Synthesis of CaTiO3: Pr, Al phosphors by sol-gel method and their luminescence properties
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Red long afterglow CaTiO3: Pr, Al phosphors have been synthesized by sol-gel method using ethanol as solvent and citric acid as a chelating agent. TG-DTG curves and X-ray diffraction analysis indicate that crystalline calcium titanate has been synthesized at calcining temperature of 700 °C for 5 h. Photoluminescence and decay curves indicate that the luminescence properties of phosphors synthesized by sol-gel method are better than that prepared by solid-state reaction and the sample heated at 900 °C exhibits the optimal luminous property. Using ultrasonic dispersing technique improved the luminescence properties of phosphors.
KeywordsLuminescence Property Phosphor Powder Calcium Titanate Luminous Property Excitation Strength
The financial support from the Key Natural Science Fund of Science and Technology Department of Hubei Province under grant no. 2001ABA009 for this work is greatly appreciated.
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