Oxygen permeability of perovskite-type BaBi1−xLaxO3−δ

Oxygen permeability, electrical conductivity, and thermal expansion of BaBi1−xLaxO3−δ (x = 0, 0.2, and 0.4) perovskite-like solid solutions have been found to decrease with lanthanum content. Thermal expansion coefficients of the ceramics are (11.9–12.8) × 10−6 K−1. Oxygen transport through the BaBi(La)O3−δ dense ceramic membranes within the membrane thickness range of 0.6 < d < 1.2 mm has been shown to be limited by both bulk ionic conductivity and surface exchange rate.