Paper Title:
Conductivity of Grains and Grain Boundaries in Polycrystalline Heteropoly Acid Salts
  Abstract

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.

  Info
Periodical
Edited by
Dragan P. Uskokovic, Slobodan K. Milonjic, Djan I. Rakovic
Pages
101-106
DOI
10.4028/www.scientific.net/MSF.494.101
Citation
B. Škipina, T. Čajkovski, M. Davidović, D. Čajkovski, V. Likar-Smiljanić, U.B. Mioč, "Conductivity of Grains and Grain Boundaries in Polycrystalline Heteropoly Acid Salts", Materials Science Forum, Vol. 494, pp. 101-106, 2005
Online since
September 2005
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