Hostname: page-component-84b7d79bbc-lrf7s Total loading time: 0 Render date: 2024-07-26T06:32:45.010Z Has data issue: false hasContentIssue false
  • English
  • Français

Characterization of aluminosilicate (mullite) precursors prepared by a mechanochemical process

Published online by Cambridge University Press:  31 January 2011

J. Temuujin ,
K. Okada  and
K. J. D. MacKenzie
J. Temuujin
Affiliation:
Institute of Chemistry of the Mongolian Academy of Sciences, Ulaanbaatar 51, Mongolia
K. Okada
Affiliation:
Department of Inorganic Materials, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152, Japan
K. J. D. MacKenzie
Affiliation:
New Zealand Institute for Industrial Research and Development, Lower Hutt, New Zealand
Get access

Abstract

Aluminosilicate precursors were prepared by mechanochemical treatment of gibbsitesilica gel mixtures. The effect of grinding on their structure and thermal behavior has been examined by 27Al and 29Si MAS NMR, x-ray diffraction (XRD), differential thermal analysis-thermogravimetry (DTA-TG), and Fourier transform infrared (FTIR). After 8 h grinding, the hydrated alumina was completely changed to an amorphous phase which showed a new exothermic DTA peak at about 980 °C due to the formation of γ–Al2O3 or spinel phase. This behavior was related to changes in the Al and Si environments, as deduced from the MAS NMR spectra. With increased grinding time, some 4-coordinated Al appears, together with an Al resonance at about 30 ppm. Simultaneously, a new Si resonance appears at about −90 ppm, indicating a greater degree of homogeneity in the ground samples. Mullite crystallizes at 1200 °C from samples ground for 8–20 h, its XRD intensity increasing with increased milling times, in agreement with the NMR, DTA, and FTIR data. Changes in the Al and Si environments during heat treatment, as reflected by the NMR spectra, are also reported.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 8 , August 1998 , pp. 2184 - 2189
Copyright
Copyright © Materials Research Society 1998

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

REFERENCES

1.Wahl, F. M., Grim, R. E., and Graf, R. B., Am. Mineral. 46, 1064 (1961).Google Scholar
2.Budnikov, P. P., Keshishyan, T. N., and Volkova, A. V., Zhurnal Prikladnoi Khimii 35, 1171 (1962).Google Scholar
3.Okada, K., Otsuka, N., and Sōmiya, S., Am. Ceram. Soc. Bull. 70, 1633 (1991).Google Scholar
4.Senna, M., Solid State Ionics 63–65, 3 (1993).CrossRefGoogle Scholar
5.Avvakumov, E. G., Devyatkina, E. T., and Kosova, N. V., J. Solid State Chem. 113, 379 (1994).CrossRefGoogle Scholar
6.Arai, Y., Yasue, T., and Yamaguchi, I., Nippon Kagaku Kaishi [8], 1395 (1972).CrossRefGoogle Scholar
7.Tsuchida, T. and Ishikawa, N., Reactivity of Solids 7, 207 (1989).CrossRefGoogle Scholar
8.Arai, Y., Yasue, T., Yamaguchi, I., and Sugino, T., Nippon Kagaku Kaishai [1], 49 (1974).CrossRefGoogle Scholar
9.Liao, J. and Senna, M., Solid State Ionics 66, 313 (1993).CrossRefGoogle Scholar
10.Okada, K. and Otsuka, N., J. Am. Ceram. Soc. 69, 652 (1986).CrossRefGoogle Scholar
11.Engelhardt, G. and Mitchel, D., High-Resolution Solid-State NMR of Silicate and Zeolites (Wiley, New York, 1987), pp. 143–157.Google Scholar
12.Meinhold, R. H., Slade, R. C. T., and Davies, T. W., Appl. Magn. Reson. 4, 141 (1993).CrossRefGoogle Scholar
13.Schmucker, M. and Schneider, H., Ber. Bunsenges. Phys. Chem. 100, 1550 (1996).CrossRefGoogle Scholar