Thermoelectric Properties of Quasicrystalline Approximant in Al–Cu–Ir System

DOI Web Site Web Site 2 Citations 30 References Open Access
  • Kitahara Koichi
    Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo AIST–UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO–OIL), National Institute of Advanced Industrial Science and Technology (AIST)
  • Takagiwa Yoshiki
    Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo National Institute for Materials Science
  • Kimura Kaoru
    Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo AIST–UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO–OIL), National Institute of Advanced Industrial Science and Technology (AIST)

Bibliographic Information

Other Title
  • Al–Cu–Ir系近似結晶の熱電特性
  • Al-Cu-Irケイ キンジ ケッショウ ノ ネツデントクセイ

Search this article

Abstract

<p>Thermoelectric properties of a cubic quasicrystalline approximant in Al–Cu–Ir system were investigated experimentally and theoretically. A homogeneous sample with no secondary phase was synthesized using an arc-melting and a spark-plasma-sintering processes followed by heat treatment at 1173 K, and its thermoelectric properties were measured at temperatures between 373 K and 1023 K. Theoretical calculations of the thermoelectric properties were performed under three different approximations, i.e., constant-relaxation-time, constant-mean-free-path, and constant-diffusion-coefficient approximations, for the energy dependence of the relaxation time of the electrons. The experimental Seebeck coefficient was well reproduced, and physically acceptable lattice thermal conductivity was estimated only under constant-diffusion-coefficient approximation for the present material. Thermoelectric figure of merit zT of the present sample was lower than 0.1, and the maximum value of zT ≈ 0.3 achievable by electron doping was predicted by the theoretical calculation under the rigid-band approximation.</p>

Journal

Citations (2)*help

See more

References(30)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top