METHOD FOR PRODUCING LUMINOUS PHOSPHOR OF ULTRAFINE PARTICLE BY WET PROCESS

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a luminous phosphor of ultrafine particles by which the luminous fluorescent substance can be produced by baking a complex polymer made from a water-soluble metal salt as a starting raw material according to a wet process at a relatively low temperature though the particle diameter distribution is uniform without strong pulverization. SOLUTION: This method for producing the luminous phosphor of the ultrafine particles according to the wet process is carried out as follows. A compound composed of one or more kinds selected from metal elements constituting the matrix of the luminous phosphor and one or more kinds selected from metal elements constituting an activator of the luminous phosphor is reacted with a hydroxy acid or a polyamino agent. The resultant metal complex is then subjected to a polymerizing reaction with a polyol in a solvent of boric acid used as a flux and an alcohol to form a complex polymer. The formed complex polymer is subsequently baked at a low temperature within the range of 400-800 deg.C.