Microwave Absorption Characteristic of ZnNd_(x)Fe_(2-x)O₄ System

Abstract:

The ZnNd_(x)Fe_(2-x)O₄ (x = 0.0; 0.010; 0.020 and 0,030) systems were synthesized by solid reaction method from a mixture of ZnO₂, Fe₂O₃ and Nd₂O₃ powders according to their mole ratio using mechanical milling techniques. In this mixture was added ethanol of 25 ml and then milled for 5 hours, after that sintered at a temperature of 1000 °C for 5 hours. X-ray diffraction patterns showed that the Nd³⁺ ion substitution in ZnFe₂O₄ with the concentration of x = 0.0 to 0.02 did not result in changes in ZnFe₂O₄ phase with cubic structure (space group of Fd-3m). However, the composition of x = 0.030 formed multiphases ZnFe₂O₄ and NdFeO₃ phases. The morphological observation using Scanning Electron Microscope (SEM) showed spherical and uniform particles. Whereas the microwave absorption capability of the sample ZnNd_(x)Fe_(2-x)O₄ system increased with the increasing concentration of x from 91.20% up to 97.80% with the highest absorption is found at a frequency of 10.24 GHz. The dielectric loss of this study is very small around 0.005 up to 0.05. It is hoped that the compound ZnNd_0.02Fe_1,98O₄ can be applied to microwave absorbing agents at high frequencies (X-band range) in antiradar detection systems.

• Periodical: Key Engineering Materials (Volume 855)
• Pages: 280-285
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.855.280
• Online since: July 2020
• Authors: Mashadi Mashadi*, Andhika Ajiesastra, Yunasfi Yunasfi
• Keywords: Cubic Structure, Magnetic Properties, Microwave Absorption, Neodymium, Zinc Ferrite

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