以金属硝酸盐和EDTA为原料,用EDTA络合溶胶-凝胶法制备出Y2O3:Eu纳米晶,并对合成条件进行了优化.分别用TG-DTA、FTIR、XRD、SEM、荧光分光光度计等手段对凝胶的热分解机理,Y2O3:Eu的形成过程以及纳米晶的性质进行了研究.结果表明:硝酸根离子可以加速EDTA凝胶的热分解,仅在600℃焙烧即可得到颗粒细小、组分均匀,纯立方相的’Y2O3:Eu纳米晶,颗粒基本呈球形,粒径随温度升高逐渐长大,600℃时,约为20nm,1000℃时,约为70nm.
Nanocrystal Y2O3:Eu was synthesized by the EDTA complexing sol-gel method at lower temperature using metal nitrate and EDTA as raw materials, the synthesis
condition was optimized. The pyrolytic decomposition mechanism of the gel, formation process of Y2O3:Eu and the properties of the particles were investigated
by TG-DTA, XRD, FTIR, SEM, Fluorescence Spectrophotometer. The results show that nitrate ions accelerate the decomposition of the EDTA-gel, and fine, homogenous, pure
cubic phase Y2O3:Eu nanocrystal can be produced after the dry gel calcinated at 600℃ for 2h. The nanoparticles of the Y2O3:Eu are basically
spherical in shape, about 20nm and 70nm in size respectively at 600℃ and 1000℃.
参考文献
| [1] | Verstegen J M P J, Radielovic D, Vrenken L E. J. Electrochem. Soc., 1974, 121(12): 1627--1631. [2] 徐燕, 黄锦裴, 王惠琴, 等. 发光与显示, 1981, 1: 52--61. [3] Willians D K, Bihari B, Brian M. J. Phys. Chem. B, 1998, 102(6): 916--920. [4] 李沅英, 戴德昌, 蔡少华. 光电子：激光, 1995, 6(9): 增刊597--602. [5] 轶惠慧, 刘行仁. 发光学报, 1996, 17(3): 52--56. [6] 王惠琴, 徐燕, 胡建国, 等. 第六届全国发光学学术会议论文集, ?合肥. 1992. 324--326. [7] 王惠琴, 胡建国, 徐燕, 等. 复旦学报(自然科学版), 1995, 34(5): 521--525. [8] 谢平波, 段昌奎, 张慰萍, 等. 发光学报, 1998, 19(2): 123--127. [9] Shea L E, Mckittrick J, Lopez O A. J. Am. Ceram. Soc., 1996, 79(12): 3257--3265. [10] 黄贡, 徐日长, 钮建晶, 等. 第六届全国发光学学术会议论文文?集, 合肥. 1992. 327. [11] Li Qiang, GAO Lian, Yan Dongsheng. Chem. Mater., 1999, 11(3): 533--535. [12] Dowy A, Odier P. Mater. Res. Bull., 1989, 24: 1119--1126. [13] 李强, 高濂, 严东生(LI Qiang, et al). 无机材料学报(Journal of Inorganic Materials), 1997, 12(2): 237--241. [14] 董相庭, 刘桂霞, 孙晶. 稀有金属材料与工程, 2001, 30(1): 73--76. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%