Structural and electrical properties of Sn substituted double sintering derived Ni-Zn ferrite

TL;DR

This study investigates how tin substitution affects the structural and electrical properties of Ni-Zn ferrites, revealing increased grain size, decreased resistivity, and enhanced dielectric constants suitable for miniaturized memory applications.

Contribution

It provides new insights into the effects of Sn substitution on Ni-Zn ferrites' properties using double sintering of nano powders, highlighting potential for energy storage devices.

Findings

Sn substitution leads to increased grain size.

Resistivity decreases with more Sn content.

Dielectric constant increases with Sn substitution.

Abstract

The Sn substituted Ni-Zn ferrites were synthesized by the standard double sintering technique using nano powders of nickel oxide (NiO), zinc oxide (ZnO), iron oxide (Fe2O3) and tin oxide (SnO2). The structural and electrical properties have been investigated by the X-ray diffraction, scanning electron microscopy, DC resistivity and dielectric measurements. Extra intermediate phase has been detected along with the inverse cubic spinel phase of Ni-Zn ferrite. Enhancement of grain size is observed in Sn substituted Ni-Zn ferrites. DC resistivity as a function of temperature has been investigated by two probe method. The DC resistivity was found to decrease whereas the dielectric constants increase with increasing Sn content in Ni-Zn ferrites. The dielectric constant of the as prepared samples is high enough to use these materials in miniaturized memory devices based capacitive components or energy storage principles.