TITLE:
Impedance Spectroscopy of Concentrated Zirconia Nanopowder Dispersed Systems Experimental Technique
AUTHORS:
O. S. Doroshkevych, A. V. Shylo, O. V. Saprukina, I. A. Danilenko, T. E. Konstantinova, L. A. Ahkozov
KEYWORDS:
Impedance Spectroscopy; Nanopowder Dispersed Systems; Zirconia Dioxide; Low-Energy Action
JOURNAL NAME:
World Journal of Condensed Matter Physics,
Vol.2 No.1,
February
28,
2012
ABSTRACT: We propose an experimental spectroscopy method for investigating the electrical characteristics of concentrated nanopowder dispersed systems based on compacted ZrO2. The technique is based on measurement of electrochemical impedance of the compacts. A possibility is shown for using the technique to study the processes of structure formation in nanopowder dispersed systems. It is shown that the technique is quite sensitive to detect subtle effects due to the chemical composition of the reactants from which the dispersed phase has been synthesized and external electromagnetic fields. In particular, it has been determined that the powders produced by chemical deposition possess conductiv-ity by nanoparticle volume which is several order of magnitude lower than that for powders obtained from the chloride feedstock. It has been revealed that exposure to weak (H = 105 A/m - 106 A/m) pulsed magnetic fields leads to a redistribution of free charge carriers between volume and surface of the nanoparticles.