Structure analysis of electromagnetic waves absorbing material a lanthanum manganite system of (La0.8Ba0.2)(Mn(1-x)/2ZnxFe(1-x)/2)O3

Abstract

Solid compound of lanthanum manganite system of (La0.8Ba0.2)(Mn(1-x)/2ZnxFe(1-x)/2)O3 has been synthesized via conventional solid state reaction route using lanthanum oxide (La2O3), barium carbonate (BaCO3), zinc oxide (ZnO), ferric oxide (Fe2O3) and manganese carbonate (MnCO3) powders as it raw materials. High energy ball milling was used to mix the material for 5 hours. It is then sintered at 1000°C for 5 hours. X-ray powder diffraction method (XRD) and scanning electron microscopy (SEM) was used to analyze the change of structure of the solid compound. The refinement pattern result of the XRD shown that a single phase was occurred in the form of (La0.8Ba0.2)(Mn0.4Zn0.2Fe0.4)O3. It has trigonal lattice crystal structure of (r-3c) point group with lattice parameter of a = b = 5.515 Å and c = 13.551 Å, α = β = 90° and γ = 120°, a volume unit cell of V = 356.904 Å3 and a density of ρ = 6.745 g.cm−3. The SEM result shown that the surface morphology of (La0.8Ba0.2)(Mn0.4Zn0.2Fe0.4)O3 has a homogeneous sphere structure. The XRD and SEM structure analysis result of the lanthanum manganite system of (La0.8Ba0.2)(Mn0.4Zn0.2Fe0.4)O3 shown that the compound is feasible for further studied.