The Preparation of Boehmite and a-Alumina Powders by Hydrothermal Synthesis from Aluminium Metal

Panda, PK and Jaleel, VA and Ushadevi, S and Kannan, TS (1994) The Preparation of Boehmite and a-Alumina Powders by Hydrothermal Synthesis from Aluminium Metal. In: Advances in High Pressure Science and Technology. Tata McGraw-Hill Publishing Company Limited, New Delhi, pp. 249-255.

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Abstract

Hydrothermal oxidation of aluminium metal has been effected in the temperature and pressure ranges of 300-550°C and 10-120 MPa respectively. While boehmite and a-alumina form at the extremities of these temperatures and pressures respectively, at intermediate temperatures their mixtures are obtained. The products which had average particle sizes in the range of 4-15 pm were further characterised by XRD, IR spectroscopy, and6y SEM observations. The quantity of metal reacting with unit volume of water shows three regions having distinctly different slopes in the temperature ranges of 300- 350°C, 350-450°C and 450-550'~ corresponding to the formation of fully crystalline forms of boehmite, boehmite + a-alumina and a-alumina respectively.

Item Type: Book Section
Additional Information: Copyright to this article belongs to M/s. Tata McGraw-Hill Publishing Company Limited
Uncontrolled Keywords: Aluminium metal;Hydrothermal Synthesis;Hydrothermal oxidation;Solid aluminium
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Users 11 not found.
Date Deposited: 27 Nov 2012 04:17
Last Modified: 27 Nov 2012 04:17
URI: http://nal-ir.nal.res.in/id/eprint/11368

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