摘要
采用乙醇溶液中溶解脂肪酸和超声波分散的方法研究微米级CaS∶Eu荧光粉颗粒表面均匀包覆硬脂酸(SA).用IR与XRD表征了包覆物(硬脂酸)与CaS∶Eu颗粒表面的结合情况.采用荧光光谱测试了荧光粉包覆前后的荧光性质和耐候性.用粒度分布表征了荧光粉的粒径变化情况,通过平均粒径推算出最佳包覆厚度是1.67μm.研究表明包覆后的荧光粉的耐候性能明显增强.
CaS ： Eu phosphor surface were coated by method of solution stearic acid and ultrasonic dispersed in ethanol solvent. Chemical bond between stearic acid and CaS： Eu particle surface were characterized using IR and powder X-ray diffraction （XRD）. Water and weather resistance properties of the particles were analysized by photolumi spectra and intensity. The results of particle size distribution indicate that a layer of much smaller stearic acid （about 1. 67 μm） coating particles indeed covered on the surface of phosphor, and the effects against moist air of coated CaS ： Eu particles was enhanced remarkably.
出处
《湖南师范大学自然科学学报》
CAS
北大核心
2007年第1期64-67,共4页
Journal of Natural Science of Hunan Normal University
基金
国家自然科学基金资助项目(20371017)
