Patent ID: 10323184

Abstract:
A method of producing a nitride fluorescent material having a high light emission intensity and including a calcined product having a composition represented by formula MavMbwMcxMdyNz is provided. Ma is at least one element selected from Sr, Ca, Ba, and Mg; Mb is at least one element selected from Li, Na, and K; Mc is at least one element selected from Eu, Mn, Tb, and Ce; Md is at least one element selected from Al, B, Ga, and In; v, w, x, y, and z satisfy 0.8≤v≤1.1, 0.8≤w≤1.1, 0.001<x≤0.1, 2.0≤y≤4.0, and 3.0≤z≤5.0, respectively. The nitride fluorescent material includes elemental oxygen in a range of 2% or more and 4% or less by mass. The method includes mixing the calcined product with a polar solvent having a relative dielectric constant in a range of 10 or more and 70 or less at 20° C.