The proton conduction and hydrogen permeation characteristic of Sr(Ce0.6Zr0.4)(0.85)Y0.15O3-delta ceramic separation membrane

摘要

In this study, proton-conducting Sr(Ce0.6Zr0.4)(0.85)Y0.15O3-delta perovskite is synthesized using the citrate-ethylenediaminetetraacetic acid (EDTA). complexing method. The crystal structure, sintering behavior, coefficient of thermal expansion (CTE), electrical conductivity, electrochemical performance and hydrogen permeation of the Sr(Ce0.6Zr0.4)(0.85)Y0.15O3-delta is determined for various atmospheres and partial pressures of water. Sr(Ce0.6Zr0.4)(0.85)Y0.15O3-delta is extremely dense after sintering at 1450 degrees C for 6 h. The structure of the Sr(Ce0.6Zr0.4)(0.85)Y0.15O3-delta does not change after heat treatment in a hydrogen atmosphere at a partial pressure of water of 4.93 x 10(-2) atm. The CTE of the Sr(Ce0.6Zr0.4)(0.85)Y0.15O3-delta at temperature of 100-900 degrees C is 11.4 x 10(-6) K-1. The electrical conductivity of the sample is 0.012 S cm(-1) at 900 degrees C. The hydrogen permeation flux increases from 0.1 to 0.184 mmol min(-1) cm(-2) as the temperature increases from 500 degrees C to 800 degrees C. (C) 2014 Elsevier Ltd. All rights reserved.