Hostname: page-component-7479d7b7d-wxhwt Total loading time: 0 Render date: 2024-07-11T06:28:24.680Z Has data issue: false hasContentIssue false
  • English
  • Français

An α–Fe2O3 powder of nanosized particles via precursor dispersion

Published online by Cambridge University Press:  31 January 2011

Xiangyuan Liu ,
Jun Ding  and
John Wang
Xiangyuan Liu
Affiliation:
Department of Materials Science, Faculty of Science, National University of Singapore, Singapore, 119260
Jun Ding
Affiliation:
Department of Materials Science, Faculty of Science, National University of Singapore, Singapore, 119260
John Wang*
Affiliation:
Department of Materials Science, Faculty of Science, National University of Singapore, Singapore, 119260
*
a) Address all correspondence to this author.maswangj@nus.edu.sg
Get access

Abstract

An α–Fe2O3 powder of nanosized particles has been successfully prepared by effectively dispersing the precipitated hydroxide precursor in a sodium chloride matrix. In particular, the hydroxide precursor was converted into crystalline α–Fe2O3 particles approximately 10 nm in size when it was mechanically activated in the sodium chloride matrix for 1 h. The subsequent calcination at 600 °C for 1 h resulted in a limited degree of coarsening in particle size while the crystallinity of α–Fe2O3 was further established. The effectiveness of obtaining ultrafine a–Fe2O3 powders by mechanical activation in the sodium chloride matrix was demonstrated by comparing the powder with those obtained via other routes, such as mechanical activation without sodium chloride as the matrix, calcination at 600 °C, and then mechanical activation in sodium chloride matrix, respectively. None of these processing routes led to a powder comparable in particle characteristics to that derived by the precursor dispersion.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 8 , August 1999 , pp. 3355 - 3362
Copyright
Copyright © Materials Research Society 1999

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.Cornell, R.M. and Schwertmann, U., The Iron Oxides (VCH Verlagsgesellschaft, Weinheim, Germany; VCH Publishers, New York, 1996), pp. 463.Google Scholar
2.Jiang, J.Z., Lin, R., Lin, W., Nielsen, K., Morup, S., Dam-Johansen, K., and Clasen, R., J. Phys. D: Appl. Phys. 30, 1459 (1997).Google Scholar
3.Liu, X.Q., Tao, S.W., and Shen, Y.S., Sens. Actuators, B 40, 161 (1997).Google Scholar
4.Sun, H.T., Cantalini, C., Faccio, M., and Peline, M., J. Am. Ceram. Soc. 79(4), 927–937 (1996).Google Scholar
5.Matijevic, E. and Scheiner, P., J. Colloid Interface Sci. 63, 509 (1978).Google Scholar
6.Ozaki, M., Kratohvil, S., and Matijevic, E., J. Colloid Interface Sci. 102, 146 (1984).CrossRefGoogle Scholar
7.Cornell, R.M. and Schwertmann, U., The Iron Oxides (VCH Verlagsgesellschaft, Weinheim, Germany; VCH Publishers, New York, 1996), pp. 483.Google Scholar
8.Sahu, K.K., Rath, C., Mishra, N.C., Anadn, S., and Das, R.P., J. Colloid Interface Sci. 185, 402 (1997).Google Scholar
9.Liu, Y., Zhu, W., Tan, O.K., and Shen, Y., Mater. Sci. Eng. B47, 171 (1997).CrossRefGoogle Scholar
10.Sugimoto, T. and Sakada, K., J. Colloid Interface Sci. 152, 587 (1992).Google Scholar
11.Sugimoto, T., Khan, M.M., and Muramatsu, A., Colloids Surf. 70, 167 (1993).Google Scholar
12.Nakatani, Y. and Matsuoka, M., Jpn. J. Appl. Phys. 21, L758 (1982).Google Scholar
13.Roos, W., J. Am. Ceram. Soc. 63(11–12), 601 (1980).Google Scholar
14.Benjamine, J.S., Sci. Am. 234, 40 (1976).Google Scholar
15.Ding, J., Miao, W.F., McCormick, P.G., and Street, R., Appl. Phys. Lett. 67, 3804 (1995).Google Scholar
16.Cocco, G., Mulas, G., and Schiffini, L., Mater. Trans., JIM 36(2), 150 (1995).Google Scholar
17.Ding, J., Miao, W.F., Tsuzuki, T., McCormick, P.G., Street, R., J. Magn. Magn. Mater. 162, 271 (1996).CrossRefGoogle Scholar
18.Kaczmarek, W.A. and Ninham, B.W., IEEE Trans. Mag. 30(2), 732 (1994).Google Scholar
19.Matteazzi, P. and Caer, G.L., Mater. Sci. Eng. A149, 135 (1991).Google Scholar
20.Kaczmarek, W.A. and Ninham, B.W., J. Phys. IV 7, C1–47 (1997).Google Scholar
21. Powder Diffraction File, Card No. 33–0664, International Center for Diffraction Data, Swarthmore, PA (1996).Google Scholar
22.Pugh, R.J. and Bergstrom, L., Surface and Colloid Chemistry in Advanced Ceramics Processing (Marcal Dekker Inc., New York, 1994), pp. 29.Google Scholar