A study on the effect factors of sol-gel synthesis of yttrium aluminum garnet nanopowders
A study on the effect factors of sol-gel synthesis of yttrium aluminum garnet nanopowders
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溶胶-凝胶法合成钇铝石榴石纳米粉体影响因素研究
DOI：
10.1063/1.3341012
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发表时间：
2010-03
影响因子：
3.2
通讯作者：
Lin Yang, Tiecheng Lu, Hui Xu, Wei Zhang
中科院分区：
文献类型：
--
作者：
Lin Yang, Tiecheng Lu, Hui Xu, Wei Zhang
以硝酸铝、硝酸钇和柠檬酸为原料，分别以去离子水、乙醇和乙二醇为溶剂，采用溶胶-凝胶法合成了钇铝石榴石（YAG）纳米粉体。采用X射线衍射仪、粒度分布仪、傅里叶变换红外光谱仪、透射电子显微镜、热重-差示扫描量热仪等手段研究了粉末的成相过程、粒度分布状态、成分、形态特征和热行为。结果表明，前驱体凝胶和YAG粉末的形成和特性，如凝胶化速率，平均粒径和粉末团聚状态，强烈依赖于柠檬酸的化学计量的量，溶剂组合物，和预煅烧过程。在柠檬酸与硝酸盐的比例为3、乙醇溶剂存在下，通过800 ℃煅烧2 h，得到了结晶度高、分散性好的YAG纳米粉体。通过对实验结果的分析，结合溶胶-凝胶化学、DLVO理论和空间位阻效应，讨论了柠檬酸的化学计量比、溶剂组成和预煅烧工艺对前驱体凝胶和YAG粉体的形成和特性的影响。同时，提出了溶胶-凝胶法合成纳米晶的整体机理。
Yttrium aluminum garnet (YAG) nanopowders were synthesized by sol-gel method using aluminum nitrate, yttrium nitrate, and citric acid as starting materials, de-ionized water, ethanol, and ethylene glycol as solvents, respectively. The phase formation process, state of particle size distribution (PSD), compositions, morphological characteristics, and thermal behavior of the powders were investigated by means of x-ray diffractometry, PSD, Fourier transform infrared, transmission electronic microscope, and thermogravimetry-differential scanning calorimetry. Results indicate that the formation and characteristics of precursor gel and YAG powder, such as the rate of gelation, average particle size, and powder agglomerate state, strongly depend on the stoichiometric amount of citric acid, the solvent composition, and the precalcination process. Highly crystalline, well-dispersed YAG nanopowder was obtained by calcining at 800 degrees C for 2 h in the presence of citric acid to nitrate ratio of 3, ethanol solvent, and precalcination process. According to the analysis of experimental results, sol-gel chemistry, DLVO theory, and steric effect, the effects of stoichiometric amount of citric acid, solvent composition, and precalcination process on the formation and characteristics of precursor gel and YAG powder have been discussed. Meanwhile, the overall synthesis mechanism in sol-gel method has been suggested.
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影响因子：
4
作者：
Y. Kang;I. Lenggoro;Seung-Bin Park;K. Okuyama
通讯作者：
Y. Kang;I. Lenggoro;Seung-Bin Park;K. Okuyama
DOI：
10.1109/cleo.2007.4452868
发表时间：
2006-06
期刊：
2007 Conference on Lasers and Electro-Optics (CLEO)
影响因子：
--
作者：
A. Ikesue;Y. Aung
通讯作者：
A. Ikesue;Y. Aung
影响因子：
--
作者：
Xianzhong Guo;P. Devi;B. Ravi;J. Parise;S. Sampath;J. Hanson
通讯作者：
Xianzhong Guo;P. Devi;B. Ravi;J. Parise;S. Sampath;J. Hanson
DOI：
10.1016/j.jeurceramsoc.2005.04.021
发表时间：
2006-01-01
影响因子：
5.7
作者：
Hua, Zile;Wang, Xin M.;Shi, Jianlin
通讯作者：
Shi, Jianlin
影响因子：
3
作者：
Zhou, YH;Lin, J;Zhang, HJ
通讯作者：
Zhang, HJ