中文摘要：

为了探索Eu^3＋在晶格位置中占据不同对称中心时的发光性质,采用高温固相法制备了BaM2ZnO5∶Eu^3＋（M=La,Gd）系列红色荧光粉,分别用X射线衍射（XRD）、扫描电镜（SEM）、荧光光谱（PL）对其晶体结构、形貌和发光性质进行了表征。结果表明,经1000℃烧结后可得到BaM2ZnO5（M=La,Gd）纯相,荧光粉的颗粒大小分布较均匀,粒径大约为3μm-5μm;BaM2ZnO5∶Eu^3＋（M=La,Gd）荧光粉可以被395 nm的近紫外光有效激发,BaLa2ZnO5∶Eu^3＋在595 nm处的发射峰为最强峰,对应于Eu^3＋的^5D0→^7F1（595 nm）磁偶极跃迁。BaGd2ZnO5∶Eu^3＋在627 nm处的发射峰为最强峰,对应于Eu^3＋的^5D0→^7F2（615 nm,627 nm）电偶极跃迁。

英文摘要：

In order to study the luminescent properties of Eu^3＋ which occupied the different center of inversion in lattice,red phosphors of Eu^3＋ -dopped BaM2 ZnO5（M = La,Gd） were prepared by solid-state reaction. Structure and photoluminescence properties of the phosphors were characterized by X-ray diffraction（XRD）,scan electron microscopy（SEM）,photoluminescence spectrophotometer（PL）. XRD results showed that the pure phase of BaM2 ZnO5（M = La,Gd） could be obtained available after being fired at 1000 ℃. The particles have a slight agglomerate phenomenon with the diameter of about 3 - 5 μm.Ba La2 ZnO5Eu^3＋ phosphors could be effectively excited by the near UV irridiation（395 nm） and emit orange light at 595 nm due to the magnetic dipole^5D0→^7F1transitions on Eu^3＋ ,which indicated that Eu^3＋ occupied the symmetry sites in the BaLa2 ZnO5host lattice. Ba Gd2 ZnO5Eu^3＋ phosphors could be effectively excited by the near UV irridiation（395 nm） and emit orange light at 627 nm due to the forced electric dipole^5D0→^7F2transitions on Eu^3＋ ,which indicated that Eu^3＋ occupied the site without center of symmetry in the Ba Gd2 ZnO5host lattice.