Synthesis and evaluation of new thermoelectric materials composed of group-III and transition metal elements

2012 Fiscal Year Final Research Report

• Project/Area Number: 23760623
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Physical properties of metals
• Research Institution: The University of Tokyo
• Principal Investigator: TAKAGIWA Toshiki 東京大学, 大学院・新領域創成科学研究科, 助教 (90549594)
• Project Period (FY): 2011 – 2012
• Keywords: 金属物性 / 熱電変換材料 / 物性実験 / バンド計算 / 廃熱利用

Research Abstract

The effects of transition metals (Co, Rh, Ir, Ni, Pd) substitution for Ru site in RuGa2 have been investigated. Indeed, we have obtained n-type material of ZTmax = 0.31 through Ir substitution for Ru. Also, ZT for RuGa3, FeGa3, and RuIn3 compounds as p-and n-type materials has been enhanced by carrier doping.

Research Products

• [Journal Article] Validity of rigid band approximation of PbTe thermoelectric materials (2013)
  • Author(s): Y. Takagiwa, Y. Pei, G. Pomrehn, and G. J. Snyder
  • Journal Title: APL-Materials Volume: vol. 1(印刷中)
  • Peer Reviewed
• [Journal Article] Effects of Transition Metal (TM: Co, Rh, Ni, and Pd) Substitution for Ru on Thermoelectric Properties for Intermetallic Compound RuGa2 (2013)
  • Author(s): Y. Takagiwa, K. Kitahara, and K. Kimura
  • Journal Title: Materials Transactions Volume: vol.54 Pages: 953-957
  • Peer Reviewed
• [Journal Article] Effect of electron doping on thermoelectric properties for narrow-bandgap intermetallic compound RuGa2 (2013)
  • Author(s): Y. Takagiwa, K. Kitahara, and K. Kimura
  • Journal Title: Journal of Applied Physics Volume: vol.113 Pages: 023713-1-7
  • Peer Reviewed
• [Journal Article] Dopants effect on the band structure of PbTe thermoelectric material (2012)
  • Author(s): Y. Takagiwa, Y. Pei, G. Pomrehn, and G. J.Snyder
  • Journal Title: Applied Physics Letters Volume: vol. 101 Pages: 092102-1-3
  • Peer Reviewed
• [Journal Article] Structural vacancies of Al-based quasicrystals and anomalous transport property: Positron annihilation studies (2012)
  • Author(s): K. Yamada, M. Saito, H. Suzuki, I. Kanazawa, Y. Takagiwa, and K. Kimura
  • Journal Title: Physics Procedia Volume: vol. 35 Pages: 51-56
  • Peer Reviewed
• [Journal Article] Thermoelectric properties of FeGa3-type narrow-bandgap intermetallic compound Ru(Ga,In)3: Experimental and calculational studies (2012)
  • Author(s): Y. Takagiwa, K. Kitahara, Y. Matsubayashi, and K. Kimura
  • Journal Title: Journal of Applied Physics Volume: vol. 111 Pages: 123707-1-11
  • Peer Reviewed
• [Presentation] Thermoelectric properties of environmental friendly thermoelectric materials: Zintl compounds (2013)
  • Author(s): Y. Takagiwa, A. Zevalkink, K. Kitahara, K. Kimura, and G. J. Snyder
  • Organizer: TMS2013
  • Place of Presentation: San Antonio, United States
  • Year and Date: 2013-03-04
• [Presentation] Structure, Chemical Bonding, and Thermoelectric Properties of Narrow-bandgap Intermetallic Compounds TM(Al,Ga)2 and TM(Ga,In)3: Calculational and Experimental Studies (2012)
  • Author(s): Y. Takagiwa, K. Kitahara, Y. Matsubayashi, Y. Matsuura, K. Kato, M. Takata, and K. Kimura
  • Organizer: 2012 MRS Fall meeting
  • Place of Presentation: Boston, United States
  • Year and Date: 2012-11-29
• [Presentation] キャリアドーピングがFeGa3の熱電物性に与える影響に関する研究 (2012)
  • Author(s): 松浦裕介,北原功一,高際良樹,木村薫
  • Organizer: 日本金属学会秋期大会
  • Place of Presentation: 愛媛大学
  • Year and Date: 2012-09-19
• [Presentation] 電子ドープした金属間化合物RuGa2の熱電特性 (2012)
  • Author(s): 高際良樹,北原功一,木村薫
  • Organizer: 日本金属学会春期大会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2012-03-30
• [Presentation] Novel new thermoelectric materials: Al-based icosahedral quasicrystals and binary intermetallic compounds (2011)
  • Author(s): Y. Takagiwa, K. Kitahara, Y. Matsubayashi, J. T. Okada, and K. Kimura
  • Organizer: International Conference of New Science Created by Materials with Nano Spaces; From Fundamentals to Application
  • Place of Presentation: 東北大学
  • Year and Date: 2011-11-26
• [Presentation] 狭バンドギャップ金属間化合物Ga2Ru1-x(Co,Rh)xの熱電特性 (2011)
  • Author(s): 高際良樹,北原功一,木村薫
  • Organizer: 第8回日本熱電学会学術講演会
  • Place of Presentation: 北海道大学
  • Year and Date: 2011-08-08
• [Presentation] Thermoelectric properties of polygrained FeGa3-type intermetallic compound Ru(Ga,In)3 (2011)
  • Author(s): Y. Takagiwa, K. Kitahara, Y. Matsubayashi, and K. Kimura
  • Organizer: International Conference onThermoelectrics 2011
  • Place of Presentation: Michigan, United States
  • Year and Date: 2011-07-19
• [Presentation] Thermoelectric properties of Al-based quasicrystals and related semiconducting intermetallic compounds (2011)
  • Author(s): Y. Takagiwa, I. Kanazawa, and K. Kimura
  • Organizer: 5th Asia Region International Workshop on Quasicrystals
  • Place of Presentation: Seoul National University, Korea
  • Year and Date: 2011-06-01
• [Book] 熱電変換技術の基礎と応用-クリーンなエネルギー社会を目指して- (2011)
  • Author(s): 高際良樹,木村薫
  • Total Pages: 122-129
  • Publisher: シーエムシー出版
• [Remarks]
  • URL: http://www.phys.mm.t.u-tokyo.ac.jp/