Evaluation of Thermoelectric Properties in Bi-Microwires by the Harman Method

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概要

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• We have improved the Harman method to evaluate all thermoelectric properties related to the figure of merit, $\mathit{ZT}$, not only in bulk materials but also in mesoscopic ones. By this method, the $\mathit{ZT}$ of single microwires can also be determined. The minimum sample size is currently ${\sim}0.25$ mm in length and ${\sim}10$ μm in diameter. The fabrication of our equipment based on the Harman method is described in detail. The enhancement of $\mathit{ZT}$ can be achieved in the Bi-microwire array because of the homogeneous arrangement of the crystal orientation in each microwire. The results obtained in the Bi-microwire arrays are consistent with $\mathit{ZT}$ behavior in the single microwires extracted from the arrays.

• 2008-05-25

著者

• Iwasaki Hideo

  School Of Materials Science Jaist

• Morita Hiroyuki

  Saitama Industrial Technology Center, Kawaguchi, Saitama 333-0844, Japan

• Hasegawa Yasuhiro

  Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama 338-8570, Japan

• Hasegawa Yasuhiro

  Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan

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