J. Phys. IV France
Volume 08, Numéro PR2, June 1998
Soft Magnetic Materials 13
Page(s) Pr2-405 - Pr2-408
Soft Magnetic Materials 13

J. Phys. IV France 08 (1998) Pr2-405-Pr2-408

DOI: 10.1051/jp4:1998294

Magnesium-zinc ferrite with copper substitutions

E. Rezlescu, N. Rezlescu, P.D. Popa, M.L. Craus and L. Rezlescu

Institute of Technical Physics, Bd. D. Mangeron 47, 6600 lasi, Romania

The effects of Mg substitution by Cu on the properties of MgZn ferrites sintered at low temperature are investigated. The densification of MgCuZn ferrites is dependent upon Cu content in the composition Mg0.5-xCuxZn0.5Fe2O4 + 0,5 MgO. From the sintering experiments carried out between 800 and 1100° C it was established the optimum amount of CuO (x = 0.3) which is sufficient to promote sintering at low temperature (1050°C) and to yield a dense material (4,5 g/cm3). It was evidenced a break in the resistivity for x > 0,3 when it decreases by four orders of magnitude. The strong dependence of the material parameters on the Cu ions content is consistent with the microstructural changes induced by copper ions which favour the lattice diffusion process.

© EDP Sciences 1998