Preparation method and use of yellow fluorescent glass ceramic

A preparation method of a yellow fluorescent glass ceramic, comprising the following steps:

• (1) a slurry preparation:
• mixing a monomer, a cross-linking agent and a filling solvent evenly to obtain a mixed solution;
• then adding fumed silica to the mixed solution to obtain a first mixture, and stirring the first mixture evenly, wherein a volume ratio of the fumed silica to the mixed solution is 3:7 to 5:5;
• further adding 0.05-1 wt % of an ultraviolet (UV) photoinitiator and 0.002-0.05 wt % of a UV absorber to the first mixture to obtain a second mixture, and stirring the second mixture thoroughly;
• finally adding a yellow phosphor (Y,Gd) AG:
• Ce to the second mixture to obtain a third mixture, stirring thoroughly and defoaming the third mixture to obtain a slurry, wherein a mass ratio of the yellow phosphor to the fumed silica is 1:100 to 15:100, wherein the monomer comprises at least one selected from the group consisting of hydroxyethyl acrylate and 4-hydroxybutyl acrylate, wherein the cross-linking agent comprises polyethylene glycol 400 dibenzoate, and wherein the average particle size of the fumed silica is 10 nm;
• (2) a curing:
• introducing the slurry into a mold with a predetermined shape, and curing the slurry by an irradiating with an UV lamp for 20-60 s;
• (3) a degreasing:
• putting the body into a high-temperature furnace, heating the body to 600-1,000° C., holding the body in air for 1-10 h to fully decompose and discharge organic matter, and obtaining a phosphor-embedded porous silica glass as a porous precursor;
• (4) a sintering:
• putting the porous precursor in a high-temperature vacuum furnace, and performing a densification and the sintering on the porous precursor at 1,050-1,300° C. under vacuum for 0.5-6 h to obtain a densified fluorescent glass ceramic;
• and
• (5) a polishing:
• cutting and surface-polishing the densified fluorescent glass ceramic to obtain the yellow fluorescent glass ceramic with a predetermined size.