文献类型：期刊文献

英文题名：The red-shift of ultraviolet spectra and the relation to optical basicity of Ce-doped alkali rare-earth phosphate glasses

作者：Chen, Guorong[1,2]; Baccaro, Stefania[2]; Nikl, Martin[3]; Cecilia, Angelica[2]; Du, Yunxia Yang[1]; Mihokova, Eva[3]

机构：[1]E China Univ Sci & Technol, Dept Inorgan Mat, Shanghai 200237, Peoples R China;[2]ENEA, FIS, ION, I-00060 Rome, Italy;[3]ASCR, Inst Phys, Prague 16253, Czech Republic

年份：2004

卷号：87

期号：7

起止页码：1378

外文期刊名：JOURNAL OF THE AMERICAN CERAMIC SOCIETY

收录：;EI(收录号：2004378350872);WOS:【SCI-EXPANDED(收录号:WOS:000222927800037)】；

语种：英文

外文关键词：Absorption spectroscopy - Cerium - Composition - Doping (additives) - Emission spectroscopy - Gadolinium compounds - Microscopic examination - Phosphates - Sodium compounds - Substitution reactions - Ultraviolet spectroscopy

摘要：The ultraviolet absorption and emission spectra of Ce3+ doped phosphate glasses based on gadolinium and sodium phosphates are studied in the present work. Compared with the cerium-free phosphate glass matrixes, CePO4 doping shifts the ultraviolet absorption edge of glasses into the longer wavelength because of the 4f-5d absorption transition of Ce3+. The emission spectra correlate such red-shift with glass compositions. Explanations are based on variation in the optical basicity of glasses, which corresponds not only to the alkali content but also to the O/P ratio. The latter is proportional to the number of nonbridging oxygen in the oxyanion unit (PO4), and most likely plays an overwhelming role in the overall optical basicity of glasses.