Tb~(3+)掺杂含SrF_2纳米晶硅酸盐微晶玻璃的光谱性质

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。

Spectroscopic Properties of Tb3+ Doped Silicate Glass Ceramics Containing SrF2 Nanocrystals

Tb3+doped transparent fluorosilicate glass ceramics containing SrF2 nanocrystals were pre-pared 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, fluo-rescence lifetime and X-ray excited luminescence spectra ( XEL ) . The XRD results show that the precipitated crystalline in the glass matrix is SrF2 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 Tb3+ 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.