Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5150546 | Solid State Ionics | 2017 | 6 Pages |
Abstract
Proton concentration of La1.9Ca0.1Zr2O7 â α in H2O-O2 atmospheres has been measured by means of the method of high temperature thermogravimetry. The oxygen diffusion coefficient and the oxygen surface exchange coefficient have been measured for La1.9Ca0.1Zr2O7 â α over the temperature range of 600-900 °C using the oxygen isotope exchange method with gas phase equilibration. pO2-dependencies of the electrical conductivity have been determined in the temperature range 500-800 °C and oxygen partial pressure range of 10â 20 < pO2 < 0.21 atm in atmosphere saturated with water vapour at 25 °С (pÐ2Р= 0.03 atm). Ionic conductivity has been divided into protonic and oxygen-ionic components. The influence of oxygen defect structure on the water uptake, oxygen diffusivity and electrical conductivity of La1.9Ca0.1Zr2O7 â α has been discussed.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
E.P. Antonova, A.S. Farlenkov, E.S. Tropin, V.A. Eremin, A.V. Khodimchuk, M.V. Ananyev,