论文标题
混合氧气氟化物玻璃中PBF2纳米颗粒结晶机理的研究
A study of PbF2 nanoparticles crystallization mechanism in mixed oxyde-fluoride glasses
论文作者
论文摘要
已经使用小角度X射线散射和衍射，研究了具有不同含量的Thulium tm3+和Holmium HO3+离子的热处理的氧氟化物玻璃。随着添加HO2O3和TM2O3氧化物的相对浓度的增加，观察到纳米颗粒的平均大小以及玻璃基质中局部密度波动的增长。另外，在高度相对浓度的初始稀土氧化物中，观察到结晶立方相PBF2：TM-HO的出现，可以在研究的玻璃材料中提供上转化发光的来源。初始HO2O3和TM2O3氧化物的浓度变化不影响形成的发光纳米颗粒的形态和分形维度。讨论了纳米颗粒形成的结构方面，并讨论了上转化发光现象。
The heat-treated oxyfluoride glasses with different contents of thulium Tm3+ and holmium Ho3+ ions have been studied using small-angle X-ray scattering and diffraction. With an increase in relative concentration of added Ho2O3 and Tm2O3 oxides, the growing in the average size of both nanoparticles and local density fluctuations in the glass matrix is observed. In addition, at high relative concentrations of initial rare-earth oxides, the appearance of a crystalline cubic phase PbF2:Tm-Ho is observed, which can provide a source of up-conversion luminescence in the studied glass materials. A change in the concentration of the initial Ho2O3 and Tm2O3 oxides does not effect on a morphology and fractal dimension of the formed luminescence nanoparticles. The structural aspects of nanoparticle formation with up-conversion luminescence phenomenon are discussed.
