BaMgAl10O17 : Mn Phosphor Preparation by Self-Propagating High-Temperature Synthesis

Self-propagating high-temperature synthesis of BaMgAl10O17 : Mn phosphor samples has been performed using the thermal effects of aluminum reactions with sodium perchlorate and barium peroxide. Energy-dispersive X-ray diffraction analysis has been used to determine the qualitative and quantitative composition of the phosphor. Phase composition of the synthesis products has been determined by X-ray powder diffraction analysis, and their luminescent properties have been characterized by excitation and emission spectra. Effect of barium source (barium peroxide and barium nitrate), the Al/Al2O3 ratio in the batch, and the manganese content in the phosphor on the luminescence characteristics of the synthesized product has been studied. When barium is introduced into the batch as peroxide, manganese is incorporated into the phosphor matrix as Mn2+ and Mn4+ ions, and emission is observed at 512 and 665 nm. When barium is introduced as nitrate, only Mn2+ ion emission is observed at 512 nm. It has been shown that the maximum luminescence intensity at 512 nm is achieved for a phosphor sample obtained using barium peroxide with stoichiometric Al/Al2O3 ratio in the batch of 3 : 3.5, and a manganese content in the phosphor of 0.25 mol.