掺钕氟氧化物玻璃陶瓷的制备及表征

Preparation and Characterization of Neodymium-doped Oxyfluoride Glass-ceramics

采用熔融和晶化技术合成出含CaF2微晶的Nd^3＋离子掺杂透明氟氧化物玻璃陶瓷材料，并通过DTA，XRD，FEG—ESEM和UV—Vis—Nir分光光度计和傅里叶变换荧光光谱仪等对样品进行了表征．结果表明，玻璃陶瓷主晶相为CaF2，晶相粒径为15nm；可见光透过率为78％～87％，近红外透过率为84％～93％；由于Nd^3＋在热处理后优先富集在具有低声子能量的CaF2晶相中，从而改变了配体场，使荧光谱线在1060nm处的峰值比原始玻璃强度大．

Nd^3＋ -doped transparent oxyfluoride glass ceramics containing CaF2 was prepared through controlled crystallization of melt-quenched glass. The sample is characterized by DTA, XRD and FEG-ESEM. The result indicates that the main phase of crystal is CaFEand the crystalline particle size is 15 nm. The optical transmittance is about 78%-87% in the visible region and 84%-93% in the near-infrared region. Fluorescence measurements exhibit a stronger emission especially at 1060 nm in the glass ceramics than in the precursor glass, and a larger excited emission section value than the precursor glass, due to the incorporation of Nd^3＋ into CaF2 during the crystallization.