| abstract |
【Task】 Provided is a fine phosphor having a uniform particle size and high emission intensity. [Solution] General formula, R 1 O (CH 2 CH 2 O) n R 2 (wherein n is an integer of 1 to 10 and R 1 and R 2 are a hydrogen group, an alkyl group, an alkyl ether group, an aliphatic group. (It is a group selected from the group consisting of an ester group, a phenyl group and a halogen group.) The alkaline earth metal compound or aluminum compound is invisible under visible light under atmospheric pressure, and the alkaline earth metal compound and / or aluminum metal compound is invisible under visible light. Heat until changed to fine phosphor. [Selection figure] None |