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Studies on structural and electrical properties of Mg0. 5+y (Zr2-yFey) 2 (PO4) 3 ceramic electrolytes

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Abstract

The sample of Mg0. 5+y (Zr1-y Fey) 2 (PO4) 3 (0.0 ≤y ≤0.5) was synthesized using the sol-gel method. The structures of the samples were investigated using X-ray diffraction and Fourier transform infrared spectroscopy measurement. XRD studies showed that samples had a monoclinic structure which was iso-structured with the parent compound, Mg0.5Zr (PO4) 3. The complex impedance spectroscopy was carried out in the frequency range 1–6 MHz and temperature range 303 to 773 K to study the electrical properties of the electrolytes. The substitutions of Fe3+ with Zr4+ in the Mg0.5Zr (PO4) 3 structure was introduced as an extrainterstitial Mg2+ ion in the modified structured. The compound of Mg0.5+y (Zr1-y Fey)2(PO4)3 with y = 0.4 gives a maximum conductivity value of 1.25 × 10−5 S cm−1 at room temperature and 7.18 × 10−5 S cm−1 at 773 K. Charge carrier concentration, mobile ion concentration, and ion hopping rate are calculated by fitting the conductance spectra to power law variation, σ ac (ω) = σ o   + Aω α. The charge carrier concentration and mobile ion concentration increases with increase of Fe3+ inclusion. This implies the increase in conductivity of the compounds was due to extra interstitial Mg2+ ions.

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Acknowledgments

Financial support from the University of Malaya (research grant RP013C-13AFR and BK049-2014) is gratefully acknowledged

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Authors and Affiliations

  1. Centre of Foundation Studies in Science, University of Malaya, 50603, Kuala Lumpur, Malaysia

    S. B. R. S. Adnan, M. H Jaafar & N. S Mohamed

  2. Institute of Graduate Studies, University of Malaya, 50603, Kuala Lumpur, Malaysia

    N. K Anuar

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  1. N. K Anuar
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  2. S. B. R. S. Adnan
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  3. M. H Jaafar
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  4. N. S Mohamed
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Correspondence to S. B. R. S. Adnan.

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Anuar, N.K., Adnan, S.B.R.S., Jaafar, M.H. et al. Studies on structural and electrical properties of Mg0. 5+y (Zr2-yFey) 2 (PO4) 3 ceramic electrolytes. Ionics 22, 1125–1133 (2016). https://doi.org/10.1007/s11581-015-1623-8

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  • DOI: https://doi.org/10.1007/s11581-015-1623-8

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