A range of methods for the detection of barium carbonate contaminant in barium titanate powder has been assessed, namely: X‐ray diffraction (XRD), scanning electron microscopy (SEM), with EDS‐X‐ray microanalysis, Fourier transform infrared spectroscopy (FT‐IR), thermogravimetric analysis (TGA), gas chromatography (GC) for analysis of carbon, and X‐ray photoelectron spectroscopy (XPS). The most satisfactory procedure for the detection of the small amounts of BaCO 3 commonly present is FT‐IR. Surface analyses by XPS show that the carbonate is present as a discrete phase and is not a surface film on barium titanate particles.
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López et al. (1999) studied this question.
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