Preparation and photoluminescence of Eu-doped oxyfluoride borosilicate glass ceramics
Eu-doped transparent oxyfluoride borosilicate glass ceramics containing Ba2GdF7 nanocrystals were prepared by controlling crys-tallization of melt-quenched glass fabricated under a reductive atmosphere.In the oxyfluoride borosilicate glass ceramics,the mean crystal size of Ba2GdF7 nanocrystals was a...
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| Published in: | Journal of rare earths Vol. 30; no. 1; pp. 6 - 9 |
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| Main Author: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
Elsevier B.V
2012
College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China |
| Subjects: | |
| Online Access: | Get full text |
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| Summary: | Eu-doped transparent oxyfluoride borosilicate glass ceramics containing Ba2GdF7 nanocrystals were prepared by controlling crys-tallization of melt-quenched glass fabricated under a reductive atmosphere.In the oxyfluoride borosilicate glass ceramics,the mean crystal size of Ba2GdF7 nanocrystals was about 30 nm,which could be observed by X-ray diffraction（XRD） and transmission electron microscopy analysis.The photoluminescence spectra of the samples excited at 392 nm showed that,besides the characteristic sharp emissions of Eu3＋ ions,a very intense broadband emission of Eu2＋ ions centered at 450 nm appeared.The photoluminescence intensity of Eu3＋ and Eu2＋ ions in the glass ceramics was much stronger than that in the as-made precursor.The long decay lifetimes of Eu3＋ and Eu2＋ ions evidenced the partitions of Eu3＋ and Eu2＋ ions into the Ba2GdF7 nanocrystals.The energy transfer from Gd3＋ ions to Eu3＋ and Eu2＋ ions was confirmed by the excita-tion and emission spectra. |
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| Bibliography: | 11-2788/TF XIN Fengxia,ZHAO Shilong,XU Shiqing,JIA Guohua,DENG Degang,WANG Huanping,HUANG Lihui（College of Materials Science and Engineering,China Jiliang University,Hangzhou 310018,China） Eu-doped transparent oxyfluoride borosilicate glass ceramics containing Ba2GdF7 nanocrystals were prepared by controlling crys-tallization of melt-quenched glass fabricated under a reductive atmosphere.In the oxyfluoride borosilicate glass ceramics,the mean crystal size of Ba2GdF7 nanocrystals was about 30 nm,which could be observed by X-ray diffraction（XRD） and transmission electron microscopy analysis.The photoluminescence spectra of the samples excited at 392 nm showed that,besides the characteristic sharp emissions of Eu3＋ ions,a very intense broadband emission of Eu2＋ ions centered at 450 nm appeared.The photoluminescence intensity of Eu3＋ and Eu2＋ ions in the glass ceramics was much stronger than that in the as-made precursor.The long decay lifetimes of Eu3＋ and Eu2＋ ions evidenced the partitions of Eu3＋ and Eu2＋ ions into the Ba2GdF7 nanocrystals.The energy transfer from Gd3＋ ions to Eu3＋ and Eu2＋ ions was confirmed by the excita-tion and emission spectra. optical materials and properties; photoluminescence; glass ceramics; rare earths ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
| ISSN: | 1002-0721 2509-4963 |
| DOI: | 10.1016/S1002-0721(10)60628-X |