Characterization of phase transformation and thermal behavior of Sedlecky Kaolin

摘要

The authors have examined how the properties are changing using different sinteringtemperature based on the kaolin. Kaolin powder and a mixture of kaolin and 10 m alumina was made and measured their sintering properties (TG, DTG, DTA, height). Pellets were compacted from the powders and sintered at 450 degrees C, 575 degrees C, 775 degrees C, 870 degrees C, 1100 degrees C temperature. The volume shrinkage, sintering weight losses, microstructure and phase composition of sintered specimens were investigated. In the case of sintering at 450 degrees C the volume of the samples increased; with a further increase of the temperature a continuous volume decrease can be observed.