Studies on Thermal Decomposition of Barium Titanyl Oxalate by Factor Analysis of X-Ray Diffraction Patterns

摘要

Factor analysis was applied to study the thermal decomposition of barium titanyl oxalate (BTO) which is used as the precursor of barium titanate. BTO was synthesized in H2O solvent and calcined at various temperatures. The X-ray diffraction patterns were obtained to make the data matrix of peak intensity vs. 2ヨ. Abstract factor analysis and target transformation factor analysis were applied to this data matrix. It has been found that the synthesized BTO consists of the crystals of BaC2O4·0.5H2O and BaC2O4·2H2O as well as the amorphous solid of TiO-oxalate. The results also indicate that the BTO was transformed via BaCO3 to BaTiO3 and Ba2TiO4 during the thermal decomposition.