Microwave-Assisted Synthesis of LaPO<,4>: Ce, Tb and Phosphor Characterizations
A novel method was devised to prepare green phosphor of LaPO<,4>: Ce, Tb by the combination of co- precipitation and microwave irradiation. The effective hess of microwave as pre-treated process and after process and microwave irradiation time were mainly discussed. The formation process and structure of green phosphor of LaPO<,4>: Ce, Tb were characterized by TG-DTA, XRD and SEM, respectively. As a result, phosphor of monoclinic structure with widely distributed particle size about 70nm was successfully synthesized. The effect of microwave- assisted method as pretreatment and after-treatment on the structure and luminescent was studied property. Resuhs indicate that the after-treatment by microwave would enhance the crystallinity as well as fluorescence intensity, the fluorescence intensity increased with the time of microwave pretreatment time, the high fluorescence intensity was found at 80 min pretreatment time. Morphological structure of phosphor particles prepared by two methods seemed similar. The emission spectrum and excitation spectrum of phosphor as prepared detected by spectrophotometer showed typical luminescent of green phosphor, the luminescence mechanism was preliminarily discussed.
green phosphor rare earth phosphate doping microwave irradiation rare earths
Dong Limin(董丽敏) Zhang Yaoming(张耀明) Wu Ze(吴泽) Zhao Yuan(赵元) Han Zhidong(韩志东) Zhang Xianyou(张显友)
College of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China
国际会议
第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)
包头
英文
286-289
2007-08-07（万方平台首次上网日期，不代表论文的发表时间）