Oxygen permeability of perovskites in the system SrCoO3 − δSrTiO3

✍ Scribed by V.V. Kharton; Li Shuangbao; A.V. Kovalevsky; E.N. Naumovich

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 930 KB
• Volume: 96
• Category: Article
• ISSN: 0167-2738
• DOI: 10.1016/s0167-2738(96)00594-2

✦ Synopsis

Existence of two concentration ranges of solid solutions with cubic perovskite-like structure has been ascertained in the srcoo,_,-SrTiO, system. It has been found that an increase in titanium concentration in SrCo, _ <Ti,O,_, leads to a decrease in electrica! conductivity and oxygen permeability of cubic solid solutions. Oxygen transfer through ceramics SrCo(Ti)O, 8 has been shown to be limited by the process of oxygen exchange with gas phase. Application of platinum layers on the surface of cobaltites-titanates results in substantial buildup of oxygen permeability. Thermal expansion coefficients of the above oxide materials lie in the range II -21 X 10mh K '.