光谱学与光谱分析 |
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Preparation and Luminescence Properties of Tb3+ Ion and Na2WO4 Co-Doped SiO2 Materials |
WANG Xi-gui1,LI Xia1,2 |
1. Chemistry & Environment Science College of Inner Mongolia Normal University, Hohhot 010022, China 2. Rare Earth College of Inner Mongolia University of Science and Technology, Baotou 014010, China |
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Abstract Tb3+ and Na2WO4 co-doped SiO2 materials were prepared by sol-gel method and the structure of materials were measured by DTA-TG, IR and XRD techniques. The results indicate that the materials were in amorphous phase and the Si—O—Si bond was still observed in samples annealed at 800 ℃. The influence of Na2WO4 on luminescence properties of terbium glasses was investigated by three-dimension fluorescence spectra, excitation and emission spectra. It is approve that when sample excited by 230 nm showed the characteristic emission peaks of terbium corresponding to 5D4—7Fj(j=4, 5, 6) and 5D3—7Fj(j=4, 5, 6) transitions. Doping Na2WO4 has less influence with the emission position of SiO2 materials with terbium, but has a great effect with the emission intensity. It is find that the blue transition of 5D4—7F6 was activated and the green transition of 5D4—7F5 was quenched and the materials radiate green blue fluorescence light under ultraviolet light. The mechanism of sample was analyzed by the energy levels of Tb3+ and Na2WO4 co-doped glasses.
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Received: 2006-10-06
Accepted: 2007-01-09
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Corresponding Authors:
WANG Xi-gui
E-mail: Lixia-82@163.com
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