Analysis of Structural and Microstructure of Lanthanum Ferrite by Modifying Iron Sand for Microwave Absorber Material Application

Abstract:

Analysis crystal structure of lanthanum ferrite by modifying iron sand has been carried out. Lanthanum ferrite included one of the functional materials which had composition of ABO₃ perovskite system. The lanthanum ferrite is prepared by iron sand and lanthanum oxide powders. The mixture was milled for 10h with the various composition of lanthanum content. The samples are sintered at a temperature of 1000 °C for 10h. The microstructure analyses showed that the particle shapes was polygonal with the varied particle sizes and uniform distribution on the surface of the sample. The phase composition of refinement result showed that the lanthanum ferrite formed empirical compound of La_0.8Mg_0.2Fe_0.7Ti_0.2Si_0.1O₃. The La_0.8Mg_0.2Fe_0.7Ti_0.2Si_0.1O₃ phase has a structure orthorombic (P b n m) with lattice parameters a = 5.513(1) Å, b = 5.549(1) Å and c = 7.849(2) Å, α = β = γ = 90°, the unit cell volume of V = 240.2(9) ų, and the atomic density of ρ = 6.293 gr/cm³. We concluded that this study has been successfully synthesized lanthanum ferrite material from modifying iron sand and has been understood changes in the parameters of the crystal structure and phase composition of this material. It was a great opportunity that the material can be used as a material candidate of absorber electromagnetic waves.

• Periodical: Advanced Materials Research (Volume 896)
• Pages: 423-427
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.896.423
• Online since: February 2014
• Authors: Nurul Taufiqu Rochman*, Ari Adi Wisnu
• Keywords: Absorber, Crystal Structure, Iron Sand, Lanthanum Ferrite, Microstructure, Microwave

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