Ce^(3+)掺杂铝酸锌微晶玻璃的制备与发光性能研究

Preparation and luminescence properties of ZnAl_2O_4/SiO_2:Ce^(3+) glass ceramics by sol-gel method

采用溶胶-凝胶法成功制备Ce^(3+):Zn O-Al_2O_3-SiO_2(ZAS)微晶玻璃。通过X射线粉末衍射(XRD)、透射电镜(TEM)和荧光光谱仪(PL)系统研究了铈离子掺杂浓度与热处理温度对ZAS微晶玻璃的结构与发光性能的影响。结果表明,900℃热处理后在非晶基体中析出了平均晶粒尺寸为13nm的ZnAl_2O_4尖晶石纳米晶;ZAS微晶玻璃的荧光发射峰峰值位于381 nm,属于Ce^(3+)离子的5d→4f跃迁,当Ce^(3+)掺杂浓度为3%时发光性能达到最佳。

Transparent glass ceramics of Ce3＋ ：ZnO - Al2O3- SiO2（ZAS） were synthesized by a solgel method. X-ray diffraction （XRD）, transmission electron microscopy （TEM） and photoluminescence （PL） spectra were employed to study the influence of thermal treatment temperature and Ce3＋ concentration on the microstructure and luminescence properties of ZAS glass ceramics. The spinel ZnAl2O3 nano-crystals sized about 13 nm distribute homogeneously among the glass matrix after thermal treatment at 900℃. A violet emission centered at 381 nm corresponding to the 5d→4f transition of Ce3＋ ions is observed. Furthermore, the luminescence properties are the best, when Ce3＋ concentration is 3%.