Process for producing aluminate-based phosphor

A method for producing an aluminate-based phosphor comprising the steps of;

• mixing an aluminum compound with an organic acid using an organic solvent to obtain a slurry,
• mixing the slurry with an aqueous solution of at least one cation selected from the group consisting of Ba, Mg, Eu, Mn, Sr, Ca, Tb, Ce and Zn to obtain a slurry of the mixture,
• precipitating the cation in the form of an organic acid salt around the aluminum compound to obtain a precursor,
• separating and drying the precursor, and
• calcining the precursor at a temperature of from 1000° C. or more to 1700° C. or less, to produce an aluminate-based phosphor.

A method for producing a luminescent aluminate-based phosphor comprising the steps of;

• mixing an aluminum compound with an organic acid using an organic solvent to obtain a slurry,
• mixing the slurry with an aqueous solution of at least one cation selected from the group consisting of Eu, Dy, Nd, Sr, Ca, Pb, Zn and Bi to obtain a slurry of the mixture,
• precipitating the cation in the form of an organic acid salt around the aluminum compound to obtain a precursor,
• separating and drying the precursor, and
• calcining the precursor at a temperature of from 1000° C. or more to 1700° C. or less, to produce an aluminate-based phosphor.