SILICA-COATED ORANGE-RED FLUORESCENT POWDER AND PREPARATION METHOD THEREOF

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The present invention provides a silica-coated orange-red fluorescent powder, a stoichiometric equation thereof being (SrxM1-x-w)3(Si1-yGey)zO5 : REw@SiO2. In the equation, M is selected from one or more of Mg, Ca, Ba, Be, Zn, and Li; RE is Eu or a combination of Eu and another rare earth element; SiO2 is a coating material outside the fluorescent powder; and x, y, z, and w represent numerical values in the following ranges respectively and independently : 0

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