Preparation and properties of luminous materials of CaSiO3 : Pb, Mn by sol-gel method

Abstract

The luminous materials of CaSiO₃ : Pb, Mn were synthesized by sol-gel method and ultrasound technology. The properties of the phosphors were characterized by luminescence spectrum, differential thermal analysis and thermal gravimetry analysis (DTA-TG), X-ray diffraction (XRD), Fourier transform infrared spectrometer (FT-IR) and transmission electron microscopy (TEM). The effects of factors such as the synthetic material compositions, ultrasound time and annealed temperature on phosphorescent brightness of sample were studied and the optimum synthetic conditions were determined. The results show that, compared with the sample made by the high temperature solid-state reaction, the luminescent intensity of the CaSiO₃ : Pb, Mn sample increased by about 200% and the mean diameter of particles of the sample decreased by about 300 nm.

Keywords

sol-gel method / ultrasound / luminescent mat erials / CaSiO₃ : Pb, Mn