超声波均匀沉淀法制备Y_2O_3∶Eu^(3+)纳米晶及其荧光性能

Preparation and Luminescent Properties of Nanometer Y_2O_3∶Eu^(3+) by Ultrasonic-Homogeneous Precipitation Method

在超声波作用下,使用均匀沉淀法制备了纳米Y2O3∶Eu3+荧光粉,考察反应物配比、溶液pH值、反应时间、煅烧温度等制备条件对产物晶粒尺寸及产率的影响.利用X射线粉末衍射(XRD)、等离子体原子发射光谱(ICP-AES)、透射电镜(TEM)和荧光光谱等测试手段表征产物,结果表明,该法制得的纳米Y2O3∶Eu3+荧光粉颗粒为球形,粒度分布均匀,平均粒径约为30 nm.与微米晶相比,该纳米晶的激发光谱发生明显红移,电荷迁移态最大值(CTS)红移12 nm,发射光谱中发射主峰蓝移8 nm.

Nanometer Y2O3∶Eu3＋ powder was prepared by ultrasonic-homogeneous precipitation method. The effects of the material composition, pH, reaction time and calcination temperature on grain size and yield of the resulting particles were investigated. XRD, ICP-AES, TEM and fluorescence spectra were used to characterize the powders. The results show that the powders are spherical with good dispersion, their average size is 30 nm. Compared with the micron-scale Y2O3∶Eu3＋ ting in a red shift of 12 nm that maximum of in the emission spectrum. , the main excitation peak of the charge transfer state （ CTS）, and powders is around 251 nm, resul- the blue shift of 8 nm is observed