TERBIUM DOPED PHOSPHATE-BASED GREEN LUMINESCENT MATERIAL AND PREPARATION METHOD THEREOF

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Terbium doped phosphate-based green luminescent material and preparation method thereof are provided. The chemical formula of the material is M3RE1-xTbx(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 M3RE1-xTbx(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.