Rapid Combustion Synthesis of Light-Storing-Emitting Material SrAl2O4 : Eu2 + , Dy3 + and Its Spectral Characteristics

摘要: Light-storing-emitting materials composed of SrAl 2 O 4 :Eu 2+ ,Dy 3+ are synthesized via the wet combustion method, and fluffy resultants obtained easily pulverized into powder samples. The fluorescent spectra sample show same characteristics as those samples fabricated by dry method. But phosphorescent spectrum shows uniquely two peaks at 506 535 nm, with intensity nm stronger than that which is presumably ascribed to splitting 5d orbitals Eu groups, eg t 2g . lower-energy level has equal d z2 x2-y2 , while higher-energy three xy xz yz More photons stored released from higher orbitals, resulting in a peak spectrum.