Abstract
Microcrystalline particles of Fe2O3 having different sizes between 70 and 5nm have been synthesized using a novel three component microemulsion technique. A succession of crystal size induced structural transitions was observed. While -Fe2O3 was found to nucleate for a particle size above 30nm, γ - Fe2O3 was formed at a particle size of 5nm. These structural transformations have been related to the increase in the unit cell volume that occurs as the particle size is decreased. It is shown that the morphology of the particles can be controlled by changing the aqueous to organic phase ratio and the amount of surfactant.
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References
V. R. Palkar, “Fine Ceramic Oxide Particles by SOL-GEL Process and the Study of Their Properties”, Ph.D Thesis, submitted to the University of Bombay, Jan. 1980.
M. Boutonnet, J. Kizling, P. Stenius and G. Maire, Colloids Surfaces, 5, 209, (1982).
M. Gobe, K. Kon-no, K. Kandori and A. Kitahara, J. Colloid Interface Science, 93, 293, (1983).
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© 1989 Plenum Press, New York
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Palkar, V.R., Multani, M.S., Ayyub, P. (1989). Microparticles by Microemulsion. In: Mittal, K.L. (eds) Surfactants in Solution. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-7990-8_19
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DOI: https://doi.org/10.1007/978-1-4615-7990-8_19
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4615-7992-2
Online ISBN: 978-1-4615-7990-8
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