![[ Visit Client Website ]](images/banner.gif)
Friday, November 6, 2009: 4:40 PM
Pancho Villa (Camino Real Hotel)
Abstract
Phase evolution in triaxial porcelain bodies was studied by infrared and Raman spectroscopy, and confirmed by SEM, X-ray diffractometry and DTA. Thermal transformations in kaolinite, anorthoclase and α-quartz raw materials, showed dehydroxylation of kaolinite, anortoclase to sanidine transformation, feldspars melting and reacting with clays to form mullite. The quartz IR overlapping drawbacks detection in particular the α-β quartz conversion at the 700-1300 cm-1 region were overcome by the use of Raman spectroscopy. The characteristic 1131, 994 absorption IR bands allowed mullite detection at 11500C. While the 1074, 790, 1131, 994 deconvoluton bands showed a glass and mullite increasing tendency as temperature changed from 1150 to 13000C. SEM gives evidence of the primary to secondary mullite transformation via topotactic and liquid phase crystallization respectively.
Phase evolution in triaxial porcelain bodies was studied by infrared and Raman spectroscopy, and confirmed by SEM, X-ray diffractometry and DTA. Thermal transformations in kaolinite, anorthoclase and α-quartz raw materials, showed dehydroxylation of kaolinite, anortoclase to sanidine transformation, feldspars melting and reacting with clays to form mullite. The quartz IR overlapping drawbacks detection in particular the α-β quartz conversion at the 700-1300 cm-1 region were overcome by the use of Raman spectroscopy. The characteristic 1131, 994 absorption IR bands allowed mullite detection at 11500C. While the 1074, 790, 1131, 994 deconvoluton bands showed a glass and mullite increasing tendency as temperature changed from 1150 to 13000C. SEM gives evidence of the primary to secondary mullite transformation via topotactic and liquid phase crystallization respectively.