Small Eu2+ doped barium magnesium aluminate (BAM : Eu) phosphor particles with a narrow size distribution were prepared using a flux-assisted liquid phase precursor (LPP) method. XRD showed that the crystallinity of BAM particles increased significantly with an increase in the boric acid concentration, as a flux, and the firing temperature. According to FESEM, the phosphor particles produced without the flux and fired at 1450 oC had a rod type morphology, 60-100 nm in diameter and 500- 700 nm in length. The morphology of the phosphor particles transformed from a rod to a hexagonal type with a concomitant increase in the particle size (from ~1 to 2 μm) when 1, 2 and 5 wt% of boric acid was added. The photoluminescence intensity of phosphor particles was also influenced by the addition of the flux due to the enhanced particle size, crystallinity and activator ion distribution.

Keywords: Liquid phase precursor method, boric acid, phosphor, rod shaped morphology.