Impedance Spectroscopy Analysis of Mg4Nb2O9 Ceramics with Different Additions of V2O5 for Microwave and Radio Frequency Applications
- 118 Downloads
The complex impedance spectroscopy study of magnesium niobate Mg4Nb2O9 (MN) ceramics with different additions of V2O5 (0%, 2%, 5%) was performed in this present paper. The preparation of MN samples were carried out by using the solid-state reaction method with a high-energy milling machine. Frequency and temperature dependence of the complex impedance, complex modulus analysis, and conductivity were measured and calculated at different temperatures by using a network impedance analyzer. A non-Debye type relaxation was observed showing a decentralization of the semicircles. Cole–Cole formalism was adopted here with the help of a computer program used to fit the experimental data. A typical universal dielectric response in the frequency-dependent conductivity at different temperatures was found. The frequency dependent ac conductivity at different temperatures indicates that the conduction process is thermally activated. The activation energy was obtained from the Arrhenius fitting by using conductivity and electrical modules data. The results would help to understand deeply the relaxation process in these types of materials.
KeywordsComplex impedance spectroscopy dielectric microwave materials Cole–Cole formalism
Unable to display preview. Download preview PDF.
The authors are grateful to CAPES, LOCEM Laboratory, x-ray Laboratory, and the US Air Force Office of Scientific Research (AFOSR) (FA9550-16-1-0127).
- 5.G.G. Yao, C.J. Pei, H. Ma, H.L. Zhang, and X.L. Tian, J. Ceram Process. Res. 13, 93 (2012).Google Scholar
- 8.H.T. Wu, Y.S. Jiang, W.B. Wu, F. Yang, and Y.L. Yue, J. Electroceram. (2012). doi: 10.1007/s10832-012-9705-8.
- 11.S. Sahoo, U. Dash, S.K.S. Parashar, and S.M. Ali, J. Adv. Ceram. (2013). doi: 10.1007/s40145-013-0075-8.
- 12.N.K. Singh and P. Kumar, Adv. Mater. Lett. (2011). doi: 10.5185/amlett.2011.1215.
- 13.Z.S. Macedoa, A.L. Martinezb, and A.C. Hernandes, Mater. Res. Ibero. Am. J. (2003). doi: 10.1590/S1516-143920030 00400026.
- 14.S.S. Danewalia, G. Sharma, S. Thakur, and K. Singh, Sci. Rep. (2016). doi: 10.1038/srep24617.
- 15.M. Slankamenac, T. Ivetic, M.V. Nikolic, N. Ivetic, M. Zivanov, and V.B. Pavlovic, J. Electron. Mater. (2010). doi: 10.1007/S11664-010-1118-3.
- 16.D.H. Wang, W.C. Goh, M. Ning, and C.K. Ong, Appl. Phys. Lett. 88, 496 (2011).Google Scholar
- 17.P.S. Das, P.K. Chakraborty, B. Behera, N.K. Mohanty, and R.N.P. Choudhary, J. Adv. Ceram. (2014). doi: 10.1007/s40145-014-0087-zCN10-1154/TQ.
- 19.J.C. Maxwell, Electricity and Magnetism, vol. 1 (Oxford, 1892), p. 197.Google Scholar
- 20.K.W. Wagner, Ann. Phys. 40, 818 (1993).Google Scholar
- 24.B. Ghosh, A. Dutta, and T.P. Sinha, J. Alloys Compd. (2013). doi: 10.1016/j.jallcom.2012.11.027.
- 26.M. Ram and S. Chakrabarti, J. Alloys Compd. (2008). doi: 10.1016/j.jallcom.2007.08.001.