Thermoelectric properties and phase transition of (ZnxCu 2-x)V2O7

Kotaro Sotojima, Ryosuke O. Suzuki, Koji Amezawa, Yoichi Tomii

研究成果: Article査読

2 被引用数 (Scopus)

抄録

Phase stability and thermoelectric properties of a layered structure of (ZnxCu2-x)V2O7 solid solution were studied at x > 0.2. X-ray diffraction measurements, compositional studies and thermal analysis clarified that the low temperature form of (Zn xCu2-x)V2O7 solid solution (monoclinic structure, C2/c) was stable at 0.2a≤x≤2 when annealed at 823 K in air. On heating, the phase transformation occurred at 0.2 ≤ x < 2 at a nearly constant temperature around 873 K, above which a high temperature form of (ZnxCu2-x)V2O7 solid solution was formed. Seebeck coefficients of the low temperature form of (Zn xCu2-x)V2O7 solid solution showed the large negative value of about -520 to -700μV/K, and the electrical resistivity increased with Zn addition. Power factor was the maximum of 1.99 × 10-7 W/m K2 at 873 K for the low temperature form of the (Zn0.2Cu1.8)V2O7 solid solution.

本文言語English
ページ(範囲)356-361
ページ数6
ジャーナルFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
54
5
DOI
出版ステータスPublished - 2007 5月

ASJC Scopus subject areas

  • 機械工学
  • 産業および生産工学
  • 金属および合金
  • 材料化学

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