XPS study of the dehydration of clay and kaolin powders

✍ Scribed by Wittberg, T. N.; Wang, Pu Sen

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 77 KB
• Volume: 27
• Category: Article
• ISSN: 0142-2421
• DOI: 10.1002/(sici)1096-9918(199910)27:10<936::aid-sia656>3.0.co;2-n

✦ Synopsis

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 Y 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.