The Rare Earth Praseodymium-doped Catio <sub> 3 </ Sub> Luminescent Materials And Characterization,

In this paper,adopted CaTiO₃ as the host,a kind of pr³⁺-doped phosphors was prepared used different starting materials and by different methods,and characterized by PL spectrum,XRD,SEM,DSC-Tg.The PL property and mechanism of pr³⁺-doped in the host were discussed.The influence to the PL intensity and morphology of experimental conditions and synthetic methods were also studied.Using CaCO₃ and Pr(NO₃)₃ as raw materials,CaTiO₃:Pr³⁺ have been synthesized via a solid-state reaction.Photoluminescence and decay curves show that the sample obtained at the sintering temperature of 1200℃exhibited the optimal luminous property.Phosphors CaTiO₃:Pr³⁺ have been synthesized by sol-gel method using ethanol as solvent.CaTiO₃:Pr³⁺ synthesized at the sintering temperature of 900℃exhibits the optimal luminous property.DSC-TG curves and X-ray diffraction analysis indicate that CaTiO₃:pr³⁺ has been synthesized at the sintering temperature of 900℃exhibited the optimal luminous property.Using urea as fuel and boric acid as flux material,red persistent phosphors CaTiO₃:Pr³⁺ have been successfully synthesized by combustion method.The photoluminescence,crystal and particle morphology of persistent phosphors were investigated.Using oxalate and ammonia as raw materials,CaTiO₃:Pr³⁺ have been synthesized via a co-precipitated reaction.Photoluminescence and decay curves show that the sample obtained at the sintering temperature of 900℃and at PH of 9 exhibited the optimal luminous property.At last,four methods are compared comprehensively.To optimize organization the four methods,CaTiO₃:Pr³⁺ could have stronger optimal luminous property.