Ba_<0.58>Sr_<0.4>Co_<0.2>Fe_<0.8>O_<3-δ> (BSCF) has been developed as oxygen separation membrane because of its high electronic and ionic conductivity. I BSCF membrane in service could be subjected to thermal and chemical stresses due to gradient of oxygen partial pressure and temperature through the membrane. Therefore, the stress effect on the separation performance has been an issue of concern. In this study, we investigate d the electrical conductivity of BSCF under compressive loadings at various temperatures. It was found that the electrical conductivity increases with increasing the stress, which can be attributed to piezoresistivity. The piezoresistive effect at room temperature was smaller (〜0.6%) than compared to the ones at the elevated temperatures (〜1.5%), which might be related to the the elastic modulus.
