Effect of Doping with Nb_2O_5 on the Magnetic and Structural Properties of Mn-Zn Ferrite

摘要

The present paper reports the magnetic and structural properties of manganese -zinc ferrites obtained by the addition of small amount of Nb2O5 (0.03-0. l%g). For power applications of Mn-Zn ferrite it is necessary to have the Seoundary Maximum of Permeability (SMP) and correspondingly low losses, in the domain of positive temperature, 50-100°C. The magnetic properties: initial permeability, power losses, temperature factor of permeability and Tc improve by the addition of 0.03-0.07%g Nb Oj to the Mn-Zn ferrite.Magnetjc and structural results: XRD, SEM^jiDX analysis, suggest that Nb ions partially dissolve in the ferrite lattice, substituting Fe octahedral and loosely bounding Fe ions.