Preparation of barium titanate by homogeneous precipitation

The barium titanyl oxalate, which was the precursor of barium titanate, was prepared by homogeneous precipitation using the diethyl oxalate as a precipitating agent. The oxalate dried at 80 degrees C was the crystalline phase, which was converted to amorphous-like phase after drying at 120 degrees C. The weight loss of oxalate was 47.3 wt %. The chemical formula of the oxalate could correspond to BaTiO(C2O4)(2) . 4H(2)O. The barium titanate obtained from the calcination of oxalate at 850 degrees C was a tetragonal phase with a particle size of 0.2 mu m.