Volume 5, Issue 4, December 2019, Page: 48-55
Investigation of Thermal, Structural and Electrical Properties of LaMnO3-Sigma
Kassahun Lewetegn Damena, Physics, Arba Minch University, ArbaMinch, Ethiopia
Received: Oct. 24, 2019;       Accepted: Nov. 18, 2019;       Published: Nov. 26, 2019
DOI: 10.11648/j.ajn.20190504.14      View  16      Downloads  4
Abstract
LaMnO3 is one of the most intensively studied cathode materials for solid oxide fuel cell (SOFC). In the present study, LaMnO3-d, cathode materials were synthesized by combustion method. The properties of synthesized materials like thermal, structural, electrical and electrochemical were investigated. Thermogravimetric analysis (TGA/DTA) analysis confirms that the calcination temperature (1000°C) is the appropriate temperature for the preparation of the materials using La (NO3)3.6H2O, MnSO4.H2O, Co (NO3)2.6H2O, Fe (NO3) 3.9H2O and C6H8O7.H2O precursors. The X-ray powder diffraction (XRD) results of the materials reveal the formation of the hexagonal structure with R3C space group Fd3m.The scanning electron microscope (SEM) characterization shows that the prepared samples have slightly porous structure with agglomerated particles. The energy dispersive spectroscopy (EDS) analysis is also confirms the presence of La, Mn and O elements in all synthesized materials. From the fourier transform infrared spectroscopy (FTIR) analysis, the most significant absorption bands located at 1629.8cm1 and 589.9cm1 wave numbers are identified. The room temperature conductivity of the sample is found to be 6.3×10-3 for LaMnO3 cathode material. From the dielectric constant ε′ as a function of frequency observed that value of ε′ maximum at lower frequencies and it begins to drop and becomes constant at higher frequencies.
Keywords
Perovskites, SOFC, Cathode Materials
To cite this article
Kassahun Lewetegn Damena, Investigation of Thermal, Structural and Electrical Properties of LaMnO3-Sigma, American Journal of Nanosciences. Vol. 5, No. 4, 2019, pp. 48-55. doi: 10.11648/j.ajn.20190504.14
Copyright
Copyright © 2019 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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