Authors
University of Alzahra, Tehran, Iran
Abstract
Because of rich electrical, magnetic, chemical and structural properties, spinel ferrites have been a matter of interest among researchers in recent years. Zinc ferrite with a wide range of applications and having the general formula of ZnFe2O4 is a resistant material with high resistivity that cannot conduct DC electrical currents. Substitution of different metallic ions (such as copper, nickel, cobalt and….) can easily modify ferrites’ properties, because these dopings cause a rearrangement of Fe+3 ions into two preexisting octahedral and tetrahedral sites. In this paper Zinc ferrite doped with 0, 10, 100 % Ag prepared using sol gel method in order to investigate whether Ag ions can substitute in ferrite’s structure and modify its electrical properties or not. X-ray diffraction patterns confirm the single spinel structure for the prepared samples, and show that silver does not enter ferrites’ structure. Also measuring Ac electrical conductivity and dielectric constant of both 10 % doped and pure Zn ferrite were done, and as the graphs related to both pure and 10 %doped zinc ferrites showed the same trend and equal values , the fact that Ag ions cannot enter ferrites’ structure was again proved.
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