The Development of Porous Microstructures During the Dehydration of Boehmite

S. J. Wilson
Department of Mineralogy and Petrology, University of Cambridge

Summary: Electron-microscope observations have been used to follow the low-temperature dehydration of boehmite, and show that a coherent skeleton of γ-Al2O3 with a porous texture is produced. For material fired in air the development of a number of pore systems is described. Of these the most important, as far as the dehydration process is concerned, is a lamellar pore system parallel to (001)γ and having a regular spacing of the order of 35–40. Å. A much faster dehydration process is induced by exposure to the electron beam and results in the formation of a more randomly oriented pore structure. The observed microstructure and the calculated internal surface area are compared with the results of previous adsorption studies.

Mineralogical Magazine; June 1979 v. 43; no. 326; p. 301-306; DOI: 10.1180/minmag.1979.043.326.14
© 1979, The Mineralogical Society
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