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《Journal of Hebei University(Natural Science Edition)》 2008-05
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Study on the Luminescent Properties of (Ca_(1-x)Sr_x)S:Eu~(2+) Phosphor Formed by Combustion

LIU Chong1,2,YANG Zhi-ping1,LI Xu1,GUAN Li1,WANG Ying1,GUO Qing-lin1(1.College of Physics Science and Technology,Hebei University,Baoding 071002, China; 2.College of Graduate,Hebei University,Baoding 071002,China)  
A red phosphor(Ca1-xSrx)S: Eu2+ was synthesized by combustion method with ignition temperature of 500~550 ℃ using oxidation-reduction reaction of the mixed metal nitrate.The effect of experimental conditions on its luminescent properties was studied.XRD patterns of samples synthesized with different ration of Sr and Ca show that all of them belong to cubic phase.SEM image indicates that the uniform crystal grain of the(Ca1-xSrx)S: Eu2+ prepared by combustion is in micro level.The excitation spectrum is composed of two broad band covered 300~500 nm and emission spectrum makes up of only one broad band that the peak locate at 624 nm when n(Sr)∶n(Ca)=1.The luminescent intensity will reach the maximum when the mole fraction of Eu2+ is 0.008.The luminescent intensity and the crystallinity will enhance if the precursor is sintered at 1 100 ℃ for 5 h in a muffle furnace.Comparing with the solid-state method,the combustion method uses less time;Lower temperature and the emission spectrum has little change.Sulfourea used in the experiment is an applied reducer for its lower price and fast reactionary speed.
【Fund】: 国家自然科学基金资助项目(50472037)
【CateGory Index】: O482.31
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