Coprecipitation Synthesis of BaMgAl10O17:Eu2+ Phosphor

BaMgAl10O17:Eu2+ blue phosphor was prepared at 1200 degrees C by the coprecipitation one-step calcination process using the Ba(NO3)(2),Mg(NO3)(2)center dot 6H(2)O,A l(NO3)(3)center dot 9H(2)O, Eu2O3 and trace active surfactant as reactants and the NH4HCO3 as precipitating agent. It is found that the completely crystallized phosphors were obtained at 1200 degrees C, which is 400 degrees C lower than the temperature of solid-state method. The phosphor particles without agglomeration have regular shapes and uniform distribution, and their sizes are in the range of 190 nm-295 nm. The photoluminescence was investigated under UV region. The emission spectrum excited by 254 nm shows a characteristic wide band with the peak at about 450 nm. The optimum emission intensity is obtained at x = 0.14%.