The influence of grinding process and minor additions like MgCO3 and TiO2 on sintering behaviour of technical grade commercial alumina has been studied with a view to making dense and impervious al...

Studies on Sintering of Technical Grade Alumina—Part II: Influence of Grinding and Minor Additions on Densification of Commercial Alumina

The sintering behaviour of Bayer grade alumina in the temperature range 1400°—1800°C in a partially reducing atmosphere is reported. A 1 wt% addition of titania is found to improve the sinterability of alumina appreciably. The pellet density after two hours of sintering was the highest at 1475°C. The microstructure of the sintered pellets showed enhanced but uneven grain growth compared to that of similar alumina pellets without the titania addition. They also showed that the titania addition did not form any eutectic phase with the impurities in the Bayer alumina during the sintering.

P. K. K. Nayar

Papers

Effect of Titania Addition on the Sintering of Alumina