助溶剂对Ba_3Si_6O_(12)N_2:Eu^(2+)氮氧化物荧光粉制备及光学性能的影响（英文）  

Role of Fluxes in the Synthesis and Luminescence Properties of Ba_3Si_6O_(12)N_2:Eu^(2+) Oxynitride Phosphors by Microwave Sintering

作　　者：韩斌[1,2] 王义飞[2] 刘茜[3] 黄庆[2] 

机构地区：[1]上海大学材料研究所,上海200072 [2]中国科学院宁波材料技术与工程研究所,宁波315201 [3]中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室,上海200050

出　　处：《无机材料学报》2016年第6期652-660,共9页Journal of Inorganic Materials

基　　金：Zhejiang Provincial Natural Science Foundation of China(R12E020005,LQ14E020007);Natural Science Foundation of Ningbo(2013A610027);State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Chinese Academy of Sciences(SKL201307SIC);Research Fund for the Postdoctoral Advanced Program of Zhejiang Province(BSH1301022);Ningbo International Cooperation(2015D10009)

摘　　要：采用微波法制备了Eu^(2+)掺杂的Ba_3Si_6O_(12)N_2绿色氮氧化物荧光粉,着重研究了不同助熔剂:BaCl_2、H_3BO_3、KF和NH_4F对Ba_3Si_6O_(12)N_2:Eu^(2+)发光性能的影响。利用X射线衍射(XRD)、荧光光谱仪、扫描电子显微镜(SEM)和量子效率(QE)等检测方法研究了不同助溶剂的作用机理。研究结果表明:添加助溶剂能够显著提高荧光粉的发光强度,添加不同助溶剂制备荧光粉的发光强度大小依次为H_3BO_3>KF>BaCl_2>无助溶剂>NH_4F。当添加1.0wt%的H_3BO_3时,所制备的荧光粉粒径分布比较均匀,形貌较好,荧光粉的发光强度最大,且与不添加助溶剂制备的荧光粉相比,有较高的量子效率和吸收效率,不同温度下的发射光谱表明其热淬灭性低,荧光寿命较短。Eu2＋ activated Ba3Si6O12N2 oxynitride green phosphors were synthesized by microwave sintering method with the aid of fluxes, namely BaCl2, H3BO3, KF, and NH4F. We employed a combination of X-ray diffraction, photoluminescence spectra and scanning electron microscopy measurements, in conjunction with detailed quantum efficiency （QE）, life time and thermal quenching studies of luminescence properties to understand the origins of the improved luminescence properties. The results showed that the photoluminescence intensity of the phosphors was increased obviously by using varied fluxes and the intensity rise was recorded in order of fluxes as following： H3BO3 〉 KF 〉 BaCl2 〉 no flux 〉 NH4F. The maximum emission intensity of the Ba3Si6O12N2：Eu2＋ phosphor was achieved at containing 1.0wt% H3BO3, due to the high crystallinity, narrow particle-size distribution and smooth surface, which showed low thermal quenching, shorter life time and increased external quantum efficiency, compared with that of the sample with other fluxes or without flux.

关 键 词：氮氧化物荧光粉 助溶剂 微波烧结技术 量子效率 

分 类 号：TQ174[化学工程—陶瓷工业]