Gd_2O_2SO_4∶Eu^(3+)荧光粉的湿化学法合成及发光性能  

Wet Chemical Synthesis and Luminescence Properties of Eu^(3+) Ions Doped Gadolinium Oxysulfate Phosphor

作　　者：李娜娜[1] 叶灵敏 郭淑娟[1] 连景宝[1] 

机构地区：[1]辽宁石油化工大学机械工程学院,抚顺113001

出　　处：《中国陶瓷》2016年第4期69-73,共5页China Ceramics

基　　金：辽宁省教育厅项目(L2014149);辽宁石油化工大学大学生创新创业训练计划项目(201510148010)

摘　　要：采用氧化钆、氧化铕、硝酸、硫酸铵和氨水为实验原料,通过湿化学法合成了Gd_2O_2SO_4∶Eu^(3+)荧光粉。研究表明硫酸根离子与钆离子的摩尔比(m)对合成产物的物相组成影响很大,较优的m值为15,该m值合成的前驱体在马弗炉中800℃煅烧2 h能转化为单相Gd_2O_2SO_4粉体。该Gd_2O_2SO_4粉体呈准球形,团聚较严重,粒径尺寸大小为1~2μm之间。在270 nm的紫外光激发下,Gd_2O_2SO_4∶Eu^(3+)荧光粉呈现红光发射,主发射波长位于620 nm附近。Eu^(3+)离子的猝灭浓度为15 mol%。Gd_2O_2SO_4∶ Eu^3＋ phosphor was successfully synthesized through a wet chemical synthesis method using Gd_2O_3, Eu_2O_3, HNO_3,（NH_4）SO_4^（-2） and NH_3·H_2O as the starting materials. It was found that the phase compositions of the synthesized products are strongly dependent on m value, namely, the molar ratio of SO42- to Gd3＋ ions. The appropriate m value is 15. The precursor synthesized at the m value of 15 can be converted into single phase Gd_2O_2SO_4 at a temperature higher than 800 ℃ for 2 h in muffle furnace. The as prepared Gd_2O_2SO_4 powder particles are quasi spherical in shape and serious aggregation with particle size range of about 1 ~ 2 μm. Under the 270 nm UV light excitation, the strongest emission peak for Gd_2O_2SO_4∶ Eu^3＋ phosphor is located at 620 nm, which corresponds to red light emission. The quenching concentration of Eu^3＋ ions is 15 mol%.

关 键 词：硫酸氧化钆 荧光粉 湿化学合成 发光性能 

分 类 号：TQ174[化学工程—陶瓷工业] O482.31[化学工程—硅酸盐工业]