UTILIZATION DC METHOD DURING ZIRCONIA CERAMICS PROCESSING

Dispersion of temperature dependencies of direct electrical conductivi ty values of samples prepared from ultrafine powders of zirconia ceram ics (ZrO2: 11 mol % CaO) was found as a function of powders time stora ge. The significance of the powders homogeneity reached by the additio nal grinding before the samples preparation for obtaining of reproduci ble values of direct electrical conductivity is presented. There is sh own that temperature dependencies of absolute values of direct electri cal conductivity are depended on the phase composition of the ceramic sample. There was found on the base of measurements the heating temper ature 1400 degrees C as a sufficient for searched powders.