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 SrAl2O11：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 synthesized sample is an orthorhombic system, Pnnm space group （a=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 SrAl2O11：Eu^2＋ exhibite broadband peaks, and the main emission peak is located at 462 nm, with the full width at half maximum （FWHM） of 64 nm. 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.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2008年第A01期81-84,共4页
Journal of The Chinese Ceramic Society
基金
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。
关键词
铝酸锶
微波合成
蓝色发光材料
strontium aluminate
blue luminescence material
microwave synthesize
