Solution-combustion synthesis of MZrO3 zirconates (M = Ca, Sr, Ba) in open reactor: Thermodynamic analysis and experiment

Resumo

Solution-combustion synthesis (SCS) of MZrO₃ zirconates (M = Ca, Sr, Ba) in an open reactor with glycine as a fuel was studied both experimentally and theoretically. Calculated thermal effects of the above SCS reactions were found to reasonably agree with experiment. The measured thermal effects of SCS reactions (ΔT_max) as a function of fuel/oxidant ratio (φ) exhibited a maximum within the range φ = 0.9–1.3 arising due to increasingly growing radiative heat loss from the open surface of burning reactive mixture. The occurrence of self-sustained SCS reactions yielding CaZrO3, SrZrO₃, and BaZrO₃ was found possible for φ ≥ 0.4, 0.3, and 0.4, respectively.