Silicate luminescent material and preparation method therefor

A method for preparing a silicate luminescent material, comprising:

• adding silicon dioxide aerogel into a solution of salt of metal M according to molar ratio of M to Si which defined as y, mixing and stirring uniformly said silicon dioxide aerogel and said solution of salt of metal M at 50° C. to 75° C. to obtain mixture solution, sonicating said mixture solution, drying the mixture solution obtained from sonicating at 60° C. to 150° C., grinding mixture solid obtained from drying uniformly, calcining said mixture solid at 600° C. to 1200° C. to obtain silicon dioxide aerogel containing M ion, said M is selected from at least one of Ag, Au, Pt, Pd, and Cu metal nanoparticles, y has a value range of 0<y≦1×10−2;
• weighing source compound of Li, source compound of Ca, source compound of Tb and said silicon dioxide aerogel containing M ion according to molar ratio of Li, Ca, Tb and Si elements at 2:(1−x):x:1, mixing and grinding uniformly to obtain mixture material, x has a value range of 0<x≦0.2;
• and
• calcining said mixture material at 500° C. to 1000° C., and reducing said mixture material under reducing atmosphere at 800° C. to 1200° C., cooling mixture material obtained from reducing to room temperature, grinding to obtain silicate luminescent material has a general molecular formula of Li2Ca1-xSiO4:Tbx,My, of which Tb and M are doped particles that doped in Li2Ca1-xSiO4.