摘要
用水热法制备了NaGdF4:Eu3+(0.5 mol%)发光材料,并研究了退火温度对NaGdF4:Eu3+的结构和发光性质的影响。X-射线粉末衍射(XRD)结果表明:水热合成得到六方相的NaGdF4,在空气氛的条件下,NaGdF4从六方相到立方相的相转变温度为～650℃.扫描电镜(SEM)的结果显示:具有六方相结构的NaGdF4:Eu3+发光材料的粒径为200～300nm.荧光光谱(PL)的结果表明:具有六方相结构的NaGdF4:Eu3+粉末样品的特征发射为Eu3+5 D0→7F2(615nm)跃迁发射。
NaGdF4 ：Eu3＋were prepared by a hydrothermal process and the effects of some processing variables such as annealing temperature and time,were investigated. The crystal structure, morphology and luminescent properties of the as-prepared NaGdF4：Eu3＋powders were characterized by X-ray powder diffraction（XRD）,scanning electron microscopy （SEM） and photoluminescence（PL）spectra. XRD results show that the phase transition of NaGdF4 ：Eu3＋ from the hexagonal phase to the cubic phase occurs at about 650~C in air. SEM images indicate that the diameter of the hexagonal NaGdF4：Eu3＋ mieroerystals is about 200-300 nm. PL results show that the characteristic emission of hexagonal NaGdF4 ：Eu3＋ powders is Eu3＋5D0→TF2 transition.
出处
《云南师范大学学报（自然科学版）》
2012年第1期8-11,共4页
Journal of Yunnan Normal University:Natural Sciences Edition
基金
云南省自然科学基金资助项目(2007B201M)
