The invention provides Ce:YAG
microcrystalline glass capable of achieving yellow
luminescence under the condition of
blue light excitation and a preparation method of the Ce:YAG
microcrystalline glass, and Ce:YAG
fluorescence microcrystals are inlaid uniformly in an
oxide glass matrix of the
microcrystalline glass. The microcrystalline glass comprises glass components in percentage by mole as follows: 0-10 mol% of SiO2, 0-40 mol% of GeO2, 20-60 mol% of TeO2, 0-25 mol% of B2O3, 0-15 mol% of P2O5, 0-10 mol% of Al2O3, 0-20 mol% of Ae2O, 0-20 mol% of ZnO, 0-15 mol% of BaO, 0-20 mol% of Sb2O3, 0-20 mol% of La2O3 and 0-10 mol% of Bi2O3, wherein Ae is selected from Li, Na or K; and the content of Ce:YAG microcrystals is 1-15 wt% of the
oxide glass matrix. The invention further provides a preparation method for the microcrystalline glass. The microcrystalline glass provided by the invention can emit yellow light under the excitation of
blue light, the yellow light and the
blue light are combined to generate intense
white light, and accordingly, the microcrystalline glass and the method can be used for development and application of construction of the
white light LED which is excited by a blue light
chip.