DSC and TGA of a Kaolin-Based Ceramics with Zeolite Addition During Heating up to 1100 °C

Differential scanning calorimetry (DSC) and termogravimetric analysis (TGA) are used to study a kaolin-based ceramics with zeolite addition during heating up to 1100 degrees C. The samples are prepared from Sedlec kaolin (Czech Republic) and from zeolite from Nizny Hrabovec (Slovakia). DSC and TGA are performed on powder samples (5 mixtures) where (0-50) mass% of kaolin is replaced by zeolite. Also pure kaolin and zeolite samples are studied. The DSC measurements are carried out in a dynamic argon atmosphere with linear heating rate of 5 degrees C/min from 30 degrees C to 1100 degrees C. The same temperature regime is used for the TG measurements but in a dynamic atmosphere of dry air. The results show that the increasing amount of zeolite in samples causes reductive effect of processes which occurs during thermal treatment of kaolin.