Solution-Combustion Synthesis of MZrO3 Zirconates (M = Ca, Sr, Ba) in Open Reactor: Thermodynamic Analysis and Experiment

摘要

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 cp >0.4, 0.3, and 0.4, respectively.