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钙钛矿型的复合氧化物,如La_(1-x)Sr_xCoO_3和La_(1-x)Sr_xNiO_3等,既具有高的电子导电能力,又具有高的氧离子传导能力,以其为主体的一类膜被称为混合导电型透氧膜,其透氧机理是:在膜的高氧压侧的氧分子被膜表面吸附后接收电子成为O~(2-)离子,然后通过膜体扩散到膜的另一侧,即低氧压侧,并在表面给出电子,然后进入气相,成为氧分子.与固体电解质膜,多γ-Al_2O_3膜以及有机透氧膜相比较,混合导电型陶瓷透氧膜对O_2有100%的选择性,氧透过率高(1100K时
Perovskite-type composite oxides, such as La 1-x Sr x CoO 3 and La 1-x Sr x NiO 3, have both high electron conductivity and high oxygen ion conductivity. The type of membrane is called hybrid conductive oxygen-permeable membrane. The mechanism of oxygen permeation is as follows: the oxygen molecules on the high oxygen pressure side of the membrane adsorb on the surface of the membrane and then receive the electrons as O ~ (2-) ions and then diffuse through the membrane to the membrane The other side, that is, the low oxygen pressure side, and gives electrons on the surface, and then into the gas phase to become oxygen molecules.Compared with the solid electrolyte membrane, multi-γ-Al 2 O 3 membrane and organic oxygen permeation membrane, The membrane has a 100% selectivity for O 2 with high oxygen permeability (at 1100 K)