Production of substantially monodisperse phosphor particles

A method for producing activated, substantially monodisperse, phosphorescent particles comprising the steps of:

• suspending substantially monodisperse, phosphor-precursor particles in an inert fluidizing gas;
• introducing a reactive gas to contact the suspended phosphor-precursor particles;
• heating the suspended phosphor-precursor particles to a reaction temperature sufficient to form unactivated phosphorescent particles;
• and
• activating the unactivated phosphorescent particles suspended within the fluidizing gas by heating the unactivated phosphorescent particles to an activation temperature to form activated, substantially monodisperse, phosphorescent particles having a particle size of less than about 10 microns, and wherein the activation temperature is greater than or equal to the reaction temperature.

A method for producing activated, substantially monodisperse, phosphorescent particles comprising the steps of:

• suspending substantially monodisperse, phosphorescent-precursor particles in an inert fluidizing gas;
• heating the suspended phosphorescent-precursor particles to a reaction temperature sufficient to decompose the phosphorescent-precursor particles and form unactivated phosphorescent particles;
• and
• activating the unactivated phosphorescent particles suspended within the fluidizing gas by heating the unactivated phosphorescent particles to an activation temperature to form activated, substantially monodisperse, phosphorescent particles having a particle size of less than about 10 microns, and wherein the activation temperature is greater than or equal to the reaction temperature.