Conductivity of Grains and Grain Boundaries in Polycrystalline Heteropoly Acid Salts

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In our previous work we investigated the conductivity and dielectric relaxation phenomena in heteropoly acids and their salts. In this work, we have studied the conductivity of grains and grain boundaries in compressed powders of 12-tungstophosphoric acid (WPA) salts with univalent and bivalent ions. The method of impedance spectroscopy has been employed in the frequency range from 5 Hz to 500 kHz. We obtained grains and grain boundaries conductivities as well as corresponding activation energies. Grain conductivity in all investigated salts is always higher than the grain boundary conductivity.

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Dragan P. Uskokovic, Slobodan K. Milonjic, Djan I. Rakovic

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101-106

Citation:

B. Škipina et al., "Conductivity of Grains and Grain Boundaries in Polycrystalline Heteropoly Acid Salts", Materials Science Forum, Vol. 494, pp. 101-106, 2005

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September 2005

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[1] R.D. Armstrong, T. Dickinson, P.M. Willis, Electroanalitical Chemistry and Interfacial Electrochemistry, 53 (1974), p.389.

[2] R.C.T. Slade, J. Barker, H.A. Pressman, J. Strange, Solid State Solid State Ionics, 28-30 (1988), p.594.

[3] J. Schoonman, Solid State Ionics, 157 (2003), p.319.

[4] S. Upadhyay, O. Parkash, D. Kumar, J. Phys. D: Appl. Phys., 37 (2004), p.1483.

[5] J. Jose, M. Abdul Khadar, Nanostructured Materials, 11(1999), p.1091.

[6] B. Kumar, C. Chen, C. Varanasi, J.P. Felluer, Journal of Power Sources, (2004), in press.

[7] S. Chatterjee, P.K. Mahapatra, R.N.P. Choudhary, A.K. Thakur, Phys. Stat, Sol. (a), 210 (2004), p.588.

[8] M.T. Pope, Heteropoly and Isopoly Oxometalates, Springer-Verlag, Berlin-Heidelberg, (1983).

[9] P. Kerserho, These de doctorat, Universite Piere et Marie Curie, Paris 1982, 4.

[10] U. Mioč, Ph. Colomban, A. Novak, J. Mol. Struct., 218 (1990), p.123.

[11] E. Ukshe, L.S. Leonova, A.I. Korosteleva, Solid State Ionics, 36 (1989), p.219.

[12] U.B. Mioč, M. Davidović, B.R. Stanisavljev, M.R. Todorović, Z.P. Nedić, S.M. Uskoković, J. Serb. Chem Soc., 61 (1996), p.759.

[13] Lj. Damjanović, V. Rakić, U.B. Mioč, A. Auroux Thermochimica Acta, accepted for publication.

[14] U.B. Mioč, M.R. Todorović, S.M. Uskoković-Marković, M. Davidović, A. Kremenović, Spasojević-de Bire, T. Čajkovski, V. Likar-Smiljanić, R. Biljić, Solid State Ionics, 162-163 (2003), p.217.

DOI: https://doi.org/10.1016/s0167-2738(97)00041-6

[15] E. Lilley, J.E. Strutt, Phys. Stat. Sol. (a), 54 (1979), p.639.

[16] J. Ross Mac Donald (Ed. ), Impedance Spectroscopy, John Wiley, New York, (1987).

[17] M. Davidović, T. Čajkovski, D. Čajkovski, V. Likar-Smiljanić, R. Biljić, U. Mioč, Z. Nedić, Solid State Ionics, 125 (1999), p.411.

DOI: https://doi.org/10.1016/s0167-2738(99)00203-9

[18] M. Davidović, T. Čajkovski, D. Čajkovski, V. Likar-Smiljanić, R Biljić, U. Mioč, Z. Nedić, Solid State Ionics, 147 (2002), p.123.

DOI: https://doi.org/10.1016/s0167-2738(97)00041-6

[19] T. Čajkovski, M. Davidović, D. Čajkovski, V. Likar-Smiljanić, R. Biljić, U. Mioč, Z. Nedić, Material Science Forume, Vol. 352 (2000), p.251.

DOI: https://doi.org/10.4028/www.scientific.net/msf.352.251

[20] B. Pecquenard, J.C. Badot, N. Baffier, N. Belhadj-Tahar, Phys. Stat. Sol. (a), 159 (1997), p.469.

[21] N.M. Beckmans, L. Heyne, Electrochim. Acta, 21 (1976), p.303.