Densification and grain growth behavior of MgO and TiO2-doped alumina ceramics were investigated. MgO was found to inhibit grain growth and to promote densification, but TiO2 acted to promote grain growth more than densification. The density which sho...
Densification and grain growth behavior of MgO and TiO2-doped alumina ceramics were investigated. MgO was found to inhibit grain growth and to promote densification, but TiO2 acted to promote grain growth more than densification. The density which showed the maximum shrinkage rate was investigated in the plot of shrinkage rate versus density. The data suggests that the maximum shrinkage rate separates the two kinetic regimes, below the density of maximum shrinkage, the regime associated with densification and above the maxima, the regime associated with the grain growth. The plot exhibits a maximum which shifts to higher temperatures with MgO doping and to lower with TiO2 doping.