Phase-Stability and Photoluminescence of BaTi(Si, Ge)3O9
-
- TAKAHASHI Yoshihiro
- International Center for Young Scientists, National Institute for Materials Science
-
- KITAMURA Kenji
- Advanced Materials Laboratory, National Institute for Materials Science
-
- IYI Nobuo
- Advanced Materials Laboratory, National Institute for Materials Science
-
- INOUE Satoru
- Advanced Materials Laboratory, National Institute for Materials Science
Bibliographic Information
- Other Title
-
- BaTi(Si, Ge)<sub>3</sub>O<sub>9</sub> の相安定性と発光特性
Search this article
Abstract
The BaTiSi3-xGexO9 crystalline phases were synthesized, and their phase-stability and photoluminescent (PL) properties were investigated. The benitoite and tetragermanate-type phases were crystallized in the range of x=0.75-1.5 and x=2.0-3.0, respectively. It was suggested that Ge4+ occupies the octahedral Ti site due to the closeness of each ionic radii. The diffuse-reflection spectra revealed an increase in the oxygen-defect center by substitution of Ge in the crystalline phase. Although the BaTiSi2.25Ge0.75O9 phase showed an efficient blue PL at room temperature, the PL intensity decreased drastically with the increasing x, and eventually the BaTiGe3O9 phase indicated a very weak PL in spite of almost the same structure as benitoite, that is, the absolutely-isolated TiO6 octahedral unit and the Ge3O9 ring. It was suggested that the reduction of the PL intensity in the BaTi(Si, Ge)3O9 phase was caused by the increase in the oxygen-defect center.<br>
Journal
-
- Journal of the Ceramic Society of Japan
-
Journal of the Ceramic Society of Japan 114 (1328), 313-317, 2006
The Ceramic Society of Japan
- Tweet
Details 詳細情報について
-
- CRID
- 1390001205279399296
-
- NII Article ID
- 130000300556
-
- NII Book ID
- AN10040326
-
- ISSN
- 18821022
- 09145400
-
- NDL BIB ID
- 7913485
-
- Text Lang
- en
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed