抄録
Mechanical behavior of the heatproof stove tile ceramic material Letovice, which consists of kaolinitic clays and quartz, and small amount of mica, calcite and feldspar, was studied using the non-destructive sonic resonant method mf-TMA. To find actual dimensions and the volume mass of the sample, thermodilatometry and thermogravimetry were carried out in the same temperature regime (20–1100°C, 5°C/min) as mf-TMA. It was found that liberation of the physically bounded water from the green mass makes Young’s modulus higher. Dehydroxylation of phyllosilicates and the α → β transformation of quartz affect Young’s modulus to a lesser degree. The collapse of phyllosilicates structure above 900°C and the creation of mullite cause an increase in Young’s modulus.
