【摘要】 采用微波等离子体法(MWPM)和高温固相法(HTSSM)合成长余辉发光材料SrAl2O4:Eu,Dy,重点比较了微波等离子体制备技术相对于传统工艺在主要参数条件上的差异及对产物形态、结构和性能的影响。X射线衍射分析表明在合适工艺条件下两者合成的产物均为单斜晶系的SrAl2O4,且前者的相组成纯度更高;粒度分析结果证明微波等离子体法合成粉体的粒度较小,且粒径分布更窄;荧光分光光度计测定两种样品的激发光谱和发射光谱,其位置和形状相差不大,峰值波长均分别位于375 nm和520 nm处,但微波等离子体法的谱强度更高。研究表明微波等离子体技术是一种高效、简便、易于重复和控制的高品质长余辉发光材料合成方法。更多还原

【Abstract】 SrAl₂O₄:Eu,Dy long persistence phosphors were synthesized by Microwave Plasma Method （MWPM） and High Temperature Solid State Method （HTSM）, aimed to reveal the availability of producing long persistence phosphors by Microwave Plasma Processing Technology. XRD analysis demonstrated that the structure of all products belongs to monoclinic system,but those prepared by MWPM have higher phase constitute purity. Grain size characterization also showed that the products synthesized by MWPM are in narrower size distribution and smaller mean dimension relatively. The emission and excitation spectra tested by spectrophotofluorometer illuminated that two kinds of luminescent powders have similar fluorescence properties except the MWPM synthesized with stronger luminescence and wider excited wavelength range. The research proved that MWPM is an efficient procedure for the production of long persistence phosphors of high quality.更多还原