中文摘要：

采用高温固相法制备了CaAl2O4∶Eu2＋,Gd3＋长余辉发光材料。利用X射线衍射（XRD）和荧光光谱测试等手段对所制备的样品进行结构表征和发光性能的分析,探究Eu2＋摩尔分数为3.5%,硼酸质量分数为0.5%,Gd3＋摩尔分数分别为2%,3%,4%,5%时样品的发光性能。研究结果表明：实验成功地合成了CaAl2O4∶Eu2＋,Gd3＋粉晶,并且Eu2＋和Gd3＋的引入并未引起CaAl2O4晶体结构的改变。样品的激发光谱和发射光谱均为宽带谱,且发射光谱的最大峰值位于444 nm左右,属于Eu2＋的4f65d→4f7跃迁,所发光为蓝光。蓝色荧光粉CaAl2O4∶3.5%Eu2＋,3%Gd3＋的发光强度最好。

英文摘要：

The afterglow materials CaAl2O4∶Eu2＋,Gd3＋ were synthesized by high-temperature solid-phase method.The structure and luminescent properties of the samples were characterized by X-ray diffraction（XRD） and fluorescence spectra at room temperature.The effects of luminescent properties for 3.5% Eu2＋（mole fraction） and 0.5% boric acid（mass fraction） doped CaAl2O4∶Eu2＋,Gd3＋ with different mole fraction of Gd3＋（2%,3%,4%,5%） were investigated in detail.The results showed that CaAl2O4∶Eu2＋,Gd3＋ were successfully synthesized and the structure was not changed even introducing Eu2＋ and Gd3＋ into the samples.The photoluminescence excitation and emission spectra were both broad bands.The dominanted emission band centre located at about 444 nm which was the blue emission of the transition of 4f65d→4f7.The luminescence intensity of blue phosphors CaAl2O4∶3.5%Eu2＋,3%Gd3＋ is the best among all samples.