Particle Size Control of Barium Titanate Prepared from Barium Titanyl Oxalate

Barium titanates formed from decomposition of barium titanyl oxalates (BT‐oxalates) exhibit the same powder state as that of the Bt‐oxalates, so that controlling the particle size and shape of the starting BT‐oxalates is necessary. In the present study, BT‐oxalates were precipitated from aqueous solution under various aging conditions: aging fluids, temperature, and time. The particle size of the spherical BT‐oxalates was controlled at 0.4 μm by aging at 25°C for 3 h, and the diameter of the barium titanate formed was similar to that of the BT‐oxalates.