Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Studies on Thermal Decomposition of Barium Titanyl Oxalate by Factor Analysis of X-Ray Diffraction Patterns

  • Seungwon Kim (Department of Chemical Engineering. Yosu Fisheries University) ;
  • Sang Won Choi (Department of Chemical Engineering. Yosu Fisheries University) ;
  • Woo Young Huh (Department of Chemistry, Hanyang University) ;
  • Myung-Zoon Czae (Department of Chemistry, Hanyang University) ;
  • Chul Lee (Department of Chemistry, Hanyang University)
  • Published : 1993.02.20
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Abstract

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 $H_2O$ solvent and calcined at various temperatures. The X-ray diffraction patterns were obtained to make the data matrix of peak intensity vs. 2${\theta}$. 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 $BaC_2O_4{\cdot}0.5H_2O\;and\;BaC_2O_4{\cdot}2H_2O$ as well as the amorphous solid of TiO-oxalate. The results also indicate that the BTO was transformed via $BaCO_3\;to\;BaTiO_3\;and\;Ba_2TiO_4$ during the thermal decomposition.

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