目的 制备出一种余辉亮度高、余辉时间长的荧光复合涂层。方法 涂层的主要发光材料为SrAl2O4:Eu²⁺,Dy³⁺，以溶胶凝胶法在其表面包覆SiO2。主要的成膜物质是工业级水基硅丙乳液。通过适量添加玻璃鳞片，在对涂层余辉效果影响较小的情况下，大幅增加涂层的机械性能，来提高涂层的应用性能，通过铝粉底涂层增加荧光涂层的余辉亮度和余辉时间。通过测定余辉亮度、余辉时间、反射率和拉拔附着力等相关性能，实验优化荧光涂料成分配比。结果 在荧光涂层厚度为550 μm时，余辉亮度为4.227 cd/m²，余辉时间为1471.6 min(24.5 h)。选择合适的片状铝粉粒径所制备的铝粉涂层的反射率可达64%以上，在增加反光层之后，余辉亮度增加到5.998 cd/m²，较单一荧光涂层增加约40%，余辉时间增加到1855 min(30.9 h)，较单一荧光涂层增加约26%。结论 在一定范围内，荧光复合涂层的余辉亮度和余辉时间受荧光粉的添加量和涂层厚度的影响较大，但达到一定含量后，余辉亮度增加趋于平缓。增加配套的铝粉底涂层进一步增加了余辉亮度和余辉时间，是提高荧光涂层余辉亮度和余辉时间的有效技术途径。

This paper aims to prepare a fluorescent composite coating with high afterglow brightness and long afterglow time. The main luminescent material of the coating is SrAl2O4:Eu2+,Dy3+, and SiO2 is coated on its surface by sol-gel method. The main film-forming material is industrial grade water-based silicone acrylic emulsion. By adding appropriate amount of glass flakes, the mechanical properties of the coating could be greatly increased to improve the application performance of the coating without much influence on the afterglow effect of the coating. The afterglow brightness and time of the fluorescent coating were increased by the aluminum power bottom coating. By measuring the afterglow brightness, after glow time, reflectivity and drawing adhesion and other related properties, the experimental optimization of fluorescent coating composition ratio, the afterglow brightness is 4.227 cd/m2 and the afterglow time is 1471.6 min (24.5 h) at the fluorescent coating thickness of 550 μm. The reflectivity of the aluminum powder coating prepared by choosing the appropriate particle size of the flake aluminum powder can reach more than 64%, and the afterglow brightness increases to 5.998 cd/m2 after adding the reflective layer, which is about 40% more than that of the single fluorescent coating; the afterglow time increases to 1855 min (30.9 h), which is about 26% more than that of the single fluorescent coating. In a certain range, the afterglow brightness and afterglow time of the fluorescent composite coating are greatly affected by the amount of phosphor added and the thickness of the coating, but the increase of afterglow brightness tends to be gentle after reaching a certain content. It is an effective technical way to improve the luminance and duration of fluorescent coating by adding matching aluminum powder coating.