纳米晶CaWO_4∶Pr^(3+)的制备和发光性质研究  

Study on Preparation and Luminescent Properties of Nanocrystalline CaWO_4∶ Pr^(3+)

作　　者：姜晓岚[1] 孙大为 韩建[1] JIANG Xiao-lan;SUN Da-wei;HAN Jian(College of Electronic Science,Northeast Petroleum University)

机构地区：[1]东北石油大学电子科学学院

出　　处：《化工自动化及仪表》2018年第12期960-963,共4页Control and Instruments in Chemical Industry

基　　金：国家自然科学基金项目(51574087)

摘　　要：使用共沉淀法制备纳米级蓝绿粉CaWO_4∶Pr^(3+),XRD测试样品结果为体心四方晶系。CaWO_4∶Pr^(3+)荧光体激发谱显示WO_4^(2-)电荷迁移跃迁和Pr^(3+)典型4f-4f激发跃迁,室温发射光谱显示Pr^(3+)能够被很好地激发,最强峰位于490nm处,且在257nm光激发下出现基质本征宽带,410nm是其中心位置,用257、449nm光分别激发样品并观测发射谱,可推断能量由基质传递给了稀土离子,导致前者发光强度高于后者。Adopting chemical co-precipitation method to prepare blue-green nanocrystalline CaWO 4∶Pr 3+was implemented and XRD results show that,the specimen’s structure is a body-centered tetragon crystal with single phase;and the CaWO 4∶Pr 3+phosphor excitation spectrum demonstrates a WO 4 2-charge transfer and Pr 3+excitation 4f-4f transitions.The indoor temperature emission spectra shows that Pr 3+can be activated;the emission peak stays at 490nm and the base intrinsic broadband appears when to be excited by 257nm UV and 410nm can be regarded as its central position.Adopting 257nm and 449nm UV respectively to activate the nanocrystalline CaWO 4∶Pr 3+indicates that,the energy can be delivered to rare earth irons from the substrate and this leads to the former’s luminous intensity higher than that of the latter.

关 键 词：CaWO4∶Pr3+ 光致发光 

分 类 号：TB383[一般工业技术—材料科学与工程]