CHARACTERIZATION OF Y3+-DOPED BaZrO3 SYNTHESIZED USING SUPERCRITICAL ETHANOL AT DIFFERENT REACTION TEMPERATURE

Abstract

Y^3+-doped BaZrO₃ (BZY) ceramic powder was prepared by a supercritical fluid method using ethanol as a reaction medium. The respective prepared samples were denoted as Z0, Z1, Z2 and Z3 at four different reaction temperatures with constant (4 MPa) reaction pressure. The formation of metal oxides and carbonate impurity in the samples were analyzed using Fourier transform infrared (FTIR) spectroscopy. The formation of single perovskite phase of BZY sample was identified by X-ray diffractometer (XRD). At 1100 °C, FTIR spectra showed that the carbonate residue still remains in the Z1, Z2 and Z3 samples. However, Z0 free from the carbonate species due to the decomposition of intermediate compounds were completely occurred. The high crystalline single perovskite phase of Z0 was matched to the ‘pure’ BaZrO₃ (JCPDs Card: 060399). It was found that the low reaction temperature of ethanol successful produced highly crystallization of BZY ceramic powder.