Synthesis and luminescence properties of CaTiO3:Pr3+ phosphor from oxalate precursor

CaTiO3:Pr3+ was synthesized from oxalate precursor [CaTiO(C2O4)(2)center dot 4H(2)O] (CTO) at 900 degrees C, in which Pr3+ ions were dispersed by room temperature grinding. The decomposition process of the oxalate precursor was analyzed by the thermogravimetry and differential thermogravimetry curve (TG-DTG). The crystallization and luminescence properties of CaTiO3:Pr3+ were tested by means of X-ray diffraction (XRD), luminescence spectrometer and brightness meter. The oxalate precursor has a characteristic of weak red afterglow after being excited by ultraviolet (UV) light at room temperature for 15 min. The result suggested that phosphor is typically synthesized for a doping level of 0.1 wt% at 900 degrees C for 6 h, which were regarded as the optimal synthesis conditions. (C) 2013 Elsevier B.V. All rights reserved.