Patent ID: 8945461
Filing Date: 2015-02-03
Classification: C01B,C01P,C04B,C09K

Abstract:
1. A production method of a β-sialon phosphor that europium ions are solid-solved in β-sialon, comprising: a mixing process for mixing raw materials of the β-sialon phosphor; a burning process for burning the raw materials after the mixing process to form the β-sialon phosphor; a HIP treatment process in which the β-sialon phosphor after the burning process is subjected to a HIP (Hot Isostatic Pressing) treatment; an annealing process in which the β-sialon phosphor after the HIP treatment process is subjected to an annealing treatment; and an acid treatment process in which the β-sialon phosphor after the annealing process is subjected to an acid treatment, wherein: the HIP treatment process is carried out at 2250° C. to 2550° C., and the annealing process is a process that the β-sialon phosphor is placed under an inactive gas atmosphere comprising mainly of a gas other than nitrogen at 1350° C. to 1650° C., or a process that it is placed in vacuum at 1200° C. to 1550° C.