Terbium doped phosphate-based green luminescent material and preparation method thereof

摘要

Terbium doped phosphate-based green luminescent material and preparation method thereof are provided. The chemical formula of the material is M₃RE_1-xTb_x(PO₄)₃, wherein, M is alkaline-earth metals, RE is rare-earth elements, x is in a range of 0.001 to 1. The preparation method of the material includes the following steps; providing the compound used as the source of alkaline earth metal, the compound used as the source of phosphate, the compound used as the source of rare-earth, and the compound used as the source of Tb³⁺ according to the molar ratio of the elements in M₃RE_1-xTb_x(PO₄)₃, wherein, the compound used as the source of phosphate is added at excess molar ratio in a range of 10% to 30%; mixing and grinding the compound to get mixture; sintering the mixture as pre-treatment, and then cooling the mixture to get a sintered matter; grinding; calcining in reducing atmosphere, and then cooling them.