Authors : D. S. Choudhary
Page Nos : 410-413
Description :
Abstract:
In the recent years, there has been an increased interest in the application of Zn substituted ferrites, in particular NiCuZn ferrites for the production of MLFCI components. Further, The applications of the ferrite chip inductors include combined inductor-capacitor (LC) filters, Electromagnetic Interference (EMI) filters, an AC choke for active devices, matching circuits, electromagnetic suppressor etc. apart from audio and visual equipment. Due to such potential applications, several studies have been conducted to enhance the properties of NiCuZn ferrite. Important approaches adopted are: a) the reduction of the particle size to improve densification, b) using sintering aids for better densification and c) substitutions at tetrahedral and octahedral crystallographic site in the spinel ferrite to improve electromagnetic properties. The work during last few years on Zn-spinel ferrites for the morphological, electromagnetic and dielectric and other properties has been reviewed. It is observed that the Permeability and resistivity are the most important parameters used in evaluating magnetic materials. The electromagnetic properties of NiCuZn ferrites are highly sensitive to the processing parameters especially sintering conditions and the amount of constituent metal oxides. Therefore, the investigation for various compositions in the Ni- Zn ferrite is carried out globally. In present article the work on NiZn ferrite in last recent years is reviewed and inferred that chemical composition and the substitutions-aid in ferrites must be used as attractive approaches to modify the potential properties.
Keywords- NiCuZn ferrite, nano-ferrite, dielectric loss factor, magnetization, conductivity.
