Abstract
The oxygen in-diffusion, out-diffusion, and permeability of layered perovskite-type-like YBa 2Cu 3O 7− x (YBCO) were investigated by thermogravimetry, oxygen static adsorption, and oxygen permeability experiment. The results show that the oxygen in-diffusion at higher oxygen partial pressure is very faster, while the oxygen out-diffusion at lower oxygen partial pressure is relatively slow due to the formation of surface barrier. Oxygen permeation rate increases with temperature and arrives at 3.36×10 −7 mol/s cm 2 at 900 °C for a YBCO membrane with thickness 1.00 mm.
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