实验用共沉淀法制备出不同铈掺杂浓度的钇铝石榴石(Y3-xAl5O12∶Cex)粉体.用综合热分析仪、X射线衍射仪、透射电镜、荧光光度计等测试手段对Y3-xAl5O12∶Cex前驱体及煅烧后的粉体进行了晶体结构、形貌和发光性能等方面的表征.研究表明:合成石榴石粉体的最佳煅烧温度应该在1050℃以上,用此方法可得到分散性好,形状规则且粒径为50 nm的石榴石粉体.随着Ce掺杂量的增加,样品的结构没有发生显著的变化,均为YAG相.只是衍射强度随着x的增加而增强.当x=0.20时,出现了CeO2相.Y3-xAl5O12∶Cex的激发光谱为双峰结构,在近紫外340 nm处有一激发峰,在可见光区有一最大激发峰在460 nm处.Ce3+的4f能级由于自旋耦合而劈裂为两个光谱支项2F7/2和2F5/2,其中2F5/2为基谱项.340 nm的激发峰对应2F5/2→5d的跃迁,460 nm的激发峰属于2F7/2→5d的跃迁.发射光谱都由一组尖峰组成,发射峰对应的波长在530 nm处.
参考文献
| [1] | Zych E;Brecher C;Wojtowicz AJ;Lingertat H;NICHOLAS COPERNICUS UNIV INST PHYS PL-87100 TORUN POLAND. .Luminescence properties of Ce-activated YAG optical ceramic scintillator materials[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,1997(3):193-203. |
| [2] | Lecoq P.;Korzhik M. .New inorganic scintillation materials development for medical imaging[J].IEEE Transactions on Nuclear Science,2002(4):1651-1654. |
| [3] | Borisevich A.;Korzhik M.;Lecoq P. .Luminescence of Ce doped oxygen crystalline compounds based on Hf and Ba[J].Nuclear Instruments and Methods in Physics Research, Section A. Accelerators, Spectrometers, Detectors and Associated Equipment,2003(1):206-209. |
| [4] | 李会利,刘学建,黄莉萍.固相反应法制备Ce：LuAG透明陶瓷[J].无机材料学报,2006(05):1161-1166. |
| [5] | Hui-Li Li;Xue-Jian Liu;Li-Ping Huang .Fabrication of Transparent Cerium-Doped Lutetium Aluminum Garnet (LuAG:Ce) Ceramics by a Solid-State Reaction Method[J].Journal of the American Ceramic Society,2005(11):3226-3228. |
| [6] | Martin Nikl;Jiri A. Mares;Natasha Solovieva;Hui-Li Li;Xue-Jian Liu;Li-Ping Huang;Ilaria Fontana;Mauro Fasoli;Anna Vedda;Carmelo D'Ambrosio .Scintillation characteristics of Lu_(3)Al_(5)O_(12):Ce optical ceramics[J].Journal of Applied Physics,2007(3):033515-1-033515-5-0. |
| [7] | Liu XJ;Li HL;Xie RJ;Hirosaki N;Xu X;Huang LP .Synthesis, characterization, and luminescent properties of Lu2O3 : Eu phosphors[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2007(2):469-473. |
| [8] | Pan, YX;Wu, MM;Su, Q .Tailored photoluminescence of YAG : Ce phosphor through various methods[J].The journal of physics and chemistry of solids,2004(5):845-850. |
| [9] | 石士考,王继业.甘氨酸燃烧合成YAG：Tb荧光粉的微观结构和发光特性[J].无机化学学报,2002(04):431-434. |
| [10] | ang, Y.C.;Lenggoro, I.W.;Park, S.B.;Okuyama, K. .Photoluminescence characteristics of YAG:Tb phosphor particles with spherical morphology and non-aggregation[J].The journal of physics and chemistry of solids,1999(11):1855-1858. |
| [11] | Y.H. Zhou;J. Lin;M. Yu;S.M. Han;S.B. Wang;H.J. Zhang .Morphology control and luminescence properties of YAG:Eu phosphors prepared by spray pyrolysis[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,2003(8):1289-1299. |
| [12] | 陈娇,黄啸谷,王丽熙,张其土.共沉淀法制备Al/Cr2O3复合粒子及其性能研究[J].稀有金属,2010(03):455-459. |
| [13] | 徐会兵,庄卫东,夏天,刘荣辉,陶冶,黄艳.PDP用（Y,Gd）BO3：Tb3+绿色荧光粉的合成及性能研究[J].稀有金属,2010(06):887-892. |
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