Transport properties of ZrV2O7-V2O5 composites with liquid-channel grain boundary structure

Abstract

Transport properties (conductivity, transport numbers of oxygen ions, oxygen permeability) are studied for new composites of ZrV2O7-25, 30, 35, 40 mol % of V2O5 with a liquid-channel grain boundary structure (LGBS) at 680–740°C. It is shown that the composite of ZrV2O7-40 mol % of V2O5 with LGBS has high selective oxygen permeability of 1.1 × 10−8 mol cm−2 s−1 (T = 740°C, $P'_{O_2 } $ = 0.21 atm, $P''_{O_2 } $ = 0.003 atm, L = 2 mm) and can be used as an ion-transport membrane for separation of oxygen from air.