SYNTHESIS AND CHARACTERIZATION OF SrAl 2 O 4 : Sm PHOSPHOR BY LOW TEMPERATURE SYNTHESIS

The alkaline earth aluminate phosphor SrAl2O4: Sm synthesized by solution combustion method at low temperature (550 ̊C) using metal nitrates with oxalyne dihydrazine as fuel. This process results in large production of phosphor with low density, can be achieved within 5 minutes when compared to other conventional methods. The synthesized product was characterized by X-Ray Diffraction studies, Scanning Electron Microscope, Thermal studies, FTIR, Atomic Force Microscopy and UV-VISIBLE. XRD confirms monoclinic phase, Scanning Eectron Microscope prove that the nano phosphor is highly voluminous and porus. Thermal behaviour shows that loss of weight is less when compared to other methods. Atomic force microscopy shows that the particle size varies with calcination temperature. The average particle size without calcination is found to be 50 to 100nm. The band gap of nano phosphor found to be 5.18ev.