CETMIC   05378
CENTRO DE TECNOLOGIA DE RECURSOS MINERALES Y CERAMICA
Unidad Ejecutora - UE
artículos
Título:
Two alternative synthesis routes for MnZn ferrites using mechanochemical treatments
Autor/es:
BOTTA. P.G. BERCOFF, E.F. AGLIETTI H.R. BERTORELLO, J.M. PORTO LOPEZ
Revista:
CERAMICS INTERNATIONAL
Editorial:
Elsevier
Referencias:
Año: 2006 vol. 32 p. 857 - 863
ISSN:
0272-8842
Resumen:
Abstract
Two different methodologies to synthesise MnxZn1_xFe2O4 (x = 0.5, 0.65 and 0.85) are compared. In the first method, mechanochemically
activated mixtures of elemental oxides were thermally treated at 1100 and 1200 8C under N2 atmosphere. In the second, previously obtained
MnFe2O4 and ZnFe2O4 were well-mixed and treated at 1100 8C under N2 atmosphere. Both series of materials were characterised by X-ray
diffraction (XRD), vibrating sample magnetometry (VSM), scanning electron microscopy (SEM), electron probe microanalysis and density
measurements. Through a two-step processing, both methods allowed to obtain MnZn ferrites of several compositions, which exhibited high
saturation magnetisations and very low coercivities. In this way, in order to overcome some limitations of the conventional preparation
technique, alternative synthesis routes for these ferrites are proposed in this study.
# 2005 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Keywords: C. Magnetic properties; D. Ferrites; Spinels; Mechanochemistry
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