Synthesis of BaTiO3 powder from barium titanyl oxalate (BTO) precursor employing microwave heating technique

摘要

Cubic barium titanate (BaTiO₃) powder was synthesized by heating barium titanyl oxalate hydrate, BaTiO(C₂O₄)$_{2}cdot$4H₂O (BTO) precursor in microwave heating system in air at 500?°C. Heating BTO in microwave above 600?°C yielded tetragonal form of BaTiO₃. Experiments repeated in silicon carbide furnace showed that BaTiO₃ was formed only above 700?°C. The product obtained was cubic.