期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 352, 期 21-22, 页码 2254-2258出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2006.02.047
关键词
oxynitride glasses; luminescence; silica; NMR, MAS-NMR and NQR
The aluminum coordination state in bismuth doped silica glass, which has new broad infrared emission at 1.3 mu m regions, was investigated by using Al-27 NMR, and it is demonstrated that 6-fold coordinated aluminum ions with corundum structure are dominant in bismuth doped silica glass until Bi2O3 concentrations of 1.0 mol% with Al2O3. The aluminum ion efficiently affects the creation of a Bi luminescent center at an intensity of Bi2O3 (1.0 mol%)-Al2O3 (2.3 mol%)-SiO2 (96.7 mol%); the sample is three orders of magnitude larger than the Bi2O3 (1.0 mol%-SiO2 (99.0 mol%) sample. Aluminum ions with corundum structure in silica glass have a very important role for the configuration of peculiar Bi luminescent centers. (c) 2006 Elsevier B.V. All rights reserved.
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