Abstract
Nanosized barium zirconate (BaZrO3) is prepared from its oxalate precursor, barium zirconyl oxalate (BZO). The decomposition of BZO precursor was studied by thermogravimetry, differential thermal analysis, fourier transform infra red spectroscopy (FTIR), and X-ray diffraction (XRD) techniques. FTIR and XRD study reveals that BZO precursor calcined at 1173 K for 2 h gives nanosized perovskite type cubic BaZrO3 powder. The transmission electron microscope study shows that BaZrO3 particles prepared at 1173 K is nearly spherical in shape with diameter of 40–75 nm. Particle size study was carried out to investigate particle size distribution of BaZrO3 particles. Band gap of BaZrO3 was estimated from UV–visible spectroscopy data. Impedance measurement study shows that dielectric constant of BaZrO3 prepared in this work is 31.69 at 10 kHz.
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