硅酸盐学报

蓝色发光材料Sr_2Al_6O_(11)：Eu~(2+)的微波合成及性能

作者：刘文芳宋会花

单位：河北师范大学化学与材料科学学院河北师范大学化学与材料科学学院石家庄050016 石家庄050016

关键词：铝酸锶微波合成蓝色发光材料

分类号：O611.3

出版年,卷(期):页码：2008,36(S1):81-84

DOI：

摘要：

在微波场作用下快速合成了蓝色发光材料Sr_2Al_6O_(11):Eu~(2+)。由X射线衍射分析样品的晶相,扫描电镜观测晶体形貌。结果表明:产品为正交晶系,Pnnm空间群,a=2.191 827nm,b=0.840 857nm,c=0.488 175nm。产物主要为直径为200nm左右,长度约在1～2mm的棒状晶体,其间混有少量球状晶体。激发和发射谱均为宽带谱,主发射峰位于462nm处附近,半高宽为64nm,Eu~(2+)在Sr_2Al_6O_(11)基质中存在2个发光中心,经Gaussian曲线拟合,其2个分量分别位于456.7nm和483.4 nm处,与高温固相反应法合成的样品相比,这两个峰发生蓝移。随Eu~(2+)掺量的增大,2个发光中心的发光强度同时先增强后减弱,Eu~(2+)的掺量为0.1 mol时发光最强。

Blue luminescent material of SrAl_2O_(11):Eu~(2+) was synthesized by the microwave radiation method.The crystal composition and crystal shape of the samples were characterized by X-ray diffraction and scanning electron microscopy.The results show that the synthe- sized sample is an orthorhombic system,Pnnm space group (α=2.191 827 nm,b=0.840 857 nm and c=0.488 175 nm).Most of the samples are stick-shaped crystals 200 nm in diameter and 1-2 mm in length;furthermore,a few ball-shaped crystals were mixed in with them.The excitation and emission spectra of the SrAl_2O_(11):Eu~(2+) exhibite broadband peaks,and the main emission peak is located at 462 nm,with the full width at half maximum (FWHM) of 64nm.Eu~(2+) has two luminescence centers,and the peaks of Eu~(2+) are located at 456.7 nm and 483.4 nm with the Gaussian curve fit method.The positions of the two peaks are blue-shifted by contrast with the high-temperature solid reaction method.With the increase of the doping concentration of Eu~(2+),the strength of the emission peaks of the two centers increased first and decreased later.When the doping amount of Eu~(2+) was 0.1 (in mole) the luminescent strength is the greatest.

基金项目：

河北师范大学博士基金(103261);; 国家自然科学基金(20601007);; 河北省教育厅基金(ZH2006002)资助项目。

作者简介：

参考文献：

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