FLAKE TYPE SILICON-OXYNITRIDE PHOSPHOR AND ITS MANUFACTURING METHOD

• Main Authors: WON, CHANG WHAN, WON, HYUNG IL
• Format: Patent
• Language: English; Korean
• Published: 19.04.2012
• Subjects: ADHESIVES; CHEMISTRY; DYES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES

PURPOSE: Silicon oxynitride-based phosphors are provided to have light-emitting region distributed from blue-green to yellow according to the kind and concentration of alkaline earth metals and rare earth metals, and to have excellent specific surface area, thereby having high luminous efficiency to weight. CONSTITUTION: A manufacturing method of silicon oxynitride-based phosphors having chemical formula: (Me_(1-x)Re_x)3Si_6O_(15-3y)N_2y comprises: a step of offering alkaline earth metal oxide, rare earth metal oxide, alkali earth metal halogenide, silicon source, and reacted mixture of a reducing agent; and a step of self-propagating combustion reacting the reacted mixture under nitrogen atmosphere inside a high pressure reactor. In chemical formula, Me is alkaline earth metal, Re is rare earth metal, Si is silicon, O is oxygen, N is nitrogen, and 0<x<1, 0<y<5. .