Thermoelectric Properties and Phase Transition of (ZnxCu2−x)V2O7

Sotojima, Kotaro; Suzuki, Ryosuke O.; Amezawa, Koji et al.

Materials Transactions, 2007, 48(8), 2094-2099

Permalink : https://hdl.handle.net/2115/50114

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アクセス権
open access
URI
https://hdl.handle.net/2115/50114
タイトル
Thermoelectric Properties and Phase Transition of (ZnxCu2−x)V2O7
著者
Sotojima, Kotaro ; Suzuki, Ryosuke O. ; Amezawa, Koji ; Tomii, Yoichi
著者名
Sotojima, Kotaro
e-Rad_Researcher
80179275
著者名
Suzuki, Ryosuke O.
著者名
Amezawa, Koji
著者名
Tomii, Yoichi
言語
英語
キーワード
Seebeck coefficient
electrical resistivity
vanadium oxide
phase diagram
layered structure
発行日
2007
出版者
Thermoelectrics Society of Japan
収録物名
Materials Transactions
巻(号)
48(8)
ページ
2094-2099
抄録
The phase stability and thermoelectric properties of the layered structure of (ZnxCu2-x)V2O7 solid solutions were studied for x ≥ 0.2. X-ray diffraction measurements, compositional studies, and thermal analysis verified that the low-temperature form of the (ZnxCu2-x)V2O7 solid solution (monoclinic structure, C2/c) was stable for 0.2 ≤ x ≤ 2 when heated below 863K in air. On heating, phase transformation occurred at least at 0.2 ≤ x ≤ 2 at a nearly constant temperature of approximately 873 K; above this temperature, a high-temperature form of the (ZnxCu2-x)V2O7 solid solution was formed. The Seebeck coefficients of the low-temperature (ZnxCu2-x)V2O7 solid solution exhibited large negative values in the range of approximately -520 to -700 μV/K, and the electrical resistivity increased with Zn addition. The maximum power factor of 1.99 x 10^[-7] W/mK2 was obtained at 823K for the low-temperature form of the (Zn0.2Cu1.8)V2O7 solid solution.
資源タイプ
学術雑誌論文
出版タイプ
Version of Record
PISSN
1345-9678
EISSN
1347-5320
関連情報 (isIdenticalTo)
出版社版DOI
https://doi.org/10.2320/matertrans.E-MRA2007856