Germanate luminescent material and preparation method therefor
AssigneeOcean's King Lighting Science & Technology Co., Ltd.
InventorsMingjie Zhou, Rong Wang
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Abstract
The present invention provides a germanate luminescent material, a general molecular formula thereof being Zn2-2xGeO4:Mn2x,My, wherein M is selected from at least one of Ag, Au, Pt, Pd, and Cu metal nano particles; 0<x≦0.05; M is doped in Zn2-2xGeO4:Mn2x, and y is a molar ratio of M to Zn2-2xGeO4:Mn2x, 0<y≦1×10−2. The metal nano particle M is doped in a germanate luminescent substrate of the germanate luminescent material, and the metal nano particle M improves internal quantum efficiency of the luminescent material so that the germanate luminescent material has a high luminescent intensity. Also provided is a preparation method for the germanate luminescent material.
Claims7
A method for preparing a germanate luminescent material, comprising:
- preparing a colloid containing M, wherein M is at least one of Ag, Au, Pt, Pd and Cu nanoparticles;
- preparing an aqueous solution of ethanol containing Zn ions, Ge ions and Mn ions according to a stoichiometric ratio of corresponding elements in the chemical formula of Zn2-2xGeO4:Mn2x, x is in a range of 0<x≦0.05, y is a molar ratio of M to Zn2-2xGeO4:Mn2x and y is in a range of 0<y ≦1×10−2, followed by adding citric acid and the colloid containing M to obtain a mixture, then stirring the mixture at 60° C.-80° C. for a period of 2-6 hours to prepare a precursor;
- drying the precursor to obtain a gel, then grinding and pre-calcining the gel at 400° C.-600° C. for a period of 1-6 hours to obtain solid matters;
- calcining the solid matters at 600° C.-1400° C. for a period of 2-10 hours, then cooling to obtain a germanate luminescent material having a general chemical formula of Zn2-2xGeO4:Mn2x which further contains M.
Dependencies are inferred from the claim text.