摘要
以硝酸铕、硝酸钐、氯化铝、氧化镧、氧化钇、磷酸三铵为原料,经高温固相反应合成得到了Al,Sm,Eu掺杂磷酸镧钇荧光粉。用XRD,SEM,荧光光谱及TG/DTG对产物进行了表征。采用非等温法研究前驱体的热分解过程。结果表明,Al3+的最佳掺杂浓度为x=0.07,所得产物为以磁偶极(5D0→7F1)跃迁为主导发射的红色荧光粉。最佳样品与未掺杂样品相比,前者的荧光强度是后者的1.64倍。最佳样品前驱体的热分解过程只有一步失重,经计算获得了该过程所对应的活化能、机理函数及频率因子。
AI, Sm, Eu codoped with lanthanum yttrium phosphate phosphors were obtained via solid state reaction at a high temperature using samarium nitrate, aluminum chloride, lanthanum oxide, yttrium oxide, triammonium phosphate as raw materials. The products were characterized with XRD, SEM, PLE ＆ PL and TG/DTG. The thermal decomposition kinetics of the precursor was studied by non-isothermal method. The results showed that the optimal doping concentration of Al3＋ was x = 0. 07, which led to forming phosphor with magnetic dipole （5 D0--7 Fl ） transition as dominant emission. When the optimal sample was compared with non-doped sample, the fluorescence intensity of the former was 1.64 times higher than that of the latter. The thermal decomposition of the precursor for the optimal sample was carried out in one weight loss process. Activation energy, mechanish function and frequency factor were got via calculation.
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2017年第5期1899-1906,共8页
Journal of Guangxi University（Natural Science Edition）
基金
国家自然科学基金资助项目(21661006)
南宁市科学研究与技术开发计划项目(20151279)
南宁市科学研究与技术开发计划项目(20161284)
关键词
发光材料
磷酸盐
荧光粉
热分解动力学
luminescent materials
multiple doping
phosphate
phosphor
thermal decomposition kinetics
