Fine-sized BaMgAl10O17:Eu2+ phosphor powders with plate-like morphology prepared by AIF3 flux-assisted spray pyrolysis

Fine-sized BaMgAl10O17:Eu2+ (BAM:Eu) phosphor powders with regular morphology were prepared by flux-assisted spray pyrolysis. The precursor powders with hollow structure and large size obtained by spray pyrolysis were mixed with aluminum fluoride flux. The post-treated BAM:Eu phosphor powders had fine sizes, narrow size distributions, and plate-like morphologies without milling process. The mean size of the BAM:Eu phosphor powders obtained from the optimum amount of aluminum fluoride flux was 1.1 mu m. The photoluminescence intensity of the phosphor powders obtained from the precursor powders without flux was 84% of that of the commercial phosphor powders. On the other hand, the photoluminescence intensities of the phosphor powders obtained from the precursor powders with 3 and 5 mass% aluminum fluoride flux were each 90% and 93% of that of the commercial phosphor powders. (c) 2008 The Ceramic Society of Japan. All rights reserved.