Comparison between forming reactivity and densification of aluminum titanate starting from various alumina qualities

The reactive sintering of Al2TiO5 has been studeid at 1450 and 1500°C for three different commercial alpha-aluminas and one with high gamma-alumina content. The conversion rate of this latter alumina is very high but to have it sintered a higher firing temperature is required. The sinterability of aluminium titanate starting from a low cost commercial alpha-alumina with that from an expensive high purity alumina and therefore this oxide seems commercially promising. MgO additions as little as 2 wt.% strongly improve the reactive sintering process from the alpha-aluminas and always reduce the average grain size.