Abstract
Oxides such as BaAl12O19 and BaAl2O4 in the BaO–Al2O3 system demonstrate potential for optical applications due to the abundant tetrahedral and octahedral sites in their structures, as well as their high thermal stability, good chemical stability, high surface area and strong light absorption capacity. Rare earth element doping or transition metal ion doping in oxides in the BaO–Al2O3 system contributes to promising photoluminescent, visible color and catalytic properties. In this review, the structures of BaAl12O19, BaAl2O4, Ba3Al2O6, Ba4Al2O7, and Ba7Al2O10 in the BaO–Al2O3 system are introduced. Their applications in phosphors, pigments and catalysts are also summarized herein.
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