Development of Dual Phase Thermoelectric Materials with Local Phonon Mismatch

2012 Fiscal Year Final Research Report

• Project/Area Number: 23760665
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Structural/Functional materials
• Research Institution: Kyoto University
• Principal Investigator: OKAMOTO Norihiko L 京都大学, 大学院・工学研究科, 助教 (60505692)
• Project Period (FY): 2011 – 2012
• Keywords: フォノン散乱 / 透過電子顕微鏡 / 熱電変換材料 / 格子熱伝導率

Research Abstract

The aim of the project was to improve thermoelectric properties of dual-phase inclusion compounds through the phonon scattering at the hetero-interfaces. In dual-phase ingots of Ba- and Sr-encapsulated clathrate compounds, the hetero-interface has an atomistically coherent cage structure with different encapsulated species. Investigation of the thermoelectric properties of the dual phase crystals gives signs of a property improvement compared to the monolithic compounds.

Research Products

• [Journal Article] Direct Observation of Vacancies and Local Thermal Vibration in Thermoelectric Rhenium Silicide (2012)
  • Author(s): Shunta Harada, Katsushi Tanaka, Kyosuke Kishida, Norihiko L. Okamoto, Noriaki Endo, Eiji Okunishi, and Haruyuki Inui
  • Journal Title: Applied Physics Express Volume: Vol. 5 Pages: 35203
  • DOI: DOI:10.1143/APEX.5.035203
  • Peer Reviewed
• [Journal Article] High-TCFerromagnetic Semiconductor-Like Behavior and Unusual Electrical Properties inCompounds with a 2×2×2 Superstructure of the Half-Heusler Phase (2012)
  • Author(s): Ding-Bang Xiong, Norihiko L. Okamoto, Takeshi Waki, Yufeng Zhao, Kyosuke Kishida, and Haruyuki Inui
  • Journal Title: Chemistry A European Journal Volume: Vol. 18 Pages: 2536-2542
  • DOI: DOI:10.1002/chem.201102939
  • Peer Reviewed
• [Journal Article] 異相界面制御によるチムニーラダーシリサイドの熱電特性向上 (2012)
  • Author(s): 岡本 範彦, 乾 晴行
  • Journal Title: 粉体および粉末冶金 Volume: 第59巻 Pages: 175-179
  • DOI: DOI:10.2497/jjspm.59.175
  • Peer Reviewed
• [Journal Article] Planar Symmetry Incompatibility in Ru-Sn-Zn Pseudo-Decagonal Approximants Composed of Novel Pentagonal Antiprisms (2011)
  • Author(s): Ding-Bang Xiong, Norihiko L. Okamoto, and Haruyuki Inui
  • Journal Title: Inorganic Chemistry Volume: Vol. 50, Issue 3 Pages: 827-835
  • DOI: DOI:10.1021/ic101720m
  • Peer Reviewed
• [Journal Article] 「PBET 界面制御によるチムニーラダー化合物の熱電特性改善」ミニ特集企画『「熱を電気に直接変換」熱電変換材料の現状と将来像』 (2011)
  • Author(s): 岡本 範彦, 足立 大樹, 岸田 恭輔, 田中 克志, 乾 晴行
  • Journal Title: 日本金属学会誌「まてりあ」 Volume: 第50巻, 第4号 Pages: 149-151
  • Peer Reviewed
• [Journal Article] Direct Observation of an Ordered Arrangement of Vacancies and Large Local Thermal Vibration in Rhenium Silicide by Cs-corrected STEM (2011)
  • Author(s): Shunta Harada, Katsushi Tanaka, Kyosuke Kishida, Norihiko L. Okamoto, Haruyuki Inui, Noriaki Endo and Eiji Okunishi
  • Journal Title: Materials Research Society Symposium Proceedings Volume: Vol. 1295
  • DOI: DOI:10.1557/opl.2011.43
  • Peer Reviewed
• [Presentation] チムニーラダーシリサイドにおけるPBET 界面構造と熱電特性 (2012)
  • Author(s): 岡本 範彦,足立 大樹,岸田 恭輔,田中 克志,乾 晴行
  • Organizer: 第59回応用物理学関係連合講演会
  • Place of Presentation: 早稲田大学
  • Year and Date: 2012-03-15
• [Presentation] チムニーラダーシリサイドのナノ構造制御による熱電特性向上 (2012)
  • Author(s): 岡本 範彦
  • Organizer: 日本熱電学会第14回研究会
  • Place of Presentation: 大阪大学
  • Year and Date: 2012-01-10
• [Presentation] 異相界面制御によるチムニーラダーシリサイドの熱電特性向上 (2011)
  • Author(s): 岡本 範彦,乾 晴行
  • Organizer: 粉体粉末冶金協会平成23年度秋季大会
  • Place of Presentation: 大阪大学
  • Year and Date: 2011-10-26
• [Book] 熱電変換技術の基礎と応用-クリーンなエネルギ社会を目指して- (2011)
  • Author(s): 岡本 範彦, 乾 晴行
  • Total Pages: 116-121
  • Publisher: CMC 出版
• [Remarks] 個人
  • URL: http://nlokamoto.web.fc2.com/
• [Remarks] 研究室
  • URL: http://imc.mtl.kyoto-u.ac.jp/