METHOD FOR SYNTHESIZING PHOSPHORESCENT OXIDE NANOPARTICLES

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A method for producing activated substantially monodisperse, phosphorescent oxide particles with rare earth element dopants uniformly dispersed therein by mixing a rare earth element dopant precursor powder with an oxide-forming host metal powder to form a solid-phase precursor composition; vaporizing the solid-phase precursor composition; combining the vaporized precursor with an inert carrier gas; contacting the inert carrier gas and the vaporized precursor with a flame fueled by a reactive gas; and uniformly heating the vaporized precursor in the flame to a reaction temperature sufficient to form activated phosphorescent oxide nanoparticles.