COMPOUND BASED ON ZINC, GALLIUM AND OXYGEN, PREPARATION PROCESS AND UTILIZATION

摘要

The invention relates to a compound, more particularly a luminescent compound, based on zinc, gallium and oxygen, its preparation process and its utilization as luminophore. The compound is characterized in that it has a spinelle structure and in that it has an atomic ratio Ga/Zn of at least 2.5 and an X ray spectrum within which the position of the spectral lines on the 2 theta axis is situated between the line positions of the compositions Ga2O3 and ZnGa2O4. Said compound is obtained by preparing an homogeneous mixture at the atomic scale of the compounds of zinc, gallium and optionally the dopant; by proceeding to a first calcination with the air of the mixture and by carrying out a second calcination of the product obtained from the first calcination in a reducing atmosphere.