In this study, proton-conducting Sr(Ce 0.6 Zr 0.4 ) 0.85 Y 0.15 O 3-δ 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(Ce 0.6 Zr 0.4 ) 0.85 Y 0.15 O 3-δ is determined for various atmospheres and partial pressures of water. Sr(Ce 0.6 Zr 0.4 ) 0.85 Y 0.15 O 3-δ is extremely dense after sintering at 1450°C for 6h. The structure of the Sr(Ce 0.6 Zr 0.4 ) 0.85 Y 0.15 O 3-δ does not change after heat treatment in a hydrogen atmosphere at a partial pressure of water of 4.93×10 -2 atm. The CTE of the Sr(Ce 0.6 Zr 0.4 ) 0.85 Y 0.15 O 3-δ at temperature of 100-900°C is 11.4×10 -6 K -1 . The electrical conductivity of the sample is 0.012Scm -1 at 900°C. The hydrogen permeation flux increases from 0.1 to 0.184mmolmin -1 cm -2 as the temperature increases from 500°C to 800°C.
|Number of pages||8|
|Journal||Journal of the European Ceramic Society|
|State||Published - 1 Jan 2015|
- Hydrogen membrane
- Phase stability