Defect chemistry and ozygen permeation property of Pr2Ni0.75Cu0.25O4 ozide doped with Ga
Mixed conductivity and oxygen permeation property in Pr2Ni0.75Cu0.25Ga0.05O4 were investigated. After examining various Ga concentrations, it was found that cation excess composition of Pr2Ni0.75Cu0.25Ga0.05O4 achieved the highest oxygen permeability of 298 μmol·mn-1cm-2 (6.68cc·min-1cm-2) at 1273 K from air to He with a 0.5 mm thickness. The oxygen permeability of Pr2Ni0.75Cu0.25Ga0.05O4 increased with increasing the activity of surface catalyst and the highest permeation was achieved when La0.9Sr0.1Co0.8Fe0.2O3 was used for the surface catalyst. The oxygen nonstoichiometry was further studied by using thermogravimetry. It was confirmed that the excess amount of oxygen was introduced at high Po2 range, which might be the origin of the high oxygen permeation rate in this oxide.
Ozygen permeation K2NiF4 structure Ozygen nonstoichiometry Surface catalysts
Tatsumi Ishihara Kenichi Nakashima Sachio Okada Makiko Enoki Hiroshige Matsumoto
Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Motooka 744, Nishi-Ku, F Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Motooka 744, Nishi-Ku, F
国际会议
The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)
上海
英文
1367-1371
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）