Abstract
Ti-doped nano MgAl(2)O(4) for white emission was synthesized by combustion method. Extrinsic Schottky defects, Al vacancies and Ti(4+) dopant in Al sites, which are considered to be responsible for bluish-white emission, were observed by STEM on the surface of Ti-doped nano MgAl(2)O(4) powder. The stabilities of the Schottky defect associates, (Ti(Al)(·)-V(Al)''')'', were demonstrated by DFT calculation. The emission behavior was interpreted with these results.