光学学报, 2010, 30 (s1): s100105, 网络出版: 2010-12-22  

Ti4+掺杂β-Zn2SiO4微晶玻璃光谱特性研究

Optical Properties of Ti4+ Doped β-Zn2SiO4 Glass-Ceramic
作者单位
1 中国计量学院光学与电子科技学院, 浙江 杭州 310018
2 上海理工大学光电信息与计算机工程学院, 上海 200093
摘要
制备了宽带发光的Ti4+掺杂SiO2-Al2O3-ZnO-K2CO3 微晶玻璃。测试了微晶玻璃的X射线衍射谱、激发光谱和荧光光谱。研究发现,X射线衍射谱表明了玻璃基质中存在β-Zn2SiO4纳米晶粒,计算得到750 ℃处理2 h的β-Zn2SiO4晶粒大小约为25 nm。在紫外光激发下,观察到强烈的宽带发光(350~650 nm),为Ti4+的(3d0)-O2-(2s2 3p6)的电荷迁移跃迁所导致的发光。与原始玻璃相比,热处理后微晶玻璃的发光明显增强,750 ℃处理2 h对应的色坐标为 (0.242,0.363)接近白光。研究结果表明Ti4+掺杂的SiO2-Al2O3-ZnO-K2CO3微晶玻璃是一种潜在的LED基质材料。
Abstract
A novel Ti4+ doped SiO2-Al2O3-ZnO-K2CO3 is synthesized. Its X-ray diffraction (XRD) pattern, excitation spectrum and emission spectrum are measured and recorded at room temperature. The X-ray diffraction diffusion (XRD) data demonstrate that there are β-Zn2SiO4 nanocrystals in the glass substrate. Theory computation shows that the size of β-Zn2SiO4 nanocrystals is about 25 nm. Under 275 nm light excitation, the emission band (350~650 nm) originated from Ti4+ ion can be observed in Ti4+ doped glass ceramics. Compared with the precursor glass, upconversion luminescence enhances significantly in the glass ceramics. The CIE coordinate (x=0.242, x=0.363) of the Ti4+ doped glass ceramics heat-treated at 750 ℃ for two hours is close to the standard white-light illumination (X=0.333,Y=0.333). The results indicate that Ti4+ doped glass ceramics containing β-Zn2SiO4 nanocrystals can act as suitable materials for phosphor.

李晨霞, 叶仁广, 徐时清, 赵士龙, 邓德刚, 庄松林. Ti4+掺杂β-Zn2SiO4微晶玻璃光谱特性研究[J]. 光学学报, 2010, 30(s1): s100105. Li Chenxia, Ye Renguang, Xu Shiqing, Zhao Shilong, Deng Degang, Zhuang Songlin. Optical Properties of Ti4+ Doped β-Zn2SiO4 Glass-Ceramic[J]. Acta Optica Sinica, 2010, 30(s1): s100105.

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