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研究了具有氧离子导电性和电子导电性的钴系钙钛矿型复合氧化物混合导电体材料中氧的选择性透过能力,考察了该体系中 A 位低价金属离子置换量、置换金属离子的种类及 B 位置换金属离子的种类对氧的透过率的影响.结果表明:改变钙钛矿型复合氧化物的组成,提高材料中氧空位浓度和氧离子导电率,有利于提高氧离子的扩散速度,即提高氧的透过率和降低氧透过的起始温度.将钙钛矿型复合氧化物混合导电体氧透膜与固体电解质氧透膜进行了比较,前者具有结构简单的优点,有希望成为一种新型高温氧分离膜介质材料.
The selective permeation of oxygen in the cobalt-based perovskite-type composite oxide mixed conductor material having oxygen ion conductivity and electron conductivity was investigated. The substitution amount of the low-valent metal ion in the system A, The results showed that changing the composition of perovskite-type composite oxide and increasing the oxygen vacancies and the oxygen ion conductivities of the materials favored the increase of oxygen Ion diffusion rate, that is, to improve the permeability of oxygen and reduce the starting temperature of oxygen permeation perovskite composite oxide mixed with oxygen permeable membrane and solid electrolyte oxygen permeable membrane were compared, the former has a simple structure The merits of hope to become a new type of high temperature oxygen separation membrane dielectric material.