The Effect of x Mole Ratio on Crystal Structure and Characteristic of Microwave Absorption of ZnLa_xFe_(2-x)O₄ System

Abstract:

The effect of x mole ratio on crystal structure and characteristic of microwave absorption of ZnLa_xFe_(2-x)O₄ system (x = 0.0; 0.01and 0.02) synthesized by solid state reaction method has been studied. The series of ZnLa_xFe_(2-x)O₄ samples were prepared using ZnO (99.99%) and Fe₂O₃ (99.99 %) powders (Merck product), while La₂O₃ (local production) powders in mole ratio. The identification result of the XRD shows that all of samples are single phase in this stage, it has cubic spinel structure with space group F d-3 m. The SEM image of ZnLa_xFe_(2-x)O₄ samples appear that the increase of mole ratio, the particle size of the compound powder rapidly becomes bigger, homogeneous and not uniform powder with spherical in shape and particle size of 200-500 nm. The results of the VNA characterization shows that the increasing of mole ratio (x = 0.0; 0.01 and 0.02) will enhance the ability to absorb microwave from 90.35% upto 97.69%. Thus. the composition of x=0.02 (ZnLa_0.02Fe_1.98O₄) possess to be the best composition for microwave absorbing material.

• Periodical: Key Engineering Materials (Volume 855)
• Pages: 46-51
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.855.46
• Online since: July 2020
• Authors: Yunasfi Yunasfi*, Ari Adi Wisnu, Mashadi Mashadi, Deswita Deswita, Yana Taryana
• Keywords: Microwave Absorption, Solid State Reaction, Spinel Structure, ZnLaxFe_(2-x)O₄ System

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