KONA Powder and Particle Journal (Jun 2014)

An XPS Investigation of Hydrothermal and Commercial Barium Titanate Powders

  • C. C. Hung,
  • R. E. Riman

DOI
https://doi.org/10.14356/kona.1990017
Journal volume & issue
Vol. 8, no. 0
pp. 99 – 104

Abstract

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Hydrothermal and commercial barium titanate powders were examined for undesirable impurity phases. Compositional differences in the powder were evaluated using x-ray diffraction (XRD), x-ray fluorescence (XRF), and x-ray photoelectron spectroscopy (XPS). A barium-rich impurity phase, virtually undetectable by XRD, was detected via XPS. Barium impurity phase peaks were detected at binding energies @1.5 eV higher than those characteristic of barium in a barium titanate bonding state for both the Ba 3d and Ba 4d transitions. Simple curve-fitting techniques were used to quantify the percentage of barium in a barium titanate bonding state versus another barium bonding state for each set of doublets. The barium impurity bonding state accounted for 20-50 mol% of the barium detected by XPS.