Sintering and Phosphorescent Properties of Strontium Aluminate (SrAl2O4) Phosphors by Spark Plasma Sintering

Eu2+ and Dy3+ co-doped strontium aluminate (SrAl2O4) phosphors have been considered as strong and lasting phosphorescent eco-materials for chemically stable, safe making and long lasting phosphorescence process without radiation, compared with sulfide phosphors. In this study, Eu2+ and Dy3+ co-doped strontium aluminate (SrAl2O4) phosphors were prepared by spark-plasma sintering (SPS) at 873 K, 1273 K and 1623 K. The structures of Eu2+ and Dy3+ co-doped SrAl2O4 were investigated by X-ray diffraction (XRD), differential thermal analysis-thermo gravimetric analysis (DTA-TG), and shrinkage during the sintering process. It was found that synthesis of SrAl2O4 over 1273 K, two stage shrinkage temperature zone blow 1073 K and over 1573 K. Phosphorescences of Eu2+ and Dy3+ co-doped SrAl2O4 were observed at 450- 650 nm.