摘要
采用溶胶 -凝胶法合成了Gd2 O3:Eu纳米晶。利用X射线衍射 ,热重及差热分析和荧光光谱等测试手段对Gd2 O3:Eu的结晶过程、发光性质进行了研究。XRD结果表明 ,合成的样品在5 5 0℃开始结晶 ,晶粒随着温度的升高而长大 ,发光光谱测试表明 ,宽的主激发峰是由Eu3+电荷迁移态吸收与Gd3+离子的的激发峰重叠而成 ,主发射峰为 6 10nm ,它们的强度随烧结温度的提高而增强。
nanocrystals Gd_2O_3:Eu were synthesized by sol-gel me thod. X-ray diffraction, TG-DTA and photoluminescence spectra were used to chara cterize the procession of crystallinity and luminescence properties. The results of XRD indicated that the samples began to crystallize at 550℃ and the grain s izes increased with the increase of annealed temperatures. The results of lumine scence spectra indicated that the broad excitation bands belong to change transf er band of Eu 3+ and the excitation of Gd 3+, the main emissions peaks were at 610nm, the intensity increased with increase of annealed temperatures.
出处
《长春理工大学学报（自然科学版）》
2004年第4期4-6,共3页
Journal of Changchun University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金项目 (2 0 0 710 3 1)
