| ID | 74516 |
| Title Transcription | リュウシケイ オヨビ ソセイ オ セイギョ スル コト ニヨル ユビキタス ブッシツ ノ コウキノウカ : LaTiO2N ケイ サンチッカブツ ノ コウガク トクセイ ノ セイギョ
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| Title Alternative | Highly-functioned materials synthesized from ubiquitous sources by controlling the particle size and composition
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| Author |
Moriga, Toshihiro
Department of Advanced Materials, Institute of Technology and Science, The University of Tokushima|Department of Chemical Science and Technology,Graduate School of Advanced Technology and Science, The University of Tokushima|Department of Chemical Science and Technology,Faculty of Engineering, The University of Tokushima
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Mashima, Ryota
Department of Chemical Science and Technology,Graduate School of Advanced Technology and Science, The University of Tokushima
Yamada, Mayu
Department of Chemical Science and Technology,Graduate School of Advanced Technology and Science, The University of Tokushima
Ando, Hidehito
Department of Chemical Science and Technology,Faculty of Engineering, The University of Tokushima
Kawasaki, Tomooki
Department of Chemical Science and Technology,Faculty of Engineering, The University of Tokushima
Masuda, Yukihiro
Department of Chemical Science and Technology,Graduate School of Advanced Technology and Science, The University of Tokushima
Murai, Kei-ichiro
Department of Advanced Materials, Institute of Technology and Science, The University of Tokushima|Department of Chemical Science and Technology,Graduate School of Advanced Technology and Science, The University of Tokushima|Department of Chemical Science and Technology,Faculty of Engineering, The University of Tokushima
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| Keywords | oxynitride
(non)stoichiometry
bandgap
reflectivity
XPS
particle size
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| Content Type |
Departmental Bulletin Paper
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| Description | Some Perovskite-type LaTiO2+xN1-x with anion nonstoichiometry were prepared by heating
an oxide precursor under ammonia atmosphere and successively annealed under diluted ammonia. Increasing O/N ratio enhances the optical bandgap of the oxynitrides. A series of perovskite-type LaTiO2N materials with compositions a slightly deviated from the stoichiometric metal composition was also prepared. Increasing Ti/La ratio in La1-xTi1+xTiO2N results in deterioration of reflectivity in the longer wavelength region above the absorption edge. A substitution of La by Sr was effective in the enhancement of reflectivity there. Though the increase of O/N ratio in the LaTiO2+xN1-x series was found to cause oxidation of titanium by means of XPS spectroscopy, the valence state of titanium did not change in either the La1-xTi1+xO2N or the La1-xSrxTiO2N series. The increase in Ti/La ratio in the La1-xTi1+xO2N brought the grain/particle growth, which seemed to result in the deterioration of reflectivity. |
| Journal Title |
徳島大学大学院ソシオテクノサイエンス研究部研究報告
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| ISSN | 21859094
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| NCID | AA12214889
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| Volume | 54
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| Start Page | 11
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| End Page | 16
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| Sort Key | 11
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| Published Date | 2009
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| FullText File | |
| language |
jpn
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| departments |
Science and Technology
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