Metal nanoparticle-coating silicate luminescent material and preparation method therefor
AssigneesOcean's King Lighting Science & Technology Co., Ltd., Shenzhen Ocean's King Lighting Engineering Co., Ltd.
InventorsMingjie Zhou, Rong Wang, Guitang Chen
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Abstract
Disclosed is a metal nanoparticle-coating silicate luminescent material, which has a molecular formula of Li2Ca1−xSiO4:Tbx@My; where @ represents a coating, M is at least one among Ag, Au, Pt, Pd, and Cu nanoparticles, where 0<x≦0.2, where y is the molar ratio between M and Si, and where 0<y≦1×10−2. The composition of the silicate coated metal nanoparticle luminescent material is metal nanoparticles coated with Li2Ca1−xSiO4:Tbx, all of which are substances having great chemical stability and having great stability when bombarded by large electron beams. Also provided in the present invention is a method for preparing the metal nanoparticle coating silicate luminescent material.
Claims10
A luminescent material having the molecular formula of:
- Li2Ca1−xSiO4:Tbx@My;
- wherein @ represents a coating, M is a metal nanoparticle core and is at least one of Ag, Au, Pt, Pd, and Cu, 0<x≦0.2, y is the molar ratio of M and Si, 0<y≦1×10−2.
A method of preparing a luminescent material, comprising the steps of:
- preparing a colloid containing a metal nanoparticle (M), wherein said metal nanoparticle is at least one of Ag, Au, Pt, Pd, and Cu;
- surface processing said colloid containing a metal nanoparticle, then adding anhydrous ethanol, deionized water and ammonia, mixing evenly and while stirring, adding tetraethylorthosilicate on the basis of the molar ratio, y, of M and Si, wherein 0<y≦1×10−2 and reacting the same to produce SiO2@My powder which is separated from the mixture;
- weighing, on the basis of the stoichiometric ratio, the compounds corresponding to Li, Ca and Tb, and SiO2@My, mixing evenly, thermally processing the mixture, and
- subjecting the thermally processed mixture to thermal reduction in a reducing atmosphere, acquiring Li2Ca1−xSiO4:Tbx@My when cooled;
- where 0<x≦0.2, @ represents a coating, M is a nanoparticle core selected from at least one among of Ag, Au, Pt, Pd, and Cu nanoparticles.
Dependencies are inferred from the claim text.