共沉淀法制备Ce、Pr共掺杂GAGG粉体及发光特性
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摘要
用化学共沉淀法一次煅烧工艺制备Ce,Pr∶GAGG粉体,利用XRD、SEM、荧光光谱仪等对样品表面形貌及发光性能进行表征,研究煅烧温度、沉淀剂引入草酸根对粉体发光性能的影响。结果表明,前驱体经950℃煅烧3 h后全部转变为GAGG相,Pr~(3+)、Ce~(3+)共掺未改变基质的物相结构;沉淀剂引入草酸铵后,粉体发射光谱积分强度由333 573 a.u上升至420 894 a.u,沉淀剂引入草酸根能提高粉体的发光性能。荧光寿命测试表明,在Ce∶GAGG中掺入Pr~(3+)可使Ce~(3+)的荧光寿命降低,衰减时间为35.43 ns。
The Ce,Pr∶ GAGG powders were prepared by chemical co-precipitation and one step calcinations. The surface morphologies and luminescence properties of the samples were analyzed by XRD,SEM and fluorescence spectrometer. The effects of calcination temperature and the introduction of oxalate into precipitant on the luminescent properties of powders were investigated. The results showed that the precursor transformed into GAGG phase after being calcined at 950 ℃ for 3 h.The co-doping of Pr~(3+)and Ce~(3+)did not change the phase structure of the matrix. After the precipitation agent was introduced into ammonium oxalate,the emission spectrum intensity of the powder increased from 333 573 a. u to 420 894 a. u,precipitation agent introduced oxalate can improve powder luminescence performance. The fluorescence lifetime test showed that the incorporation of Pr~(3+)in Ce∶ GAGG can reduce the fluorescence lifetime of Ce~(3+)and the decay time is 35. 43 ns.
The Ce,Pr∶ GAGG powders were prepared by chemical co-precipitation and one step calcinations. The surface morphologies and luminescence properties of the samples were analyzed by XRD,SEM and fluorescence spectrometer. The effects of calcination temperature and the introduction of oxalate into precipitant on the luminescent properties of powders were investigated. The results showed that the precursor transformed into GAGG phase after being calcined at 950 ℃ for 3 h.The co-doping of Pr~(3+)and Ce~(3+)did not change the phase structure of the matrix. After the precipitation agent was introduced into ammonium oxalate,the emission spectrum intensity of the powder increased from 333 573 a. u to 420 894 a. u,precipitation agent introduced oxalate can improve powder luminescence performance. The fluorescence lifetime test showed that the incorporation of Pr~(3+)in Ce∶ GAGG can reduce the fluorescence lifetime of Ce~(3+)and the decay time is 35. 43 ns.
引文
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[2]江东亮.透明陶瓷---无机材料研究与发展重要方向之一[J].无机材料学报,2009,24(5):873-881.JIANG D L.Transparent ceramics:one of the most important field of research and development of inorganic materials[J].J.Inorg.Mater.,2009,24(5):873-881.(in Chinese)
[3]巴学巍,柏朝晖,张希艳.闪烁陶瓷材料的研究进展[J].材料导报,2005,19(8):25-27.BA X W,BAI C H,ZHANG X Y.Research progress in ceramic scintillators[J].Mater.Rev.,2005,19(8):25-27.(in Chinese)
[4]李江,陈肖朴,寇华敏,等.石榴石闪烁材料的研究进展[J].硅酸盐学报,2018,46(1):116-127.LI J,CHEN X P,KOU H M,et al..Recent development on garnet single crystal and ceramic scintillators[J].J.Chin.Ceram.Soc.,2018,46(1):116-127.(in Chinese)
[5]LUO Z H,JIANG H C,JIANG J.Synthesis of cerium-doped Gd3(Al,Ga)5O12powder for ceramic scintillators with ultrasonic-assisted chemical coprecipitation method[J].J.Am.Ceram.Soc.,2013,96(10):3038-3041.
[6]SUN Y,YANG S H,ZHANG Y,et al..Co-precipitation synthesis of gadolinium aluminum gallium oxide(GAGG)via different precipitants[J].IEEE Trans.Nucl.Sci.,2014,61(1):306-311.
[7]QIN H M,TAN X J,HUANG W C,et al..Application of urea precipitation method in preparation of advanced ceramic powders[J].Ceram.Int.,2015,41(9):1598-11604.
[8]CHEN X Q,QIN H M,WANG X J,et al..Sintering and characterization of Gd3Al3Ga2O12/Y3Al5O12layered composite scintillation ceramic[J].J.Eur.Ceram.Soc.,2016,36(10):2587-2591.
[9]高玮,古宏晨.稀土草酸盐沉淀过程中颗粒大小的控制[J].稀土,2000,21(1):11-13.GAO W,GU H C.Control of mean particle size of rare earth oxalate in precipitation process[J].Chin.Rare Earths,2000,21(1):11-13.(in Chinese)
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[12]孔丽,甘树才,洪广言,等.Pr3+或Sm3+掺杂YAG∶Ce的发光特性及其荧光寿命[J].发光学报,2007,28(3):393-396.KONG L,GAN S C,HONG G Y,et al..Luminescence properties of YAG∶Ce co-doped with Pr3+or Sm3+[J].Chin.J.Lumin.,2007,28(3):393-396.(in Chinese)
[13]LUO Z H,LIU Y F,ZHANG C H,et al..Effect of Yb3+on the crystal structural modification and photoluminescence properties of GGAG∶Ce3+[J].Inorg.Chem.,2016,55(6):3040-3046.
[14]CHEN X Q,QIN H M,ZHANG Y,et al..Fabrication of cerium-doped nonstoichiometric(Ce,Lu,Gd)3+xδ(Ga,Al)5-δO12transparent ceramics[J].J.Rare Earths,2015,33(8):863-866.
[15]ZHANG Q H,LU T C,WEI N,et al..Synthesis of pure-phase uranium-doped YAG powder via co-precipitation method[J].Mater.Lett.,2016,188:396-398.
[16]LUO Z H,JIANG H C,JIANG J,et al..Microstructure and optical characteristics of Ce∶Gd3(Ga,Al)5O12ceramic for scintillator application[J].Ceram.Int.,2015,41(1):873-876.
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[22]ASAMI K,UEDA J,TANABE S.Trap depth and color variation of Ce3+-Cr3+co-doped Gd3(Al,Ga)5O12garnet persistent phosphors[J].Opt.Mater.,2016,62:171-175.