Thermoelectric properties of double-perovskite oxide Sr<sub>2-<i>x</i></sub><i>M</i><sub><i>x</i></sub>FeMoO<sub>6</sub> (<i>M</i> = Ba, La)
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- SUGAHARA Tohru
- Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
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- OHTAKI Michitaka
- Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University CREST, Japan Science and Technology Agency
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- SOUMA Takeshi
- Department of Electro-Mechanical System Engnineering, Takamatsu National College of Technology
Bibliographic Information
- Other Title
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- Thermoelectric properties of double-perovskite oxide Sr2-xMxFeMoO6(M = Ba, La)
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Abstract
Doping effects for the A-site in double-perovskite type oxide Sr2-xMxFeMoO6 (M = Ba, La) are investigated on the thermoelectric properties of the oxides. The Seebeck coefficient, S, shows that all the samples of both Ba- and La-doped Sr2FeMoO6 systems are n-type over the measured temperature range. In particular, the power factor, S2σ, of the Sr2FeMoO6 system largely increased with increasing Ba doping level up to x = 0.3. As a consequence, S2σ of Sr1.7Ba0.3FeMoO6 reached ca. 0.8 × 10-4 W/mK2, the largest value of all the samples in this study. The thermal conductivity, κ, shows a general trend in which the value decreases from ca. 1 W/mK at room temperature to ca. 0.7 W/mK at 1100 K. The dimensionless figure of merit, ZT, of the Ba-doped samples increased with increasing Ba doping level. Moreover, the ZT value drastically increased above 700 K due to the S2σ value increasing above 700 K and the κ value decreasing monotonically. As a result, the ZT value of Sr1.7Ba0.3FeMoO6 reached 0.31 at 1100 K.
Journal
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- Journal of the Ceramic Society of Japan
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Journal of the Ceramic Society of Japan 116 (1360), 1278-1282, 2008
The Ceramic Society of Japan
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Details 詳細情報について
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- CRID
- 1390001205283983488
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- NII Article ID
- 110007007491
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- NII Book ID
- AA12229489
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- COI
- 1:CAS:528:DC%2BD1cXhsFaitLnE
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- ISSN
- 13486535
- 18820743
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- NDL BIB ID
- 9721917
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed