Vladislav V. Kharton

TL;DR: In this paper, mixed oxygen ionic and electronic conduction was found for hexagonal lanthanum-tungsten oxide, La 2 W 1.25 O 6.75, at temperatures of 900-1450 K.

TL;DR: In this paper, the perovskite-type solid solution formation in the system La0.5−xSr0.6Fe0.4O3−δ was determined from X-ray diffraction and Mossbauer spectroscopy data to correspond to approximately 0-10% of the A-site concentration.

TL;DR: In this paper, mixed potassium antimonates have been shown to have relatively high ionic conductivity, presumably due to potassium cationic transport, with activation energies of 35{+-}2 and 33{+ −}1 kJ/mol, respectively.

TL;DR: In this paper, the total conductivity of CaFe 2 O 4-δ, studied in the oxygen partial pressure range from 10 -17 to 0.5 atm at 1023-1223 K, is predominantly p-type electronic under oxidizing conditions, and the oxygen ion transference numbers determined by the steadystate oxygen permeation and faradaic efficiency measurements vary in the range of 0.2 to 7.2 × 10 -4 at 1123-1273 K, increasing with temperature.

TL;DR: The stability and oxygen permeability of dense tubular membranes, made of (SrFeOO 3− δ ) 0.7 (srAl 2 O 4 )0.3 (SFSA) composite by cold isostatic pressing, were assessed under air/CO 2 and air/(CH 4 ǫ+CO 2 ) gradients at 973-1173 K as discussed by the authors.