Iron(II) cobalt ferrites. Preparation and interfacial behaviour
- 1 January 1987
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 83 (4) , 1159-1168
- https://doi.org/10.1039/f19878301159
Abstract
Relations between the interfacial and the chemical-structural features of oxides are of concern in several fields. Ferrites appear as a particularly suitable system as they allow gradual changes in composition while avoiding complications from structural modifications. A family of iron(II) cobalt ferrites (CoxFe3–xO4, 0.25 < x < 1) was prepared by a wet procedure and characterized for phase purity and cationic Co/Fe composition. Auger surface analyses showed that the Co/Fe ratio does not undergo significant modifications in passing from the bulk to the surface. Parameters of the electrical double layer (pHp.z.e. and isoelectric point) have been determined for all the oxide compositions. Results show that the pHp.z.e. and isoelectric point values vary as a continuous function of the degree of substitution of Co for Fe.Keywords
This publication has 0 references indexed in Scilit: