Hostname: page-component-5c6d5d7d68-tdptf Total loading time: 0 Render date: 2024-08-20T01:35:36.987Z Has data issue: false hasContentIssue false
  • English
  • Français

The development of porous microstructures during the dehydration of boehmite

Published online by Cambridge University Press:  05 July 2018

S. J. Wilson
S. J. Wilson*
Affiliation:
Department of Mineralogy and Petrology, University of Cambridge
Get access Rights & Permissions [Opens in a new window]

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.

Type
Research Article
Information
Mineralogical Magazine , Volume 43 , Issue 326 , June 1979 , pp. 301 - 306
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1979

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Alario-Franco, (M. A.), Fenerty, (J.), and Sing, (K. S. W.), 1972. Proc. 7th Int. Syrup. Reactivity of Solids, Bristol, ed. Anderson, (J. S.), Roberts, (M. W.), and Stone, (F. S.), 327-40.Google Scholar
Bosmans, (H.), 1966. Thesis. Leuven.Google Scholar
Bousquet, (J. L.), Dalmai-Imelik, (G.), and Leclercq, (C.), 1970. J. Microscopie. 9, 301-12.Google Scholar
de Boer, (J. H.), Houben, (G. M. M.), Lippens, (B. C.), Meijs, (W. H.), and Walrave, (W. K. A.), 1962. J. Catal. 1, 1-7.CrossRefGoogle Scholar
de Boer, (J. H.) and Lippens, (B. C.), 1964. Ibid. 3, 38-43.Google Scholar
Figlarz, (M.) and Vincent, (F.), 1968. Compt. Rend. Acad. Sci. Paris, 266C, 376-8.Google Scholar
Figlarz, (M.) Guenot, (J.), and Fievet-Vincent, (F.), 1976. J. Mat. Sci. 11, 2267-70.CrossRefGoogle Scholar
Figlarz, (M.) and Tournemolle, (J. N.), 1974. Ibid. 9, 772-6.Google Scholar
Giovanoli, (R.) and Brutsch, (R.), 1974. Chimia. 28, 188-91.Google Scholar
Giovanoli, (R.) Oswald, (H. R.), and Feitknecht, (W.), 1965. J. Microscopie. 4, 711-24.Google Scholar
Iler, (R. K.), 1961. J. Am. Ceram. Soc. 44, 618-24.10.1111/j.1151-2916.1961.tb11669.xCrossRefGoogle Scholar
Katz, (G.), Nicol, (A. W.), and Roy, (R.), 1969. Z. Kristallogr.. 130, 388-404.CrossRefGoogle Scholar
Kohn, (J. A.), Katz, (G.), and Broder, (J. D.), 1957. Am. Mineral. 42, 398-407.Google Scholar
Lippens, (B. C.), 1961. Thesis, Delft.Google Scholar
Lippens, (B. C.) and de Boer, (J. H.), 1964a. Acta Crystallogr. 17, 1312-21.10.1107/S0365110X64003267CrossRefGoogle Scholar
Lippens, (B. C.) 1964b. J. Catal. 3, 44-9.10.1016/0021-9517(64)90091-0CrossRefGoogle Scholar
McConnell, (J. D. C.) and Lima de Faria, (J.), 1961. Mineral. Mag. 32, 898-90l.Google Scholar
Milligan, (W. O.) and McAtee, (J. L.), 1956. J. Phys. Chem. 60, 273-7.10.1021/j150537a005CrossRefGoogle Scholar
Niepce, (J. C.), Mesnier, (M. T.), and Louer, (D.), 1977. J. Solid State Chem. 22, 341-51.CrossRefGoogle Scholar
Phillips, (V. A.), Opperhauser, (H.), and Kolbe, (J. L.), 1978. J. Am. Ceram. Soc. 61, 75-81.CrossRefGoogle Scholar
Rouquerol, (J.), Fraissard, (J.), Elston, (J.), and Imelik, (B.), 1966. J. Chim. Phys. 63, 607-10.CrossRefGoogle Scholar
Saalfeld, (H.), 1958. Clay Mineral. Bull. 3, 249-57.10.1180/claymin.1958.003.19.08CrossRefGoogle Scholar
Sirota, (N. N.) and Shokhina, (G. N.), 1974. Kristall und Technik. 9, 913-19.10.1002/crat.19740090808CrossRefGoogle Scholar
Stumpf, (H. C.), Russell, (A. S.), Newsome, (J. W.), and Tucker, (C. M.), 1950. Ind. Eng. Chem. 42, 1398-1403.10.1021/ie50487a039CrossRefGoogle Scholar
Swanson, (H. E.) and Fuyat, (R. K.), 1953. NBS Circular 539, vol. 3, 38.Google Scholar
Takada, (T.), Kiyama, (M.), and Shimizu, (S.), 1964. Bull. Inst. Chem. Res. Kyoto Univ. 42, 505-10.Google Scholar