CaMoO_4:Eu^(3+),Li^+红色荧光粉空心球的制备和发光性能  

Synthesis and Luminescence Properties of Hollow Spherical CaMoO_4:Eu^(3+),Li^+ Red Phosphors

作　　者：王夏[1] 何燕[1] 彭桂花[1] 梁振华[1] 吴京隆[1] 

机构地区：[1]广西师范大学化学化工学院药用资源化学与药物分子工程教育部重点实验室,桂林541004

出　　处：《材料研究学报》2012年第6期615-620,共6页Chinese Journal of Materials Research

基　　金：国家自然科学基金50962003和51102053资助项目~~

摘　　要：以硝酸钙、氧化铕、碳酸锂和钼酸铵为原料,用喷雾热解法合成了CaMoO_4:Eu^(3+),Li^+红色荧光粉。用X射线衍射、扫描电子显微镜和荧光光谱对样品的物相、显微形貌和发光性能进行了表征,研究了喷雾热解温度对发光性能的影响。结果表明,随着热解温度的升高样品的发光亮度先增后减,在400℃达到最大值,样品为四方晶系CaMoO_4,其显微形貌呈空心球形,平均球径为1.4μm;这种荧光粉样品可被395 nm的紫外光和465 nm的蓝光有效激发,发出617 nm的红光。Hollow spherical CaMoO4：Eu3＋, Li＋ red phosphors were synthesized by spray pyrolysis method, using calcium nitrate, europium oxide, lithium carbonate and ammonium molybdate as raw materials. The crystalline phase, morphology and luminescence properties of the obtained samples were characterized by X-ray diffraction, scanning electron microscopy and photoluminescence emission spectra, and the effects of the pyrolysis temperature were investigated. The results show that the emission intensity of the samples first strengthens, then decreases with the increase of pyrolysis temperature. The intensity of the sample pyrolyzed at 400  reaches a maximum value. At this pyrolysis temperature, a single phase of CaMoO4 can be obtained and the sample is composed of hollow spheres with an average size of 1.4 μm. The hollow spherical CaMoO4：Eu3＋, Li＋powders can be excited efficiently by ultraviolet light with the wavelength of 395 nm and visible blue light with the wavelength of 465 nm, and show a strong red emission of 617 nm.

关 键 词：无机非金属材料 红色荧光粉 喷雾热解 钼酸钙 空心球 

分 类 号：TB34[一般工业技术—材料科学与工程]