PRODUCTION OF BLUE LUMINESCENT OXIDE PHOSPHOR BY SPRAY THERMAL DECOMPOSITION METHOD

摘要

PURPOSE: A process of preparing aluminate series multicomponent oxide phosphors by a spray thermal decomposition method for spraying fine droplets of a mixture solution using an aerosol generator and manufacturing fine powder by drying and thermal decomposition are provided which produce phosphors causing no coagulation and having crystallinity and luminescence characteristics. CONSTITUTION: The process for producing the titled phosphors comprises preparing 0.02 to 0.2M oxide phosphor particle precursor solution by dissolving each host and an activator that is poured in the host as a doping material in distilled water; spraying fine droplets of the precursor solution of obtained oxide phosphor particles with a diameter of 1 to 20 micrometer using a filter expansion aerosol generator or an ultrasonic wave thermal decomposition apparatus; and converting the droplets to phosphor particles by drying, decomposition, reaction and crystallization of the droplets in the ultrasonic wave thermal decomposition apparatus.