ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 39, (2) 52 - 57 (1995)

Kalužný Ján 1, Kozík Tomáš 1, Mariani Emil 1, Trnovcová Viera 2
1 Department of Physics, Faculty of Technology and Material Science, Slovak Technical University, Pavlínska 16, 917 24 Trnava, Slovak Republic
2 Institute of Physics, Slovak Academy of Science, Dúbravská cesta 9, 842 28 Bratislava, Slovak Republic

Dispersion of temperature dependencies of direct electrical conductivity values of samples prepared from ultrafine powders of zirconia ceramics (ZrO₂ : 11 mol.% CaO) was found as a function of powders time storage. The significance of the powders homogeneity reached by the additional grinding before the samples preparation for obtaining of reproducible values of direct electrical conductivity is presented. There is shown that temperature dependencies of absolute values of direct electrical conductivity are depended on the phase composition of the ceramic sample. There was found on the base of measurements the heating temperature 1400°C as a sufficient for searched powders.

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