Tb^(3+)掺杂含SrF_2纳米晶硅酸盐微晶玻璃的光谱性质

Spectroscopic Properties of Tb^(3+) Doped Silicate Glass Ceramics Containing SrF_2 Nanocrystals

通过高温熔融法和后续热处理制得Tb^(3+)掺杂含SrF_2纳米晶的透明硅酸盐微晶玻璃。利用X射线衍射(XRD)、透射电子显微镜(TEM)、紫外可见透过光谱、荧光光谱、荧光寿命和X射线激发发光光谱(XEL)探讨了基础玻璃和微晶玻璃的结构和光谱特性。XRD结果表明,玻璃中析出晶体为SrF_2纳米晶,衍射峰随着热处理温度的升高和时间的延长而逐渐明显,晶粒也随热处理温度的升高和时间的延长越来越大。在376 nm紫外光和X射线激发下,与基础玻璃相比,微晶玻璃发光显著增强,且发光强度随热处理温度的升高和时间的延长而逐渐增强。

Tb^＋ doped transparent fluorosilicate glass ceramics containing SrF2 nanocrystals were prepared by melt-quenching method with subsequent heat treatment. The structure and luminescence properties of the as-made glass and glass-ceramics were investigated by X-ray diffraction（XRD）,transmission electron microscope（TEM）,transmittance spectra,photoluminescence spectra,fluorescence lifetime and X-ray excited luminescence spectra（XEL）. The XRD results show that the precipitated crystalline in the glass matrix is SrF_2 nanocrystal. The diffraction peaks become obvious and the crystal gradually increases with the increasing of the heat treatment temperature and time.Under 376 nm light and X-ray,much more intense emissions are observed in Tb^＋ doped oxyfluoride glass ceramics containing SrF2 nanocrystals compared with the as-made glass. With the increasing of the heat-treatment temperature and time,the emission intensities are enhanced.