Sr6La4（SiO4）2（PO4）4O2:xEu2+,yMn2+荧光粉的制备及性能  

Synthesis and Properties of Sr6La4（SiO4）2（PO4）4O2:xEu2+,yMn2+ Phosphor

作　　者：于灏君 王宝辰[1] 刘艳改[1] 夏宇飞 黄朝晖[1] 房明浩[1] YU Haojun;WANG Baochen;LIU Yangai;XIA Yufei;HUANG Zhaohui;FANG Minghao(School of Materials Science and Technology,Beijing Key Laboratory of Materials Utilization of No nmetallic minerals and Solid Wastes,National Laboratory of mineral Materials,China University of Geosciences,Beijing 100083,China)

机构地区：[1]中国地质大学(北京)材料科学与工程学院非金属材料和固废资源材料利用北京市重点实验室矿物材料国家专业实验室

出　　处：《硅酸盐学报》2018年第12期1771-1779,共9页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51472223);国家自然科学基金(51772278);中央大学基础研究基金(2652015020)资助

摘　　要：采用高温固相法制备Sr6La4(SiO4)2(PO4)4O2:xEu^2+,yMn^2+荧光粉。通过X射线粉末衍射和结构精修研究了其物相组成和晶体结构以及该荧光粉的激发光谱、发射光谱、漫反射光谱、荧光热稳定性等发光性能。结果表明:该荧光粉具有磷灰石结构,Eu^2+和Mn^2+可占据结构中的2种阳离子格位。当Eu2+的掺杂量为1%(摩尔分数)、Mn^2+的掺杂量为2%时,此荧光粉发光性能最好;荧光粉的发射光谱为450~550 nm的宽发射带,峰值位于478 nm,其激发光谱为220~400 nm的宽激发带,峰值位于302 nm,其色坐标值为(0.203 5,0.307 8);Mn^2+的掺杂有效的促进了荧光粉对近紫外光区域的吸收。当温度提升至150℃,Sr6La4(SiO4)2(PO4)4O2:0.01Eu^2+和Sr6La4(SiO4)2(PO4)4O2:(0.01Eu^2+,0.02Mn^2+)荧光粉的发射光谱强度分别为室温的34.46%和51.79%;Mn^2+的掺杂显著提升了其热稳定性。Sr6La4(SiO4)2(PO4)4O2: x Eu^2+, y Mn^2+ phosphors were synthesized by a high-temperature solid-state method. The phase composition and crystal structure were investigated by X-ray powder diffraction and structural refinement. The as-prepared phosphors were characterized via the measurements of luminescence excitation, emission spectra and diffuse reflectance spectra and luminescence decay curves. The Sr6La4(SiO4)2(PO4)4O2:(0.01Eu2+, 0.02Mn2+) phosphor has an optimum luminescence performance. The Eu^2+ and Mn^2+ ions occupy two cationic sites in the oxyapatite phosphor. The results show that the phosphor can be efficiently excited by n-UV-Vis light in abroad range of 220-400 nm, exhibiting the broad emission spectra at 450-500 nm, peaking at 478 nm. The Commission Internationale de L’Eclairage(CIE) chromaticity coordination of the phosphor is(0.2035, 0.3078). The doping of Mn2+promotes the absorption of phosphor to the near-ultraviolet region. The emission intensities of Sr6La4(SiO4)2(PO4)4O2: 0.01 Eu^2+and Sr6La4(SiO4)2(PO4)4O2:(0.01Eu^2+,0.02 Mn^2+) phosphors at 150 ℃ are just 34.46% and 51.79% at room temperature, respectively, indicating that the doping of Mn^2+ could improve the thermal stability.

关 键 词：磷灰石 荧光粉 高温固相法 铕离子 锰离子 

分 类 号：O482.31[理学—固体物理]