Vol 8, No 5 (2017) > Metalurgy and Material Engineering >

Absorption Characteristics of the Electromagnetic Wave and Magnetic Properties of the La0.8Ba0.2FexMn½(1-x)Ti½(1-x)O3 (x = 0.1–0.8) Perovskite System

Wisnu Ari Adi, Azwar Manaf, . Ridwan

 

Abstract: This paper reports on the magnetic properties and electromagnetic characterization of La0.8Ba0.2FexMn½(1-x)Ti½(1-x)O3 (x = 0.1–0.8). The La0.8Ba0.2FexMn½(1-x)Ti½(1-x)O3 (x = 0.1–0.8) materials were prepared using a mechanical alloying method. All the materials were made of analytical grade precursors of BaCO3, Fe2O3, MnCO3, TiO2, and La2O3, which were blended and mechanically milled in a planetary ball mill for 10h. The milled powders were compacted and subsequently sintered at 1000°C for 5h. All the sintered samples showed a fully crystalline structure, as confirmed using an X-ray diffractometer. It is shown that all samples consisted of LaMnO3 based as the major phase with the highest mass fraction up to 99% found in samples with x < 0.3. The mass fraction of main phase in doped samples decreased in samples with x > 0.3. The hysteresis loop derived from magnetic properties measurement confirmed the present of hard magnetic BaFe12O19 phase in all La0.8Ba0.2FexMn½(1-x)Ti½(1-x)O3 (x = 0.1–0.8) samples. The results of the electromagnetic wave absorption indicated that there were three absorption peaks of ~9 dB, ~8 dB, and ~23.5 dB, respectively, at respective frequencies of 9.9 GHz, 12.0 GHz, and 14.1 GHz. After calculations of reflection loss formula, the electromagnetic wave absorption was found to reach 95% at the highest peak frequency of 14.1 GHz with a sample thickness of around 1.5 mm. Thus, this study successfully synthesized a single phase of La0.8Ba0.2FexMn½(1-x)Ti½(1-x)O3 (x = 0.1–0.8) for the electromagnetic waves absorber material application.
Keywords: Absorber; Electromagnetic wave; Lanthanum manganite; Magnetic; Perovskite; Substitution; Structural

Full PDF Download

References


Adi, W.A., Manaf, A., 2012. Structural and Absorption Characteristics of Mn-Ti Substituted Ba-Sr Hexaferrite Synthesized by Mechanical Alloying Route. Journal of Basic and Applied Scientific Research, Volume 2(8), pp. 7826–7834

Cheng, Y.L., Dai, J.M., Wu, D.J., Sun, Y.P., 2010. Electromagnetic and Microwave Absorption Properties of Carbonyl Iron/La0.6Sr0.4MnO3Composites. Journal of Magnetism and Magnetic Materials, Volume 322, pp. 97–101

Duggal, S., Aul, G.D., 2014. Review on Effect of Electric Permittivity and Magnetic Permeability over Microwave Absorbing Materials at Low Frequencies. International Journal of Engineering and Advanced Technology, Volume 3(5), pp. 12–19

Eswaraiah, V., Sankaranarayanan, V., Ramaprabhu, S., 2011. Functionalized Graphene–PVDF Foam Composites for EMI Shielding. Macromolecular Materials and Engineering, Volume 296, pp. 1–5

Idris, M.S., Osman, R.A.M., 2013. Structure Refinement Strategy of Li-based Complex Oxides using GSAS-EXPGUI Software Package. Advanced Materials Research, Volume 795, pp. 479–482

Kiani, E., Rozatian, A.S.H., Yousefi, M.H., 2014. Structural, Magnetic and Microwave Absorption Properties of SrFe12–2x(Mn0.5Cd0.5Zr)xO19Ferrite. Journal of Magnetism and Magnetic Materials, Volume 361, pp. 25–29

Manaf, A., Adi, W.A, 2014. Structural Investigation and Microwave Characteristics of (Ba0.2La0.8)Fe0.2Mn0.4Ti0.4O3 Absorbing Materials. In: AIP Conference Proceedings 1589, pp. 249–252

Mohit, K., Vibha R.G., Sanjeeb, K.R., 2014. Microwave Dielectric Properties of Ni0.2CuxZn0.8-xFe2O4 for Application in Antenna. Progress in Electromagnetics Research B, Volume 57, pp. 157–175

Mondal, P., Bhattacharya, D., Choudhury, P., 2006. Dielectric Anomaly at the Orbital Order–disorder Transition in LaMnO3+δ. Journal of Physics: Condensed Matter, Volume 18(29), pp. 6869–6881

Sardjono, P., Adi, W.A., 2014. Thermal Analysis and Magnetic Properties of Lanthanum Barium Manganite Perovskite. Journal of Advanced Materials Research, Volume 896, pp. 381–384

Song, J., Wang, L., Xu, N., Zhang, Q., 2010. Microwave Absorbing Properties of Magnesium-substituted MnZn Ferrites Prepared by Citrate-EDTA Complexing Method. Journal of Materials Science & Technology, Volume 26(9), pp. 787–792

Sunny, V., Kurian, P., Mohanan, P., Joy, P.A., Anantharaman, M.R., 2010. A Flexible Microwave Absorber Based on Nickel Ferrite Nanocomposite. Journal of Alloys and Compounds, Volume 489, pp. 297–303

Wu, Z., Li, M., 2011. Electromagnetic Interference Shielding of Carbon Nanotube Macrofilms. Scripta Material, Volume 64, pp. 809–812

Zhang, S., Cao, Q., 2012. Electromagnetic and Microwave Absorption Performance of Some Transition Metal Doped La0.7Sr0.3Mn1−xTMxO3±ı (TM = Fe, Co or Ni). Materials Science and Engineering B, Volume 177, pp.678–684

Zhou, K.S., Xia, H., Huang, K.-L., Deng, L.-W., Wang, D., Zhou, Y.-P., Gao, S.-H., 2009. The Microwave Absorption Properties of La0.8Sr0.2Mn1-yFeyO3Nanocrystalline Powders in the Frequency Range 2–18 GHz. Physica B: Condensed Matter, Volume 404, pp. 175–179