フォノン輸送の視点からのナノ焼結体の熱伝導解析

• 堀 琢磨

  東京大学大学院工学系研究科機械工学専攻

• 塩見 淳一郎

  東京大学大学院工学系研究科機械工学専攻

書誌事項

タイトル別名

• Thermal Conductance Analysis of Sintered Nanostructures from the Viewpoint of Phonon Transport
• フォノン ユソウ ノ シテン カラ ノ ナノ ショウケツタイ ノ ネツ デンドウ カイセキ

抄録

ABSTRACT<BR><BR>Over the last decade, there has been a great enhancement in efficiency of bulk thermoelectric materials by reducing lattice thermal conductivity with internal nanostructures. This includes sintered nanostructures, which has merit in applicability and scalability. While the material development so far has been rather empirical, for further improvement of the bulk nanostructured materials, the need for material design based on prediction of lattice thermal conductivity is growing. This paper reviews recently developed multiscale method to calculate lattice thermal conductivity of bulk crystalline nanostructures. The method seamlessly combines first-principles calculations of interatomic force constants, lattice dynamics calculations of intrinsic phonon transport properties, and Monte Carlo simulation of phonon Boltzmann transport through nanostructures. The method can handle phonon transport through a large system with randomly placed and shaped nanostructures, and thus it is sufficient to quantify how reduction of thermal conductivity of polycrystalline nanostructures depends on mean size and distribution of nano-grains. The results for sintered polycrystalline silicon nanostructure are presented.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 62 (4), 169-174, 2015

  一般社団法人 粉体粉末冶金協会

キーワード

• Thermoelectrics
• Sintered Nanomaterial
• Phonon Transport
• Thermal Conductivity
• Monte Calrlo Simulation

詳細情報

• CRID: 1390001206311659392
• NII論文ID: 130005066970
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.62.169
• ISSN: 18809014
• ISSN: 05328799
• NDL書誌ID: 026355312
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I026355312
• 本文言語コード: ja
• データソース種別:
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  • KAKEN
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