Aluminate fluorescent material, light emitting device using the same, and method of producing aluminate fluorescent material

摘要

Provided is an aluminate fluorescent material having a high emission intensity and having a composition containing a first element that contains one or more of Ba and Sr, and a second element that contains Mg and Mn. In the composition, when a molar ratio of Al is 10, a total molar ratio of the first element is a parameter a, a total molar ratio of the second element is a parameter b, a molar ratio of Sr is a product of a parameter m and the parameter a, a molar ratio of Mn is a product of a parameter n and the parameter b. The parameters a and b satisfy 0.5ba≤0.5b+0.51.0, the parameter m satisfies 0≤m≤1.0, and the parameter n satisfies 0.4≤n≤0.7.