Ti^(4+)掺杂硼硅酸盐微晶玻璃的光谱特性

Optical Properties of Ti^(4+) Doped Glass Ceramics

制备了Ti4+掺杂硼硅酸盐玻璃,根据玻璃样品的差热分析(DTA)进行微晶化处理,测试了Ti4+掺杂硼硅酸盐微晶玻璃的X射线衍射(XRD)谱、透射电镜(TEM)图像、吸收光谱和发射光谱。根据Scherrer公式计算了BaYF5微晶的平均晶粒尺寸并与TEM图像进行比对。在紫外光激发下,观察到Ti4+掺杂BaYF5硼硅酸盐微晶玻璃强烈的宽带发光(300~800 nm),对应于Ti4+(3d0)-O2-(2s23p6)的电荷迁移跃迁,与未经热处理玻璃样品相比,微晶玻璃的发光强度增强。通过优化热处理温度和掺杂浓度,得到了紫外光激发下发白光的Ti4+掺杂BaYF5硼硅酸盐玻璃,对应的色坐标为(0.261,0.351)。

Ti4＋doped borosilicate glass has been prepared.The as-made glass was heat-treated and crystallized.X-ray diffraction（XRD）,TEM,absorption spectrum and emission spectrum of glass ceramics were measured.Crystallite size of BaYF5 glass ceramics were calculated by Scherrer formula and the comparing with the result of TEM.White emission band（300~800 nm） originated from the charge transferring of Ti4＋（3d0）-O2-（2s2 3p6） can be observed in Ti4＋ doped borosilicate glass ceramics.Comparing with the as-made glass,significantly increased luminescence was observed in the glass ceramics.By optimizing the heat treat temperature and concentration of Ti4＋,borosilicate glass ceramics with CIE coordinate（0.261,0.351） can be obtained which is close to the standard white-light illumination（0.333,0.333）.