Ca8M（SiO4）4Cl2（M=Mg,Zn）中Ce^3＋的发光性质

报道了氯硅酸镁钙Ｃａ８Ｍｇ（ＳｉＯ４）４Ｃｌ２及氯硅酸锌钙Ｃａ８Ｚｎ（ＳｉＯ４）４Ｃｌ２中Ｃｅ＾３＋的发光特性，研究并分析了Ｃｅ＾３＋在这两种材料中的激发光谱，发射光谱及荧光衰减特性，在ＵＶ辐射激发下，Ｃｅ＾３＋发射出强的蓝紫光。室温下Ｃｅ＾３＋在两种材料中的荧光寿命分别为６１ｎｓ和４４ｎｓ。     

Emission Spectra and Crystallographic Sites of Eu~(2+) in Ca_8Zn(SiO_4)_4Cl_2

The fluorescent characteristic and emission spectra of Eu~(2+) in the cubic structureCa_8Zn(SiO_4)_4Cl_2 with three kinds of cation sites is reported.The influence of temperature,Eu~(2+) concentra-tion and excitation conditions on fluorescent properties of Eu~(2+) are studied at 77 and 298 K.Thecoordination number of Eu~(2+) at different sites is obtained.The green and red emission bands arise fromEu_(2+) ions locating on eight- and six- coordinated inequivalent sites respectively.