Synthesis of Nanosized CaZrO₃ from Oxalate Precursor

ABSTRACT

Nanosized calcium zirconate (CaZrO₃) was synthesized from its oxalate precursor, calcium zirconyl oxalate (CZO). Thermogravimetry, differential thermal analysis, and X-ray diffraction techniques were used to characterize the precursor and optimize the processing conditions. Thermogravimetry and differential thermal analysis study shows that CZO precursor decomposes through three steps gives final product CaZrO₃ above 700°C. XRD study shows that pure CaZrO₃ phase is formed at 800°C. Particle size of CaZrO₃ powder was measured using transmission electron microscope and distribution of particles was studied using particle size analyzer. The band gap and dielectric constant of the CaZrO₃ were calculated.

KEYWORDS:

• electroceramics
• fuel cells
• heat treatment
• thermal properties
• x-ray techniques