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The formation of a–Fe2O3 monodispersed particles in solution

Published online by Cambridge University Press:  31 January 2011

M.P. Morales ,
T. González-Carreño  and
C.J. Serna
M.P. Morales
Affiliation:
Instituto de Ciencia de Materiales, C.S.I.C., Serrano, 115 dpdo. 28006 Madrid, Spain
T. González-Carreño
Affiliation:
Instituto de Ciencia de Materiales, C.S.I.C., Serrano, 115 dpdo. 28006 Madrid, Spain
C.J. Serna
Affiliation:
Instituto de Ciencia de Materiales, C.S.I.C., Serrano, 115 dpdo. 28006 Madrid, Spain
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Abstract

Uniform α–Fe2O3 particles of varying axial ratios have been prepared from hydrolyzed ferric chloride solutions at 100 °C. In the absence of phosphate anions, spherical particles were obtained by a mechanism that follows the classical LaMer and Dinegar scheme. However, in the presence of phosphates ellipsoidal particles were observed, with their formation taking place through an aggregation process from smaller primary particles of α–Fe2O3. It is also shown that all particles are monocrystalline irrespective of their formation mechanism.

Type
Articles
Information
Journal of Materials Research , Volume 7 , Issue 9 , September 1992 , pp. 2538 - 2545
Copyright
Copyright © Materials Research Society 1992

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