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Development and Mechanism of High Performance Thermoelectric Materials by Dispersion of Fine Particles

Research Project

Project/Area Number 07455289
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Material processing/treatments
Research InstitutionOsaka University

Principal Investigator

NAGAI Hiroshi  Osaka University, Materials Sci.and Eng.Professor, 工学部, 教授 (80029206)

Co-Investigator(Kenkyū-buntansha) KATSUYAMA Shigeru  Osaka University, Mat.Sci.and Eng.Res.Assistant, 工学部, 助手 (00224478)
MAJIMA Kazuhiko  Osaka University, Mat.Sci.and Eng.Associate.Prof., 工学部, 助教授 (60029270)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥7,700,000 (Direct Cost: ¥7,700,000)
Fiscal Year 1996: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1995: ¥6,700,000 (Direct Cost: ¥6,700,000)
KeywordsThermoelectric materials / beta-FeSi_2 / mechanical alloying / nano-composite / thermoelectric power / electrical resistivity / thermal coductivity / powder metallurgy / 焼結材料
Research Abstract

The performance of the thermoelectric materials is represented by the equation of Z=Q^2/rhokappa, where Q is thermoelectric power, rho is electrical resistivity, and kappa is thermal conductivity.
The results obtained are as follows :
1) Dispersion of ZrSi (metallic phase) or SiC (insulator) by mechanical alloying (MA) improved the thermoelectric properties of beta-FeSi_2. It was found that the dispersion of SiC particles decreased the grain size of beta-FeSi_2 and thermal conductivity, kappa, and the dispersion of metallic phase decreased the electrical resistivity, rho.
2) beta-FeSi_2 with dispersion of fine SiC particles (20-30nm) was obtained by MA of FeSi_2 with Si and carbon particles. Dispersion of SiC fine particles increased the performance of beta-FeSi_2 by decreasing thermal conductivity kappa without changes in thermoelectric power Q and electrical resistivity rho.
3) Addition of Zr significantly increased the themoelectrical performance of beta-FeSi_2 by decreasing the electrical resistivity especially at high temperatures.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] 永井宏: "Effects of MA on the Preparation and Thermoelectric Properties of β-FeSi_2." Materials Transaction JIM. 36・2. 365-372 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 永井宏: "MG法によるCu添加β-FeSi_2焼結体の作製と熱電特性" 粉体および粉末冶金. 42・2. 151-155 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 永井宏: "n型およびp型β-FeSi_2の熱電特性に及ぼすCu添加の影響" 粉体および粉末冶金. 42・11. 1323-1327 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 永井宏: "n型Fe_<0.98>Co_<0.02>Si_2の熱電特性に及ぼすAl添加の影響" 粉体および粉末冶金. 42・11. 1328-1332 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 永井宏: "MA法によりSiCを分散したβ-FeSi_2の熱電特性" 粉体および粉末冶金. 43・5. 608-612 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 永井宏: "β-FeSi_2の熱電特性に及ぼすTi, Zr, Nb添加の影響" 粉体および粉末冶金. 44・1. 34-38 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 永井宏: "メカニカルアロイング法を活用したFeSi_2系熱電変換材料の高性能化" まてりあ. 35・9. 952-955 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 永井宏: "メカニカルアロイング法を活用した各種機能性材料の高性能化" 金属. 65・11. 1037-1044 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Nagai: "Effects of Mechanical Alloying and Grinding on Preparation and Thermoelectric Properties of beta-FeSi_2" Mater.Trans.JIM. 36(2). 365-372 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] "Preparation and Thermoelectric Properties of Sintered beta-FeSi_2 doped with Cu by MG" J.Jpn.Soc.Powder & Powder Met.42(2). 151-155 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Nagai: "Effect of Cu Addition on the Thermoelectric Properties of n-type and p-type beta-FeSi_2" J.Jpn.Soc.Powder & Powder Met.42(11). 1323-1327 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Nagai: "Effect of Al Addition on the Thermoelectric Properties of n-type Fe_<0.98>Co_<0.02>Si_2" J.Jpn.Soc.Powder & Powder Met.42(11). 1328-1332 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Nagai: "Thermoelectric Properties of FeSi_2 with SiC Dispersion Prepared by Mechanicalk Alloying" J.Jpn.Soc.Powder & Powder Met.43(5). 608-612 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Nagai: "Effect of Ti, Zr and Nb Addition on Thermoelectric Properties of beta-FeSi_2" J.Jpn.Soc.Powder & Powder Met.44(1). 34-38 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Nagai: "Preparation of High Performance FeSi_2 Thermoelectric Material by using Mechanical Alloying" Materia Japan. 35(9). 952-955 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Nagai: "Preparation of Various High Performance Fuctional Materials by using Mechanical Alloying" KINZOKU. 65(11). 1037-1044 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 永井 宏: "MA法によりSiCを分散したβ-FeSi_2の熱電特性" 粉体および粉末冶金. 43. 608-612 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 永井 宏: "β-FeSi_2の熱電特性に及ぼすTi,ZrおよびNb添加の影響" 粉体および粉末冶金. 44. 34-38 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 永井 宏: "Effects of MA on the Preparation and Thermoelectric Properties of β-FeSi_2." Materials Transaction JIM. 36. 365-372 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 永井 宏: "MG法によるCu添加β-FeSi_2焼結体の作製と熱電特性" 粉体および粉末冶金. 42. 151-155 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 永井 宏: "n型およびp型β-FeSi_2と熱電特性に及ぼすCu添加の影響" 粉体および粉末冶金. 42. 1323-1327 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 永井 宏: "n型Fe_<0.98>Co_<0.02>Si_2の熱電特性に及ぼすAl添加の影響" 粉体および粉末冶金. 42. 1328-1332 (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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