XPS Study of Iron Phosphate Glasses
X-ray photoelectron spectroscopy (XPS) has been used to characterize the short range structure of iron phosphate glasses. Quantitative Fe2+/Fe3+ ratios determined by decomposing the Fe3p spectra are in good agreement with valence measurements made by Mossbauer spectroscopy. Fe2+ is preferred when [Fe]/[P] is low, whereas Fe3+ is preferred when [Fe]/[P] is greater than approximately 0·4. Increasing [Fe]/[P] decreases the bridging to nonbridging oxygen ratio determined from the O1s spectra. It is shown that a quantitative relationship exists between this latter ratio and the glass composition and average Fe valence.
R. K. Brow et al., "XPS Study of Iron Phosphate Glasses," Physics and Chemistry of Glasses, Society of Glass Technology, Jan 1994.
Materials Science and Engineering
Article - Journal
© 1994 Society of Glass Technology, All rights reserved.
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