【摘要】 以SrCO3和Eu2O3为原料,采用高温固相反应法在空气气氛中合成了一种Eu和Sr的复合氧化物。利用XRD,TG/DTA和荧光光谱等测试手段对该种新物相的组成、结构和发光性质进行了研究。XRD结果显示,该物相的分子式组成为SrEu2O4,与BaEu2O4同构。荧光光谱表明,SrEu2O4存在一个双峰结构的Eu3+—O2-电荷迁移带,峰值分别位于257和280 nm;在紫外光激发下,SrEu2O4以5D0→7F2电偶极发射跃迁(618 nm)最强,发出强的红光。更多还原

【Abstract】 A new europium strontium oxide was synthesized by high-temperature solid state reaction of SrCO₃ with Eu₂O₃ in air.The new multiple oxide was characterized by use of XRD,TG/DTA and fluorescence spectra.The XRD results show that the molecular formula of the europium strontium oxide is SrEu₂O₄,whose structure is isostructural with that of BaEu₂O₄ reported earlier.The excitation spectrum of SrEu₂O₄ displays a broad double peaks band with one peak around 257 nm and the other（around） 280 nm.This broad band is attributed to the charge transfer transition of Eu³⁺—O^2- bonds.Excited with a radiation of 280 nm,SrEu₂O₄ emits strong red light which is assigned to the（）⁵D₀→（）⁷F₂ electric dipole transition of Eu³⁺.更多还原