Patent ID: 9139769
Filing Date: 2015-09-22
Classification: C09K,H01L,H05B

Abstract:
1. A method of producing β-Sialon that contains Eu 2+ in a β-Sialon host crystal expressed as Si 6-z Al z O z N 8-z (0.3≦z≦1.5) and as a light emission center, the method comprising: mixing one or more types of oxide selected from aluminum oxide and silicon oxide; silicon nitride; aluminum nitride; europium oxide or europium salt that turns to be europium oxide by heating; and a β-Sialon seed to obtain a β-Sialon mixed material, heating the β-Sialon mixed material in a nitrogen atmosphere to obtain a sintered body; crushing the sintered body to obtain a crushed sintered body; heating the crushed sintered body in a noble gas atmosphere or in vacuum to obtain a heated body; and treating the heated body by acid, wherein: