Thermal shock of ceramic material : Comparison of resistance parameter with the critical ΔT values ΔTc = ΔTc(Bi) of ceramic materials

Abstract

Thermal shock resistance of ceramic material can be characterized by using resistance parameters or critical temperature difference. Correlation between fracture resistance parameter, R and critical temperature difference, ΔTc was presented for four products (99% Al2O3, 86% Al2O3 , mullite and glass). Six equations representing dependence critical temperature difference on Biot number were used. Comparison of critical temperature difference as a function of Biot number with R parameter was also discussed. Statistical analysis was used to determine correlation between R parameter and critical temperature difference. This method showed that linear dependance was acceptibile to use in comparison R parameter with critical ΔTc values.