Synthesis and Sintering of LaCo1-XFexO3 Ceramics: Microstructure Analysis

Gustavo R. Paula; Daniel Véras Ribeiro; Márcio Raymundo Morelli

doi:10.4028/www.scientific.net/MSF.869.69

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HomeMaterials Science ForumMaterials Science Forum Vol. 869Synthesis and Sintering of LaCo1-XFexO3 Ceramics:...

Synthesis and Sintering of LaCo_1-XFe_xO₃ Ceramics: Microstructure Analysis

Abstract:

This work intends to show the effect of the iron ion doping in LaCoO₃ perovskite, both in powders and in sintered samples obtained from combustion reaction route. The phase formation and particle morphology and particle size distribution of the powders were analysed by XRD, SEM and sedimentation techniques, respectively. Relative density, microstructure (secondary phases and grain size) and pore size distribution of LaCo_1-xFe_xO₃ sintered ceramics have been investigated by SEM/EDS and Hg porosimetry analysis. Although LaCo_1-xFe_xO₃ powders obtained from combustion reaction exhibited smaller grain sizes when sintered at high temperatures, they showed higher volume fraction of secondary phases. The presence of these crystalline phases in addition to the desired perovskite affected the microstructure acting as grain growth inhibitors by grain boundary pinning. It is believed by observing three grain junction pores that LaFeO₃ phase has a smaller dihedral angle than LaCoO₃. This fact would explain why LaFeO₃ presented a smaller driving force for sintering with higher tendency of pore and inclusion coarsening at higher temperatures (1400°C).

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Materials Science Forum (Volume 869)

Pages:

69-73

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.869.69

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Online since:

August 2016

Authors:

Gustavo R. Paula, Daniel Véras Ribeiro, Márcio Raymundo Morelli

Keywords:

Combustion Reaction, Grain Growth, LaCo_1-xFe_xO₃, Sintering

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References

[1] Y. Zeng, Y.S. Lin and S. L Swartz: Journal of Membrane Science Vol. 150 (1998), p.87.

Google Scholar

[2] T. Nobunaga, K. Okamoto, N. Miura, N. Yamazoe and Y. Teraoka: Solid State Ionics. Vol. 48 (1991), p.207.

DOI: 10.1016/0167-2738(91)90034-9

Google Scholar

[3] J.A. Lane, S.J. Benson, D. Waller, J.A. Kilner: Solid State Ionic Vol. 121 (1999), p.201.

Google Scholar

[4] K. Kleveland, M.A. Einarsrud and T. Grande: Journal of the European Ceramic Society Vol. 20 (2000), p.185.

Google Scholar

[5] Y. Wu, C. Cordier, E. Berrier, N. Nuns, C. Dujardin and P. Granger: Applied Catalysis B: Environmental Vols. 140–141 (2013), p.151.

DOI: 10.1016/j.apcatb.2013.04.002

Google Scholar

[6] S. Royer, A. Van Neste, R. Davidson, S. McIntyre and S. Kaliaguine: Industrial & Engineering Chemistry Research Vol 43 (2004), p.5670.

Google Scholar

[7] A. Khanfekr, K. Arzani, A. Nemati and M. Hosseini: International Journal of Enviornmental Science and Technology Vol. 6 (2006), p.105.

Google Scholar

[8] D.V. Karpinsky, I.O. Troyanchuk, K. Bärner, H. Szymczak and M. Tovar: Journal of Physics: Condensed Matter Vol. 17 (2005), p.7219.

Google Scholar

[9] A.M. Segadães, M.R. Morelli and R.H.G.A. Kiminami: Journal of the European Ceramic Society 18 (1998), p.771.

Google Scholar

[10] S.R.A. Jain: Combustion and Flame Vol. 40 (1981), p.71.

Google Scholar

[11] F. Morin, G. Trudel and Y. Denos: Solid State Ionics Vol. 96 (1997), p.129.

Google Scholar

[12] T.G. Van de Ven and R.J. Hunter: Rheologic Acta Vol. 16 (1977), p.534.

Google Scholar

[13] F.F. Lange: Journal of the American Ceramic Society Vol. 72 (1989), p.3.

Google Scholar

[14] N. Xu et al.: Journal of Membrane Science Vol. 166 (2000), p.13.

Google Scholar

[15] Y.M. Chiang, D. Birnie III and W.D. Kingery: Physical Ceramics – Principles for Ceramic Science and Engineering. (MIT Press, 1997).

Google Scholar