Effect of Milling Process and Calcination Temperature on the Properties of BSCF-SDC Composite Cathode

摘要

The ionic conductivity, super conductivity, ferroelectricity, and magnetic resistance of barium strontium cobalt ferrite (BSCF) make it a good solid cathode material. This study aims to investigate the behaviour of nanocomposite cathode BSCF-samarium-doped ceria (SDC) on influence of milling process and calcination temperature. There is two type of milling process involve mixing the BSCF-SDC composite powders, namely, wet milling and dry milling process. The composite cathode powders were mixed through wet milling by high-energy ball milling at 550 rpm for 2 hours. For dry milling, the powders were milled at 150 rpm for 30 minutes. The powders then underwent calcination at 900°C, 950°C, 1050°C and 1150°C for 2 hours. The composite cathodes were examined on the basis of phase and microstructure through field emission scanning electron miscroscopy (FESEM) and x-ray diffraction (XRD), respectively. In conclusion, selection of suitable milling process and calcination temperature is important in eliminating secondary phases in BSCF-SDC composite cathodes and in enhancing their properties.