)
Masatoshi Kimura, Xinyi He, Takayoshi Katase, Terumasa Tadano, Jan M. Tomczak, Makoto Minohara, Ryotaro Aso, Hideto Yoshida, Keisuke Ide, Shigenori Ueda, Hidenori Hiramatsu, Hiroshi Kumigashira, Hideo Hosono, and Toshio Kamiya
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Journal Title
Nano Lett.
Volume: 21
Issue: 21
Pages: 9240-9246
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Breaking of thermopower - conductivity trade-off in LaTiO3 film around Mott insulator to metal transition2021
Author(s)
Takayoshi Katase, Xinyi He, Terumasa Tadano, Jan M. Tomczak, Takaki Onozato, Keisuke Ide, Bin Feng, Tetsuya Tohei, Hidenori Hiramatsu, Hiromichi Ohta, Yuichi Ikuhara, Hideo Hosono, and Toshio Kamiya
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Journal Title
Adv. Sci.
Volume: 8
Issue: 23
Pages: 202102097-202102097
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Reversible 3D-2D structural phase transition and giant electronic modulation in non-equilibrium alloy semiconductor, lead-tin-selenide2021
Author(s)
Takayoshi Katase, Yudai Takahashi, Xinyi He, Terumasa Tadano, Keisuke Ide, Hideto Yoshida, Shiro Kawachi, Junichi Yamaura, Masato Sasase, Hidenori Hiramatsu, Hideo Hosono, and Toshio Kamiya
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Journal Title
Science Adv.
Volume: 7
Issue: 12
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Double charge polarity switching in Sb-doped SnSe with switchable substitution sites2020
Author(s)
Chihiro Yamamoto, Xinyi He, Takayoshi Katase, Keisuke Ide, Yosuke Goto, Yoshikazu Mizuguchi, Akane Samizo, Makoto Minohara, Shigenori Ueda, Hidenori Hiramatsu, Hideo Hosono, and Toshio Kamiya
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Journal Title
Adv. Funct. Mater.
Volume: 31
Issue: 8
Pages: 2008092-2008092
DOI
Related Report
Peer Reviewed
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[Presentation] 3D-2D structural phase transition and giant electronic conductivity modulation in non-equilibrium hetero-structural alloy, (Pb1-xSnx)Se2021
Author(s)
Takayoshi Katase, Xinyi He, Terumasa Tadano, Keisuke Ide, Hideto Yoshida, Shiro Kawachi, Junichi Yamaura, Masato Sasase, Hidenori Hiramatsu, Hideo Hosono, Toshio Kamiya
Organizer
The Twelfth International Conference on the Science and Technology for Advanced Ceramics (STAC12)
Related Report
Int'l Joint Research
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[Presentation] Two-dimensional layered semiconductors AETMN2 (AE = Sr, Ba; TM = Ti, Zr, Hf); high-purity bulk synthesis and electronic property characterization2021
Author(s)
Shigeru Kimura, Akihiro Shiraishi, Xinyi He, Takayoshi Katase, Keisuke Ide, Hidenori Hiramatsu, Hideo Hosono, Toshio Kamiya
Organizer
2021 Materials Research Society Fall Meeting & Exhibit
Related Report
Int'l Joint Research
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[Presentation] Appearance and large enhancement of phonon drag thermopower by epitaxial strain and phonon leaking from LaAlO3 in LaNiO32021
Author(s)
Masatoshi Kimura, Xinyi He, Takayoshi Katase, Terumasa Tadano, Jan M. Tomczak, Makoto Minohara, Ryotaro Aso, Hideto Yoshida, Keisuke Ide, Shigenori Ueda, Hidenori Hiramatsu, Hiroshi Kumigashira, Hideo Hosono, Toshio Kamiya
Organizer
Materials Research Meeting 2021
Related Report
Int'l Joint Research
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[Presentation] Electronic structures and electronic properties of 2-dimensional layered semiconductors, AETMN2 (AE = Sr, Ba; TM = Ti, Zr, Hf)2021
Author(s)
Shigeru Kimura, Akihiro Shiraishi, Xinyi He, Takayoshi Katase, Keisuke Ide, Hidenori Hiramatsu, Hideo Hosono, and Toshio Kamiya
Organizer
The Twelfth International Conference on the Science and Technology for Advanced Ceramics (STAC12)
Related Report
Int'l Joint Research
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