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Properties and Luminescent Mechanism of SrAl2O4Eu,Dy,a Long-Lasting Phosphorescent Ceramics

ZHANG Zhongtai,ZHANG Feng,TANG Zilong,SUN Hongfei Department of Materials Science and Engineering,Tsinghua University,Beijing,100084,China  
SrAl2O4Eu,Dy materials was prepared.The fluorescence spectra,the excitation spectra and the decay curves were measured.The relations between the content of Dy,the light intensity and light-lasting time were first reported in this paper.The explanation of the luminescent mechanism of SrAl2O4Eu,Dy materials was presented.
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