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Citation: Wang Xi-Gui, Wu Hong-Ying, Weng Shi-Fu, Wu Jin-Guang. Synthesis and Luminescent Properties of Tb-doped SiO₂-B₂O₃-NaF Glass[J]. Acta Physico-Chimica Sinica, ;2003, 19(05): 398-402. doi: 10.3866/PKU.WHXB20030504 shu

Synthesis and Luminescent Properties of Tb-doped SiO₂-B₂O₃-NaF Glass

1.
Department of Chemistry, Inner Mon lia Normal University, Huhhot　010022;State Key Laboratory of Rare Earth Materials Chemistry and Application, College of Chemistry and Molecular Engineering, Peking University, Beijing　100871

Received Date: 29 August 2002
Available Online: 15 May 2003

Tb-doped SiO2-B2O3-NaF glass was prepared by sol-gel process,using tetraethoxy silcane, boric acid and sodium fluoride as precursors,0.10 mol•L－1 TbCl3 solution as the dopant. The luminescent properties of Tb3＋ doped SiO2-B2O3-NaF phosphors were investigated. The phosphors showed prominent luminescence in green, due to the electronic transition of 5D4—7F5 (Tb3＋).For all Tb3＋ concentrations used the emission spectrum was essentially the same with the exception of intensity and weak peak belonging to transition from 5D3 was detected in lower Tb3＋ doped samples and lower annealing temperature samples. The intensity of emission from 5D3 quenches with increasing of the Tb3＋ concentration and annealing temperature. The observation showed that cross-relaxation obviously took place in the transition 5D3－5D47F6—7F0 and/or 5D3—7F07F6—5D4.The excitation spectra of Tb3＋ emission in SiO2-B2O3-NaF glass consist of broad bands with a maximum at about 230 nm, corresponding to 4f 8—4f 75d 1 transition of Tb3＋ ion, and a series of sharp lines in the range of 300 to 380 nm which belong to transitions between the energy levels of the 4f 8 configuration. The structural characterization of these luminescent materials were carried by using XRD and TEM. The results showed that the phosphor was in amorphous phase.
- Tb^3＋;Luminescent property;SiO₂-B₂O₃-NaF glass
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沈阳化工大学材料科学与工程学院沈阳 110142

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Synthesis and Luminescent Properties of Tb-doped SiO2-B2O3-NaF Glass

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通讯作者: 陈斌, bchen63@163.com

Synthesis and Luminescent Properties of Tb-doped SiO₂-B₂O₃-NaF Glass