Synthesis and Characterization of Nickel Manganite Ceramics by Polymeric Precursors Method

Abstract:

This work presents the synthesis and characterization of NTC ceramic (Negative coefficient Temperature) based on nickel manganite (NiMn₂O₄) produced by the polymeric precursor method. NiMn₂O₄ were sintered at 900-1200 °C during 3h to produce the ceramics samples. The effect of sintering temperature on microstructure and electric properties of the NiMn₂O₄ ceramics was studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and temperature dependent resistance R(T) measurements. The XRD measurement indicated formation of cubic spinel-type structure of NiMn₂O₄. The crystallite size (as confirmed by XRD) and the particle size (as confirmed by SEM) increased as the sintering temperature increased from around 18nm (900 °C) to 100nm (1200 °C). All samples showed NTC behavior and, among the studied ceramics, that one sintered at 1200 °C showed lower resistivity value (~10³Ω.cm) at room temperature.

• Periodical: Materials Science Forum (Volume 881)
• Pages: 123-127
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.881.123
• Online since: November 2016
• Authors: A.C.B. de Oliveira, D.M.S. Ribeiro, C.G.P. Moraes, R.S. Silva, Nilson Santos Ferreira, Marcelo S. Silva
• Keywords: Crystal Structure, Nickel Manganite, NTC, Polymeric Precursor Method

References

[1] A. Veres, J.G. Noudem, O. Perez, S. Fourrez, G. Bailleul: Solid State Ionics Vol. 178 (2007), p.423.

DOI: 10.1016/j.ssi.2007.01.028

[2] M.H. Habibia, A.H. Habibia, M. Zendehdela, M. Habibib: Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy Vol. 110 (2013), p.226.

[3] J.E. Kang, J. Ryu , G. Han, J.J. Choi, W.H. Yoon, B.D. Hahn, J.W. Kim, C.W. Ahn, J.H. Choi, D.S. Park: Journal of Alloys and Compounds Vol. 534 (2012), p.70.

[4] J.R. Huang, H. Hsu, C. Cheng; Strongly reduced band gap in NiMn2O4 due to cation exchange. Journal of Magnetism and Magnetic Materials Vols. 358-359 (2014), p.149.

DOI: 10.1016/j.jmmm.2014.01.048

[5] R. Schmidt, A. Basu, A.W. Brinkman: Journal of the European Ceramic Society Vol. 24 (6) (2004), p.1233.

[6] J. Wang, J. Zhang: Materials Science and Engineering B Vol. 176 (7) (2011), p.616.

[7] C. Sánchez, J. Doria, C. Paucar, M. Hernandez, A. Mósquera, J.E. Rodríguez, A. Gómez, E. Baca, O. Morán: Physica Condensed Matter B Vol. 405 (17) (2010), p.3679.

DOI: 10.1016/j.physb.2010.05.065

[8] P.M. Pimentel, A.E. Martinelli, D.M.A. Melo, A.M.G. Pedrosa, J.D. Cunha, C.N. Silva Júnior: Materials Research Vol. 8 (2) (2005), p.221.

[9] M.S. Silva, N.S. Ferreira: Advanced Materials Research Vol. 975 (2014), p.36.

[10] B.D. Cullity S.R. Stock: Elements of X-Ray Diffraction. (Prentice-Hall 3rd ed. New Jersey, 2001).

[11] J.C.A. Menezes, N.S. Ferreira, L.G. Abraçado, M.A. Macêdo: J. Nanosci. Nanotechno Vol. 14 (2014), p.5903.