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XPS study of the dehydration of clay and kaolin powders
Author(s) -
Wittberg T. N.,
Wang Pu Sen
Publication year - 1999
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/(sici)1096-9918(199910)27:10<936::aid-sia656>3.0.co;2-n
Subject(s) - x ray photoelectron spectroscopy , aluminosilicate , auger , dehydration , analytical chemistry (journal) , silicon , materials science , aluminium , chemistry , mineralogy , chemical engineering , metallurgy , environmental chemistry , catalysis , physics , biochemistry , engineering , atomic physics
X‐ray photoelectron spectroscopy (XPS) was used to analyze samples of a commercial clay powder and a kaolin standard. Samples were analyzed both in the as‐received condition and after heating to temperatures of ≥750 °C. There was a loss of water during heating that corresponded to the transformation from a clay to an aluminosilicate. The XPS measurements showed that there was a decrease in the O/(Al + Si) ratio and a decrease of 0.2–0.3 eV in the aluminum Auger parameter value. The silicon Auger parameter value was unchanged after heating. Copyright © 1999 John Wiley & Sons, Ltd.