Patent ID: 11377594

Abstract:
A β-type sialon phosphor represented by the following expression 1, in which D50 is 10 μm or less, and values of D10, D50, and D90 satisfy a relationship of the following expression 2 with respect to D10, D50, and D90 (each unit is [μm]) on a volume frequency basis as measured according to a laser diffraction/scattering method. Expression 1: Si12-aAlaObN16-b:Eux (wherein 0<a≤3; 0<b≤3; 0<x≤0.1), expression 2: (D90−D10)/D50<1.6 (wherein the D10, D50, and D90 (each unit is [μm]) on a volume frequency basis as measured according to the laser diffraction/scattering method.