SYNTHESIS OF Y3+-DOPED BaCeO3 BY SUPERCRITICAL ETHANOL USING HIGH-PRESSURE–HIGH-TEMPERATURE (HP-HT) BATCH WISE REACTOR SYSTEM

Abstract

A supercritical fluid technique was used to synthesize Y3+-doped BaCeO3 (BCY) ceramic compound by a High-Pressure–High-Temperature (HP-HT) Batch-Wise Reactor System. The samples were synthesized using ethanol as reaction medium at four different reaction temperatures with constant pressure. The respective prepared samples were denoted as C0, C1, C2 and C3. Chemical bonding of the reaction product was determined by a Fourier transform infrared (FT-IR) spectroscopy. All the calcined powder formed single perovskite phase of BaCeO3 (JCPDS card 822425) as proven by X-ray Diffractometer (XRD). C0 and C1 were free from impurity as transmittance peak associated to the carbonate phase was not detected in the FTIR spectrum. However, traces of carbonate residue were detected for C2 and C3 samples which indicate the incomplete reaction of the intermediate compounds. Therefore, it is found that the low reaction temperature during the synthesizing process gives better characteristics of BCY ceramic powder compared to high reaction temperature of ethanol.