Layered perovskite oxides of the system La1-xBa 1+xGaO4-δ were synthesized and their electrical conduction behavior was studied. The oxides of the composition range 0 ≤ x ≤ 0.2 were analyzed as a single orthorhombic phase with a K 2NiF4-type structure. In the presence of water vapor, proton conduction was observed due to the incorporation of water into the oxygen vacancies for these oxides. Below 350°C, La0.8Ba 1.2GaO3.9 was considered to be a pure proton conductor and the activation energy for proton conduction was measured as 0.77 eV. In a dry atmosphere, it exhibited mixed conduction consisting of oxygen ions and holes at a high oxygen partial pressure, p(O2), and showed only oxygen-ion conduction at an intermediate and low p(O2).
|Number of pages||4|
|Journal||Japanese Journal of Applied Physics|
|Issue number||1 A|
|Publication status||Published - 2005 Jan|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)