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Thermoelectric properties of layered perovskite-type (Sr1_x Cax)3 (Ti1_y Nby)2 O7
http://hdl.handle.net/2237/8773
http://hdl.handle.net/2237/87730ec9553b-2577-424c-bd47-5206bfbb288c
名前 / ファイル | ライセンス | アクション |
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2007-09-21 | |||||
タイトル | ||||||
タイトル | Thermoelectric properties of layered perovskite-type (Sr1_x Cax)3 (Ti1_y Nby)2 O7 | |||||
言語 | en | |||||
著者 |
Lee, kyu Hyoung
× Lee, kyu Hyoung× Kim, Sung Wng× Ohta, Hiromichi× Koumoto, Kunihito |
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アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
権利 | ||||||
言語 | en | |||||
権利情報 | Copyright (2007) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. | |||||
抄録 | ||||||
内容記述 | The thermoelectric properties and crystallographic features of layered perovskite-type Ca-substituted (Sr1−xCax)3(Ti1−yNby)2O7 (y=0–0.2), Ruddlesden-Popper phases were investigated. The influence of crystal structure and carrier concentration on the carrier effective mass for Ti-based metal oxides based on TiO6 octahedra and having a significant Ca substitution effect are discussed. It was found from structural analysis that the large Seebeck coefficients of Ca-substituted compounds can be attributed to the high values of carrier effective mass, which originates from the enhancement of the symmetry of the TiO6 octahedra. Low thermal conductivities, 3.6–3.8 W m−1 K−1 at 300 K, were obtained for Ca-substituted compositions due to phonon scattering at SrO/ (SrTiO3)2 interfaces of the inherent superlattice structure and to mass-defect phonon scattering between Ca (MCa=40) and Sr (MSr=88). The highest ZT value obtained was 0.15 at 1000 K, for 10 at % Ca-substituted Sr3(Ti0.95Nb0.05)2O7. | |||||
言語 | en | |||||
内容記述タイプ | Abstract | |||||
出版者 | ||||||
言語 | en | |||||
出版者 | American Institute of Physics | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプresource | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1063/1.2718280 | |||||
ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 0021-8979 | |||||
書誌情報 |
en : JOURNAL OF APPLIED PHYSICS 巻 101, 号 8, p. 083707-083707, 発行日 2007-04-15 |
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フォーマット | ||||||
application/pdf | ||||||
著者版フラグ | ||||||
値 | publisher | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2237/8773 | |||||
識別子タイプ | HDL |