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Progress in Natural Science Volume 17, 2007 - Issue 7
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Original Articles

Synthesis and thermodynamic analysis of nano-La2O3

Liu Lili Department of Physical Chemistry, University of Science and Technology Beijing, Beijing, 100083, China; National Institute Materials Science, Segen 1-2-1, Tsukuba, 305-0047, Jpan
,
Tang Jie National Institute Materials Science, Segen 1-2-1, Tsukuba, 305-0047, Jpan
,
Li Yuxiang Department of Physical Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
,
Zhang Mei Department of Physical Chemistry, University of Science and Technology Beijing, Beijing, 100083, ChinaCorrespondence[email protected]
&
Wang Xidong Department of Physical Chemistry, University of Science and Technology Beijing, Beijing, 100083, China; College of Engineering, Beijing University, Beijing, 100871, China
Pages 838-844 | Accepted 26 Dec 2006, Published online: 10 Aug 2007
 

Abstract

The thermodynamic parameters of La(NO3)3 and La(OH)3 are evaluated and the thermodynamics of nano-La2O3 synthetic process is analyzed. On the base of thermodynamic analysis, La2O3 nano-powders are prepared by the sol-gel method and experiment scheme is designed by an orthogonal method. The dry-gelatin is analyzed with different thermal analysis/thermo-gravimetric analysis (THA-DTA) and X-ray diffraction method. The microstructure of nano-La2O3 particles are experimentally examined and analyzed. All the results indicate that nano-La2O3 particles well-dispersed are obtained and the average grain size is in the range of 20–50 nm.

*Supported by National Natural Science Foundation of China (Grant Nos. 50402022, 50425415 and 50672006)

Notes

*Supported by National Natural Science Foundation of China (Grant Nos. 50402022, 50425415 and 50672006)

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