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
Title Alternative
Highly-functioned materials synthesized from ubiquitous sources by controlling the particle size and composition
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 Tokushima University Educator and Researcher Directory KAKEN Search Researchers
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 Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Keywords
oxynitride
(non)stoichiometry
bandgap
reflectivity
XPS
particle size
Content Type
Departmental Bulletin Paper
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
ISSN
21859094
NCID
AA12214889
Volume
54
Start Page
11
End Page
16
Sort Key
11
Published Date
2009
FullText File
language
jpn
departments
Science and Technology