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Thermomagnetic study of surface cobalt modified iron oxide particles derived from oxalic precursors

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5 Author(s)
Gougeon, M. ; Univ. Paul Sabatier, Toulouse, France ; Leroy, E. ; Tailhades, Ph. ; Mollard, P.
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The cobalt modification of pure γ-Fe2O3 acicular particles by the so-called epitaxial process has been applied to γ-Fe2O3 particles, derived from oxalic precursors. Six elaboration parameters have been taken into account for the slurry heat treatment: cable content, pH, time, temperature, gas flowing into the solution, and surface activation. A thermomagnetic study including in situ annealing treatments and magnetic measurements at various temperatures in the range 20-380°C has been carried out. The results are compared with those of commercial surface-cobalt-modified pigments

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Magnetics, IEEE Transactions on  (Volume:26 ,  Issue: 1 )