Synthesis of high-purity α-Al2O3 from boehmite obtained by hydrothermal oxidation of aluminum

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• 作者：M. S. Vlaskin ; A. V. Grigorenko ; A. Z. Zhuk ; A. V. Lisitsyn…
• 刊名：High Temperature
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：54
• 期：3
• 页码：322-329
• 全文大小：1,924 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Atoms and Molecules in Strong Fields and Plasma Physics
  Materials Science
  Mechanics, Fluids and Thermodynamics
  Physical Chemistry
  Industrial Chemistry and Chemical Engineering
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-3156
• 卷排序：54

文摘

We demonstrate the possibility of obtaining high-purity aluminum oxide by successive processes of hydrothermal oxidation of aluminum and vacuum heat treatment of the solid oxidation product (boehmite). The results of studies of changes in the structural properties and chemical purity of alumina samples obtained in the different modes of vacuum heat treatment of boehmite are presented. Experiments have shown the ability to produce alumina with a purity of 99.997% (the total content of all impurities is approximately 30 ppm) of aluminum with a purity of 99.8%. It was shown that the chemical purity of the final product depends on not only the temperature and time of heat treatment but also a number of other parameters of the process.Original Russian Text © M.S. Vlaskin, A.V. Grigorenko, A.Z. Zhuk, A.V. Lisitsyn, A.E. Sheindlin, E.I. Shkol’nikov, 2016, published in Teplofizika Vysokikh Temperatur, 2016, Vol. 54, No. 3, pp. 343–351.