中文摘要：

采用传统的高温固相合成技术制备出一系列组成为MSrAl3O7：Eu^2＋（M—Y，La，Gd）的新型绿色发射荧光体。通过X射线衍射（XRD）研究其晶体结构发现：MSrAl3O7：Eu^2＋系列荧光体属于M2O3-SrO-Al2O3赝三元体系的稳定结晶相。荧光光谱测试表明：MSrAl3O7：Eu^2＋（M=Y、La、Gd）材料均是优良的白光LED用绿色荧光体，可被近紫外（300～450nm）有效激发，产生较强的绿色发射光，发射主峰位于517nm左右，样品的紫外-可见（UV-vis）光谱进一步证实了其有效吸收近紫外光的特征。研究还发现，在MSrAl3O7：Eu^2＋（M—Y、La、Gd）系列荧光体中，LaSrAl3O7：Eu^2＋具有最强的绿色发射光，进一步地比较不同温度下LaSrAl2O7：Eu^2＋材料的结构与光谱特性表明，1400℃合成的样品具有稳定的结构和最佳的发光性能。

英文摘要：

A series of green-emitting phosphors with compositions of MSrAl3O7 ： Eu^2＋ （M=Y, La,Gd） were prepared by the traditional solid-state method. Their structural phases were investigated using X-ray diffraction （XRD） technique,and it was found that these phosphors belonged to some stable crystal phase in M2O3-SrO- Al2O3 pseudo-ternary system room-temperature optical properties for MSrAl3 O7 ： Eu^2＋ （M = Y, La, Gd） phosphors were analyzed by the UV-vis diffuse reflectance spectroscopy, excitation and emission spectroscopy. It was found that,MSrAl3O7 ： Eu^2＋ （M= Y, La, Gd） phosphors showed broad excitation in the near ultraviolet region （300-450 nm）,and they all exhibited green light with peak wavelength at 517nm,which indicated that they were promising as the green component of light-conversion phosphors for white LEDs. Further investigations for MSrAl3O7 ： Eu^2＋ （M= Y, La,Gd） phosphors indicated that MSrAl3O7 ： Eu^2＋ showed the strongest green emission,and the optimum reaction temperture was 1400℃ ,at which stable crystal structure and excellent optical properties could be obtained.