复合熔盐法合成Y_2O_3:Eu^(3+)红色荧光粉

Synthesis of Y_2O_3:Eu^(3+) red phosphor by compound molten salt method

以草酸钇铕(Y2(C2O4)3:Eu3+)为前驱体,采用复合熔盐(NaCl+S+Na2CO3)协助焙烧法合成Y2O3:Eu3+红色荧光粉。利用XRD、SEM、光谱分析等测试和分析荧光粉粒径、颗粒形貌以及发光性能。主要考察复合熔盐配比、用量以及焙烧温度和时间对Y2O3:Eu3+荧光粉发光性能的影响。结果表明,NaCl在熔盐中摩尔分数宜控制在40%~45%,复合熔盐用量以与前驱体摩尔比为2~2.5最佳;焙烧条件以1 300℃保温2 h较适宜;所得Y2O3:Eu3+产品发射光谱主峰强度高出商业红粉11%,颗粒分散性好、形貌为近球形且表面无缺陷,颗粒的平均粒径为1~3μm,小于商业红粉。

Y2O3：Eu3＋ red phosphor was synthesized by roasting assisted with（NaCl＋S＋Na2CO3） compound molten salt using Y2（C2O4）3：Eu3＋ as precursor.The effects of components and amount of compound molten salt,sintering temperature and time on the particle size,morphology and luminescent properties of Y2O3：Eu3＋ phosphor were mainly studied by XRD,SEM and luminescence spectrum.The results indicate that the suitable mol fraction content of NaCl is between 40%~45%（based on the total mol of compound molten salt）,the optimal mol ratio of the compound molten salt to precursor is 2~2.5,the best condition for roasting is 1 300 ℃ holding for 2 h and the peak intensity of the phosphor prepared is about 11% higher than that of the commercial phosphor.Meanwhile,the average diameter of Y2O3：Eu3＋ phosphor is about 1~3 μm,less than the commercial phosphor and the particles are well dispersed,nearly spherical shape and have no surface defects.