OS1604 Mechanical behaviour of barium cobaltite around room temperature
Details
Ba_<0.5>Sr_<0.5>Co_<0.8>Fe_<0.2>O_<3-δ>(BSCF) has emerged to be a promising candidate as cathode for solid oxide fuel cells (SOFCs) and as oxygen separation membrane because of its high electronic and ionic conductivity. On the other hand, an anomaly in mechanical behavior around room temperature has been pointed out. The present study investigated the mechanical behavior of BSCF at room temperature. An unusual strain oscillation was observed in the temperature range from 273 K to 303K. Elastic modulus significantly decreased from 80GPa to 60GPa over the room temperature. The linear expansion coefficient peaked at 17μK^<-1> around 350K.
