Investigation of Phase and Luminescence Properties of SrMgAl2SiO7:Eu2+ Nanocrystalline Pigment and Colorimetry of Final Phosphors

This paper reports the luminescence properties and colorimetry of Eu2+ activated SrMgAl2SiO7 pigments prepared via a solgel method. Effect of calcination time on pigment properties has been characterized by X-ray diffraction (XRD) and spectrophotometer. Furthermore, microstructure has been studied by Scanning Electron Microscope (SEM). By using scherrer equation, it was realized that the crystallite size of the synthesized powder increases as time of calcination increases and crystallite size of final product was estimated 30-40 nm. Investigation of luminescence properties, illustrated that Eudopednanocrystals when exposed to 260 nm UV light, showed a uniform and relatively pure blue color that is related to the 4f 7  4f 65d 1 transition of Eu2+ in the phosphor lattice with color coordination (x = 0.187, y = 0.077). Furthermore, it was found that the color purity of the pigment increases as calcinations time increases. J. Color Sci. Tech. 3(2010), 251-256 © Institute for Color Science and Technology.