Abstract
A nanocermet-based oxygen disk membrane 60δ-Bi2O3/40(60Ag@40P), (P = La0.5Y0.3Pr0.2Cr0.5Fe0.3Mn0.2O3) that has passed the total degradation test at 500 °C for 500 h requires further optimization due to silver segregation, which is accelerated by the presence of a Pd catalyst in the contact. The solution to the problem of recrystallization and segregation of silver is based on optimizing the architecture of the membrane and replacing silver with a smart composite. A thin protective porous layer of mixed conductive ceramic is introduced between the catalytic and selective layers in the membrane architecture. As a smart composite that simultaneously performs various functions at different stages of the creation and operation of the membrane, a dual-core nanocomposite of the core-shell type is proposed using a homogeneous AgCu-alloy with a lower melting temperature as a matrix: AgCux@y(CuMn2)z(P*), where P* = La0.7Pr0.2Tb0.1Mn0.4Co0.3Ni0.3O3.
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