Preparation of red phosphor particles for PDP by spray pyrolysis

摘要

PURPOSE: A method for preparing a red fluorescent substance for PDP by spray pyrolysis and a red fluorescent substance for PDP prepared by the method are provided, to improve the shape of fluorescent substance powder and the brightness. CONSTITUTION: The method comprises the steps of dissolving a precursor which composes a fluorescent body capable of being dissolved in an aqueous alcohol, an active precursor doping the body and flux whose ratio of metal halides to carbonates is 1:0.1-40 by weight, into distilled water, respectively, to prepare 0.02-2 M fluorescent substance particle precursor solution; injecting the fluorescent substance particle precursor solution into a spraying machine to generating a liquid drop with a diameter of 0.1-100 micrometers; and injecting the liquid drop into a reactor of 200-1,500 deg.C to prepare a powdered fluorescent substance. The fluorescent substance is represented by (YxGd(1-x-y))BO3:Euy, wherein 0=x=1, and 0.01 =y=0.1.