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通过熔融法制备了掺杂CeO2和Nd2O3的Li2O-Al2O3-SiO2（LAS）透明微晶玻璃,利用差热分析仪、X射线衍射仪、扫描电镜、紫外可见分光光度计等检测技术,研究稀土掺杂对Li2O-Al2O3-SiO2（LAS）玻璃析晶行为以及微晶玻璃的微观结构和光学性能的影响。稀土掺杂明显提高玻璃的析晶活化能和晶化温度,抑制了微晶玻璃由石英固溶体向锂辉石固溶体的转变,使LAS微晶玻璃的热稳定性增强。微晶玻璃晶化后紫外吸收边出现＂红移＂,掺杂稀土的微晶玻璃晶粒出现细化。稀土离子的能级跃迁,导致微晶玻璃的颜色发生变化,并在晶界光散射和晶格光吸收的共同作用下,使微晶玻璃的透过率降低。

Transparent Li2O-Al2O3-SiO2（LAS） glass-ceramics doped with CeO2 and Nd2O3 were prepared by the melting method.The effects of rare earth ions on the crystallization behavior,microstructure and optical properties of Li2O-Al2O3-SiO2 glass-ceramics were studied by differential thermal analysis,X-ray diffraction,scanning electron microscopy and ultraviolet-visible spectroscopy.The results show that the activation energy of crystallization process and the crystallization temperature increases with rare earth doping,and the phase transition from β-quartz to β-spodumene is suppressed,and the thermal stability of glass-ceramics is enhanced.The UV absorption edge of LAS glass-ceramics is red-shifted compared to their parent glass.The grain refinement is observed with rare earth doping.The color of glass-ceramics is changed due to the energy-level transition of rare earth ions.The transmittance of LAS glass-ceramics is smaller than their parent glass,owing to light scattering by the grain boundary as well as the lattice absorption.