EUROPIUM-ACTIVATED YTTRIUM PHOSPHATE NANO-PARTICLES, EUROPIUM-ACTIVATED YTTRIUM VANADATE NANO-PARTICLES, PHOSPHOR MADE OF THESE PARTICLES, AND METHOD FOR PRODUCING THEM

摘要

PROBLEM TO BE SOLVED: To provide a phosphor comprising fine particles which can be used for a color plasma display or the like, and particularly to provide europium-activated yttrium phosphate (YPO₄:Eu) nano-particles, europium-activated yttrium vanadate (YVO₄:Eu) nano-particles, a phosphor made of these particles, and a method for producing them.;SOLUTION: The method for producing europium-activated yttrium phosphate (YPO₄:Eu) nano-particles or europium-activated yttrium vanadate (YVO₄:Eu) nano-particles comprises the steps of preparing a solution A containing ammonium phosphate or vanadate and yttrium nitrate, preparing an aqueous solution B containing europium chloride and an alcohol, mixing the solution A and the solution B to prepare a solution C, adding an alkaline solution dropwise to the solution C for a predetermined period of time. There is also provided a phosphor comprising these particles.;COPYRIGHT: (C)2008,JPO&INPIT