Microstructure and Phase Analysis of La0.8Ba0.2TixMn(1-x)O3 System for Microwave Absorber Material (x = 0 – 0.7)

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The synthesis and characterization of the magnetic materials of La0.8Ba0.2Mn (1-x)TixO3 system (x = 0 0.7) by mechanical alloying process have been performed. This magnetic material is prepared by oxides, namely La2O3, BaCO3, MnCO3 and TiO2. The mixture was milled for 10 h and then sintered at 1000 ° C for 10 h. The refinement results of x-ray diffraction pattern showed that the doping concentration (x < 0.5) was a single phase, which has a structure monoclinic (I12/a1) with lattice parameters a = 5.5169(5) Å, b = 5.5437(5) Å and c = 7.8553(7) Å, = 90o and 89.75(1) o, V = 240.25(4) Å3 and 6.345 gr.cm-3. The microstructure analysis showed that the particle shapes was polygonal with the varied particle sizes distributed homogeneously on the surface of the samples. We concluded that the maximum number of titanium atoms substituting manganese atom is around x ~ 0.43 without changing the structure of this system.

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Edited by:

Akhmad Herman Yuwono

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97-100

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W. A. Adi and A. Manaf, "Microstructure and Phase Analysis of La0.8Ba0.2TixMn(1-x)O3 System for Microwave Absorber Material (x = 0 – 0.7)", Advanced Materials Research, Vol. 789, pp. 97-100, 2013

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September 2013

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[1] B. Li, Y. Shen, Z. Yue, C. Nan, Enhanced Microwave Absorption in Nickel/Hexagonal Ferrite/Polymer Composite, J. Appl. Phys. Lett., Vol. 89, No. 132505, (2006).

DOI: https://doi.org/10.1063/1.2357565

[2] Z.W. Li, L. Guoqing, C. Linfeng, Y. Wu, C.K. Ong, Co2+ Ti4+ Substituted Z-type Barium Ferrite with Enhanced Imaginary Permeability and Resonance Frequency, J. of App. Phys., Vol 99, 063905, (2006).

DOI: https://doi.org/10.1063/1.2180431

[3] H. Zhang, X. Yao, M. Wu, L. Zhang, Complex Permittivity and Pearmibility of Zn-Co Substituted Z-type Hexaferrite Prepared by Citrate Sol-gel Process, British Cer. Transc., Vol. 102, (2003), pp.01-10.

DOI: https://doi.org/10.1179/096797803225009193

[4] Y.L. Cheng, J.M. Dai, D.J. Wu, Y.P. Sun, Electromagnetic and microwave absorption properties of carbonyliron/La0. 6Sr0. 4MnO3 composites, Journal of Magnetism and Magnetic Materials, Vol. 322, (2010), p.97–101.

DOI: https://doi.org/10.1016/j.jmmm.2009.08.037

[5] G. Li, G.G. Hub, H.D. Zhoua, X. -J. Fan, X.G. Li, Attractive microwave-absorbing properties of La1−xSrxMnO3 manganite powders, Materials Chemistry and Physics, 75, (2002), p.101–104.

DOI: https://doi.org/10.1016/s0254-0584(02)00039-1

[6] K.S. Zhou, H. Xia, K. -L. Huang, L. -W. Deng, D. Wang, Y. -P. Zhou, S. -H. Gao, The microwave absorption properties of La0. 8Sr0. 2Mn1-yFeyO3 nanocrystalline powders in the frequency range 2–18 GHz, Physica B, Vol. 404, (2009), p.175–179.

DOI: https://doi.org/10.1016/j.physb.2008.09.042

[7] N. Kallel, G. Dezanneau, J. Dhahri, M. Oumezzine, H. Vincent, Structure, magnetic and electrical behaviour of La0. 7Sr0. 3Mn1-xTixO3 with 0< x < 0. 3, Journal of Magnetism and Magnetic Materials, 261, (2003), p.56–65.

DOI: https://doi.org/10.1016/s0304-8853(02)01413-0

[8] B.H. Toby, EXPGUI, a graphical user interface for GSAS, Journal of Applied Crystallography, Desember (2000).

[9] F. Izumi, A Rietveld-Refinement Program RIETAN-94 for Angle-Dispersive X-Ray and Neutron Powder Diffraction, National Institute for Research in Inorganic Materials 1-1 Namiki, Tsukuba, Ibaraki 305, Japan, Revised on June 22, (1996).

[10] Maignan, C. Michel, M. Herviau, B. Raveau, A monoclinic manganite, La0. 9Mn O(3-$-delta), with colossal magnetoresistance properties near room temperature, Solid State Communications 101(4), (1997), pp.277-281.

DOI: https://doi.org/10.1016/s0038-1098(96)00533-9

[11] K. Scheunemann, H.K. Mueller-Buschbaum, Zur Kristallstruktur von La2Ti2O7, Journal of Inorganic and Nuclear Chemistry 37, (1975), pp.1879-1881.

DOI: https://doi.org/10.1016/0022-1902(75)80906-7

[12] R. W. G. Wyckoff, Published by The Chemical Catalog Company, INC, New York in 1931", The second edition of Structure of Crystals , (1931), pp.273-273.