Process for the preparation of phosphor.

摘要

A process for the preparation of a divalent europium activated alkaline earth metal fluorohalide phosphor containing a metal oxide, which comprises firing a mixture of starting materials comprising an alkaline earth metal halide, a trivalent europium compound and a metal oxide source, charcterized in that said firing is carried out in at least two stages, and at least a portion of said metal oxide source is added to the fired product obtained after the first firing stage.