METHOD OF PRODUCING OXYNITRIDE PHOSPHOR

• Main Authors: NOMIYAMA TOMOHIRO, OKUZONO TATSUYA, MIYAZAKI MASARU
• Format: Patent
• Language: English; Japanese
• Published: 01.03.2021
• Subjects: ADHESIVES; CHEMISTRY; DYES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES

To provide a method of producing an oxynitride phosphor capable of exerting excellent internal quantum efficiency.SOLUTION: One aspect of the present disclosure provides the method of producing an oxynitride phosphor which is a method of producing an oxynitride phosphor containing a host crystal containing a nitrogen atom as a constituent element, and europium which forms solid solution in the host crystal including: a first step of heating a raw material mixture containing the host crystal and a europium compound to obtain a precursor; and a second step of heating the precursor at a temperature lower than that in the first step to obtain an oxynitride phosphor, in an inert gas atmosphere where the oxygen partial pressure is lower than 10-6 atm.SELECTED DRAWING: None 【課題】優れた内部量子効率を発揮し得る酸窒化物蛍光体の製造方法を提供すること【解決手段】本開示の一側面は、構成元素として窒素原子を含有する母体結晶と、上記母体結晶中に固溶されたユーロピウムとを含む酸窒化物蛍光体の製造方法であって、上記母体結晶及びユーロピウム化合物を含む原料混合物を加熱して前駆体を得る第一の工程と、酸素分圧が１０−６ａｔｍ未満である不活性ガス雰囲気下において、上記第一の工程よりも低い温度で上記前駆体を加熱して酸窒化物蛍光体を得る第二の工程と、を有する、酸窒化物蛍光体の製造方法を提供する。【選択図】なし