Abstract
Ceramics have remarkable temperature dependencies of thermal properties that have important role in thermal shock behavior. Thermal shock parameters (R sub 1C and R sub 2C ) of silicon nitride, alumina and mica ceramics were measured by an infrared radiation heating technique at various pre-heating temperatures. Thermal shock parameters decreased with increasing of pre-heating temperature, because of the temperature dependencies of thermal properties of ceramics. These results suggested that thermal shock behavior of ceramics should be estimated using a data with different testing temperature.