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Preparation of Optical Storage Material CaS:Eu~(2+),Sm~(3+) by Hign-temprature Solid Method and Study of Properties

ZHANG Xiyan, JIANG Weiwei, LU Liping,MI Xiaoyun(College of Materials and Chemical Engineering,Changchun University of Science and Technology , Changchun 130022)  
The CaS:Eu 2+ ,Sm 3+ powders were prepared by h igh-temperature solid method in a reducing atmosphere. The influences on propert ies of samples from temperature and fired-time were studied. XRD analysis shows crystal structure of CaS has formed at 700℃. Spectrum analysis results show tha t the sample which was stimulated by 980nm laser after excitated by ultraviolet lamp emits red luminescence which peaking at 667nm .
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