中文摘要：

利用高温固相法在H2和N2还原气氛中制备了Ce^3＋掺杂的Sr2Al2SiO7蓝色荧光粉。通过X射线衍射和扫描电子显微镜研究了荧光粉的组成和表面形貌。探讨了Ce^3＋含量,锻烧温度等对合成样品发光性能的影响。结果表明：所制得的样品为Sr2Al2SiO7晶粒;样品晶粒均匀,粒径为2.0μm左右。掺0.03（摩尔分数）Ce^3＋的样品,在1400℃锻烧10h样品的发光强度最高。Sr2Al2SiO7：Ce^3＋的激发光谱和发射光谱在350～420nm和450～650nm范围内分别呈现1个宽峰;激发峰值位于362nm处,发射峰值位于478nm处。Sr2Al2SiO7：Ce^3＋可被紫外光有效激发,并且发出很强的蓝光,是一种很好的用于紫外光芯片基的白光发光二极管的荧光粉。

英文摘要：

A trivalent ion of cerium（Ce^3＋） doped Sr2Al2SiO7 blue phosphor powder was prepared by high temperature solid state method under H2 and N2 reducing atmosphere.The crystal structure and particle morphology of the phosphor powder were investigated by the X-ray diffraction and scanning electron microscopy,respectively.The effects of mole content of Ce^3＋ and calcining temperature on the luminescence properties of the Sr2Al2SiO7：Ce^3＋ sample were discussed.The results indicate that the sample prepared at 1 400 ℃ has a single Sr2Al2SiO7 phase and good crystalline state,and its crystalline grain size is about 2.0 μm.The luminous intensity of Sr2Al2SiO7：0.03Ce^3＋ calcined at 1 400 ℃ for 10 h reaches the maximum value.The excitation and emission spectra have broad band peaks of 350-420 nm and 450-650 nm,respectively,and the emission and excitation peaks are located at 478 nm by ultraviolet（UV） light exciting and at 362 nm.It indicates that this phosphor is a good candidate for UV chip based white light-emitting diodes.