Thermal shock behavior of alumina based refractories

Abstract

Temperature difference and fracture resistance parameters have been used to predict the thermal shock behavior. Alumina based commercial refractories with different content of Al2O3 from 28% to 78% were used. Thermal and mechanical properties were measured. Thermal shock stability of the samples was measured using water the quench test. Values of temperature difference were calculated using heat transfer conditions and material properties. Calculated values of temperature difference and fracture resistance parameters were compared to results of quench experiments. Linear regression analysis was used to determine the correlation between calaculated values for the critical temperature difference and the damage resistance parameter with the results of water quench test. Excellent correlation with the experimental results was observed for all used equations for prediction of thermal shock behavior of the samples. Correlation between damage resistance parameters, temperature difference and results from the water quench test also are presented.