期刊
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
卷 87, 期 3, 页码 371-377出版社
AMER CERAMIC SOC
DOI: 10.1111/j.1551-2916.2004.00371.x
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A commercial submicrometer BaTiO3 powder was analyzed using X-ray photoelectron spectroscopy. The analysis revealed the powder surfaces to be covered with a layer of physisorbed H2O and chemisorbed -OH ions. A BaCO3 residual not detected with XPS was shown to be present in the powder using X-ray diffraction, suggesting that the carbonate takes the form of discrete particles rather than of a continuous surface layer. A relaxed surface phase detected in previous XPS analyses of bulk BaTiO3 was also shown to be present. Depth profiling revealed the powder surfaces to be Ti-rich, confirming the presence of a phase, or phases, to stoichiometrically balance the barium carbonate.
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