Pr掺杂12CaO·7Al_2O_3陶瓷材料的发光特性  

Luminescent Properties of Pr-doped 12CaO·7Al_2O_3 Ceramics

作　　者：毛玉琴[1] 蒲永平[1,2] 韦继锋[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,西安710021 [2]教育部轻工助剂化学与技术重点实验室,西安710021

出　　处：《人工晶体学报》2011年第2期455-458,464,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51072106);教育部科学技术研究重点项目(209126);陕西科技大学研究生创新基金;陕西省教育厅科研专项基金(112H011)

摘　　要：采用传统高温固相反应法制备了12CaO·7Al2O3∶Pr3＋（C12A7∶Pr3＋）陶瓷,采用X射线粉末衍射（XRD）、电子扫描电镜（SEM）、激发光谱和发射光谱对样品的物相结构及发光性能进行了分析和表征。结果表明：C12A7∶Pr3＋陶瓷样品的衍射峰与C12A7的JCPDS卡片的衍射峰数据一致,属于立方晶系。激发光谱分布在440~490 nm的波长范围内,主激发峰位于488 nm处;发射光谱为多发射峰,最大发射峰位于615 nm处,是典型的Pr3＋的4f-4f和4f-5d激发产生能级跃迁导致的。随着Pr3＋掺杂量的增加,发光强度先增强后减弱,当掺杂浓度为0.2 mol%时,在615nm处发射峰强度达到最大。Pr-doped 12CaO·7Al2O3（C12A7∶Pr3＋） ceramics were prepared by high temperature solid state reaction method.The phase structure and luminescent properties of the powders were investigated by X-ray diffraction（XRD）,scan electron microscope（SEM）,excitation spectra and emission spectra.The results show that the diffraction peaks of prepared C12A7∶Pr3＋ ceramic samples were the same as the JCPDS date of C12A7,which indicated the C12A7∶Pr3＋ belongs to cubic system.The excitation spectra of C12A7∶Pr3＋ is a multi-peak in the range of 440-490 nm and the strongest peak is at 488 nm.The emission spectra is also a multi-peak,the strongest peak is at 615 nm.It＇s ascribed to Pr3＋ typical transition from 4f to 4f and 4f to 5d.Luminescence intensity increased firstly then reduced with Pr3＋ doping concentration increasing.With the addition of 0.2 mol% Pr3＋,the emission pesk intensity reached the maximum value at 615 nm.

关 键 词：高温固相反应 12CaO·7Al2O3:Pr3+ 激发和发射光谱 发光特性 

分 类 号：TQ174[化学工程—陶瓷工业]