摘要
以NaCl和KCl为熔盐,采用熔盐法合成了(La,Ce,Tb)PO4绿色荧光粉.利用XRD、SEM、激光粒度仪、光谱分析仪等测试和分析荧光粉物相、粒径、形貌及发光性能,主要考察了复合熔盐用量、合成时间及合成温度对荧光粉性能的影响,并对反应机理进行探讨.结果表明,复合熔盐与前驱体的摩尔比为2.5～3.5,在900℃保温3 h,可以得到性能良好的(La,Ce,Tb)PO4绿色荧光粉,其发光亮度优于高温固相法.
Using sodium chloride and potassium chloride as molten salts,（La,Ce,Tb） PO 4 was prepared through molten salt method in this paper.Morphology,phase,particle size and luminescent properties were measured and analyzed by SEM,XRD,laser particle size and luminescence spectrum.The effects of amount of compound molten salt,sintering temperature and time on properties of the phosphor were studied.Then the reaction mechanism was discussed.The results indicate that high performance（La,Ce,Tb） PO4 green emitting phosphor whose peak intensity is higher than that of the phosphor prepared by high temperature solid state reaction can be obtained when the optimal ratio of the compound molten salt to precursor is 2.5 ～3.5,and the best condition for roasting is 900 ℃ holding for 3h.
出处
《有色金属科学与工程》
CAS
2013年第4期111-116,共6页
Nonferrous Metals Science and Engineering
关键词
磷酸镧铈铽
熔盐法
发光亮度
粉体粒径
（La
Ce
Tb） PO 4
molten salt method
luminescent intensity
particle size
