Preparation method of cerium-doped rare earth silicate polycrystalline powder

The present invention provides a preparation method of a cerium-doped rare earth silicate polycrystalline powder, and belongs to the technical field of preparation technologies of a rare-earth compound luminescent powder. The preparation method solves the technical problems that in the preparation process of an existing cerium-doped rare earth silicate polycrystalline powder, organic solvents areused, impurity elements are easy to introduce, the operation process is complicated, the reaction period is long, and the performance, such as light output, of a subsequent lutetium silicate crystal material is affected. According to the preparation method for the cerium-doped rare earth silicate polycrystalline powder provided by the present invention, sodium metasilicate is employed as a siliconsource, ammonia water or ammonium carbonate is taken as a precipitating agent, homogeneous co-precipitation is carried out for obtaining a mixed rare earth silica gel and a precipitation precursor, and finally calcination is