| abstract |
A mixing step of mixing at least one of aluminum oxide or silicon oxide, silicon nitride, aluminum nitride, and a europium compound, and the mixture after the mixing step is fired at a temperature exceeding 1950 ° C. and not exceeding 2200 ° C. for not less than 10 hours This is a method for producing β-sialon, which includes a firing step and a heat treatment step in which heat treatment is performed in an atmosphere of an inert gas other than nitrogen at 1300 ° C. to 1600 ° C. and a partial pressure of 10 kPa or less after the firing step. |