Linear regression analysis of oxygen ionic conductivity in co-doped electrolyte

摘要

A mathematical model for the estimation of oxygen-ion conductivity of doped ZrO2 and CeO2 electrolytes was established based on the assumptions that the electronic conduction and defect association can be neglected. A linear regression method was employed to determine the parameters in the model. This model was confirmed by the published conductivity data of the doped ZrO2 and CeO2 electrolytes. In addition,a series of compositions in Ce0.8Gd0.2-xMxO1.9-δ system (M is the co-dopant) was prepared,their high temperature conductivity were measured. The model was further validated by the measured conductivity data.