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采用溶胶-凝胶技术 ,制备了不同退火温度下掺 Tb3＋的 SiO2玻璃 ,掺 Tb3＋的凝胶玻璃在 448,544,585,620 nm显示 Tb3＋的 5D4- 7FJ(J=3,4,5,6)的特征发光光谱 .通过不同退火温度下样品的激发光谱、发射光谱、红外光谱、远红外光谱及差热-热重谱研究了掺 Tb3＋的硅基材料由凝胶向玻璃转变过程中的结构变化及对 Tb3＋发光性能的影响 .结果显示 ,在 50～ 100℃退火温度下 ,凝胶大部分吸附水分子被除去 ,在 150～ 500℃退火温度区 ,是凝胶向玻璃转变的主要结构变化区 ,并且其发光强度也明显增加 ,到 800℃时趋于稳定 .这些现象得出一个结论 ,Tb3＋的发光跃迁被 O－ H基强烈猝灭而随退火温度的升高而加强 .
The Tb3 + -doped SiO2 glass with different annealing temperatures was prepared by sol-gel technique. The characteristic luminescence spectra of Tb3 + -doped 5D4-7FJ (J = 3,4,5,6) were shown at 448,544,585,620 nm. The structure change of Tb3 + -doped silicon-based material during the transformation from gel to glass and the effect on Tb3 + luminescence properties were studied by means of excitation, emission, IR, FTIR and TG-DSC at different annealing temperatures The results showed that most of the adsorbed water molecules were removed at the annealing temperature of 50-100 ° C and the main structural change region of the gel-to-glass transition at the annealing temperature of 150-500 ° C, and the luminescence intensity Also increased obviously and stabilized at 800 ° C. These phenomena led to the conclusion that the luminescent transition of Tb 3+ is quenched strongly by O-H groups and strengthened with the increase of annealing temperature.