在超声波作用下以均匀沉淀法合成了纳米荧光粉Eu0.12Y1.78Ca0.10O3-δ,用X射线衍射仪(XRD)、能谱分析仪(EDS)、等离子体原子发射光谱(ICP-AES)、透射电镜(TEM)对其进行表征,利用不同升温速率的差热-热重分析(DTA-TG)研究了纳米荧光粉Eu0.12Y1.78Ca0.10O3-δ的合成动力学.研究表明,合成的Eu0.12Y1.78Ca0.10O3-δ为体心立方Y2O3结构,球形纳米多晶,平均粒径约20nm,其前驱体为六方相Y(OH)3,利用Doyle-Ozawa法和Kissinger法计算得到前驱体三个分解阶段的表观活化能平均值分别为102.06、488.00、302.74kJ/mol.用Kissinger法确定了反应级数和频率因子,确定了三个反应阶段的速率方程分别为da/dt=8.86×10(8)e-12280/T(1-α)1.36.da/dt=4.05×10(33)e-58700/T(1-α)1.32.da/dt--7.14×10(19)e-36010/T(1-α)1.27.
参考文献
| [1] | Kwon M S,Park H L,Kiin T W,et al.Sol-Gel synthesis and luminescence property of nanocrystalline Y2O3:Eu phosphor using metal nitrate precursors.Metals Mater.Int.,2006,12(3):263-267. |
| [2] | Jung K Y,Lee C H,Kang Y C.Effect of surface area and crystallite size on luminescent intensity of Y2O3:Eu phosphor prepared by spray pyrolysis.Mater.Lett.,2005,59(19/20):2451-2456. |
| [3] | Vu N Y,Anh T K,Yi G C,et al.Photoluminescence and cathodo-luminescence properties of Y2O3:Eu nanophosphors prepared by combustion synthesis.J.Lumin.,2007,122/123:776-779. |
| [4] | Dutta S,Mohammad Q,Manoharan S S.Luminescent properties of Eu3+/Y2O3 ultrafme powders prepared by rapid microwave-combustion route.J.Mater.Sci.Lett.,2002,21(14):1077-1079. |
| [5] | Yin S,Shinozaki,M,Sato T.Synthesis and characterization of wire-like and near-spherical Eu2O3-doped Y2O3 phosphors by sol-vothermal reaction.J.Lumin.,2007,126(2):427-433. |
| [6] | Hirai T,Asada Y,Komasawa I.Preparation of Y2O3:Eu3+ nanopar-ticles in reverse micellar systems and their photoluminescence properties.J.Col.Inter.Sci.,2004,276(2):339-345. |
| [7] | Zhang M,Li X H,Wang Z X,et al.Synthesis of Y2O3:Eu3+ phos-phors by surface diffusion and their photoluminescence properties.Tran.Non.Met.Soc.Chin.,2010,20(1):115-118. |
| [8] | 杨琪,胡文彬(YANG Qi,et al).水热合成的纳米γ-AIOOH的热分解动力学.无机材料学报(Journal of Inorganic Materials),2010,25(1):96-100. |
| [9] | 景殿策,王宝和,张伟,等(JING Dian-Ce,et al).纳米氢氧化镁粉体的制备及热分解动力学研究.中国粉体技术(China Powder Science and Technology),2006,12(5):24-27. |
| [10] | 宋晓岚,何希,杨海平,等.沉淀法合成的纳米CeO2前驱体的热分解动力学.中南大学学报(自然科学版),2007,38(3):428-432. |
| [11] | 田俐,陈稳纯,陈琳,等(TLAN Li,et al).水热法合成氢氧化忆纳米管.无机材料学报(Jounal of Inorganic Materials),2009,24(2):335-339. |
| [12] | Chong M K,Pita K,Kam C H.Photoluminescence of Sol-Gel de-rived Y2O3:Eu3+ thin-film phosphors with Mg2+ and Al3+ co-doping.Appl.Phys.A,2004,79(3):433-437. |
| [13] | Wang H R,Gao Y L,Ye Y F,et al.Crystallization kinetics of an amorphous Zr-Cu-Ni alloy:calculation of the activation energy.J.Alloys Compd.,2003,353(1/2):200-206. |
| [14] | 蔡正千.热分析.北京:高等教育出版社,1993:113-115. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%