燃烧法制备CaO:Eu^(3+)荧光粉及其发光性能  

Combustion Synthesis and Luminescent Properties of CaO:Eu^(3+) Phosphor

作　　者：孙蓉[1] 刘军[1] 康明[1] 燕文清[1] 刘辉[1] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《西南科技大学学报》2009年第3期11-15,共5页Journal of Southwest University of Science and Technology

基　　金：国家自然科学基金项目(10476024);四川省科技厅项目(2006J13-059);西南科技大学培育基金(08zxxp10)

摘　　要：采用燃烧法合成红色荧光粉CaO:Eu3+,并利用X-射线衍射仪(XRD)、电子扫描电镜(SEM)、激光粒径分析仪和荧光光谱(PL-PLE)等研究了样品的结构、形貌、粒度以及煅烧温度和Eu3+离子掺杂量对样品发光性质的影响。结果表明:掺杂Eu3+作为发光中心占据了Ca2+离子的位置,但未改变基质CaO的立方晶型结构;样品颗粒基本上为球形结构,其平均粒径在0.4~3.0μm;Eu3+离子在晶格中处于两种不同的格位,即立方体心和正交体心,随着煅烧温度和Eu3+离子掺杂量的提高,样品的最大发射峰由592 nm(5D0→7F1)向614 nm(5D0→7F2)红移,这是由于立方/正交体心的比例减少以及Eu3+离子的对称环境的变化造成的。The CaO： Eu^3＋ phosphor was synthesized by combustion method and characterized by XRD, SEM, laser particle size analyzer and PL-PLE. The XRD suggested that the Eu^3＋ ion inhabited the site of Ca^2＋ as luminescent center without changing the crystal structure of cubic CaO. The SEM and laser particle size analyzer shows that the sample particles are in approximate spherical structure with size of 0.4 - 3.0μm. The PL analysis indicates that Eu^3＋ ions in host CaO has shown both cubic and orthorhombic centers and the luminescence properties depended significantly on the ratio of urea, the calcination temperature and the concentration of Eu^3＋. In particular, with increasing the calcination temperature and the Eu^3＋ ion content, the strongest emission peak is shift from 592 nm （5D0→7F1 ） to 614 nm （5D0→7F2） due to the decreasing of ratio of cubic/orthorhombic site and the symmetrical environment of Eu^3＋ ion.

关 键 词：CaO:Eu3+荧光粉 燃烧合成 发生性能 

分 类 号：O482.3[理学—固体物理]