Oxygen permeability, electrical conductivity, and thermal expansion of
BaBi1-xLaxO3-delta (x = 0, 0.2, and 0.4) perovskite-like solid soluti
ons have been found to decrease with lanthanum content. Thermal expans
ion coefficients of the ceramics are (11.9-12.8) x 10(-6) K-1. Oxygen
transport through the BaBi(La)O3-delta 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. (C)
1998 Elsevier Science Ltd.