Structural features of the total electrical conductivity dependence of 1Ce10ScSZ solid electrolyte

Abstract

The influence of changes of structural components on the specific total electrical conductivity of different types of bulk 1Сe10ScSZ ceramics in the temperature range of 400―900 °С, which is working for intermediate-temperature solid oxide fuel cells, was studied. It is demonstrated that the dependence of the specific total electrical conductivity of different purity 1Ce10ScSZ ceramics on the porosity takes place in the temperature range ща 600―700 °С and is practically absent at high temperatures. The effect of average grain size on the temperature-normalized porosity-modified specific total conductivity is not detected in the whole studied range or chemically pure ceramics 1Ce10ScSZ of type II. The influence of the average grain size on the temperature-normalized porosity-modified specific total conductivity is proportional at low-temperature range, is decreasing with increasing temperature and, is practically absent, at 900 °C in technically pure 1Ce10ScSZ ceramics of type I. In technically pure 1Ce10ScSZ ceramics of type III it was observed the inverse situation: no dependence at low temperature and inversely proportional dependencies with increasing temperature. Full text download