燃烧法合成SrAl_2O_4:Eu~(2+),Dy~(3+)铝酸盐长余辉发光材料的工艺优化研究

采用燃烧法合成SrAl2O4:Eu2+,Dy3+稀土长余辉发光材料,利用正交设计实验进行了工艺优化,研究各工艺因素对产物发光性能的影响规律。结果表明,影响材料发光性能最主要的工艺因素是尿素的添加比例,其次是点火温度和还原方式。材料的发光性能随尿素的添加比例的增加表现出先增强后减弱的变化趋势,而随点火温度的提高而有所增强。光谱分析显示,燃烧法所合成材料的激发光谱和发射光谱都为宽带谱,主峰分别位于368 nm和514 nm处。XRD及SEM分析表明,在最优化的工艺条件下制备的产物为纯相的单斜晶系的SrAl2O4,粒径尺寸控制在0.3～1μm之间,结晶干净完整,保证了材料发光性能优良。

Processing optimization of SrAl2O4:Eu2+,Dy3+ aluminate long persistence phosphors synthesized by combustion synthesis method

SrAl2O4:Eu2+,Dy3+long persistence phosphors were synthesized by combustion synthesis.The synthesizing technology was optimized by means of orthogonal experiment design method.The effect of technological parameters on product′s luminescence performance was studied.The results show that the most important factor impacting on the materials luminescence property is the content of carbamide,then the temperature and the reduction method.The performance enhances at beginning as the content of carbamide increasing,but descends later,and can be improved by increasing the temperature.Spectral analysis reveals that the target material exhibits broadband peaks in both excitation and emission spectra in which the main excitation peak locates at around 368 nm,and the main emission peak around 514 nm.XRD analysis demonstrates that the structure of obtained SrAl2O4 belongs to monoclinic system.SEM characterization shows that the grain has size between 0.3～1 μm along with fine crystal integrity,so that it has excellent luminescence performance.