Transparent glass ceramic that emits white light and method for preparing the same

摘要

A transparent glass ceramic emitting white light and preparation method thereof are provided. The chemical formula of the transparent glass ceramic is aSiO 2 ·bAl 2 O 3 ·cNaF·dCeF 3 ·xDyF 3 , wherein a, b, c, d, and x are mole fractions, a is 35ˆ¼50, b is 15ˆ¼30, c is 5ˆ¼20, d is 5ˆ¼20, x is 0.01ˆ¼1, and a+b+c+d=100. The transparent glass ceramic can be substituted for the combination of epoxy resin or silica gel and fluorescent powder to seal LED. The transparent glass ceramic has strong excitation spectrum with broadband at ultraviolet area, and can emit strong white light under the excitation of ultraviolet light.