The Comparison of MgO and TiO2 Additives Role on Sintering Behavior and Microstructures of Reaction-Sintered Alumina-Zirconia-Mullite Composite

Alumina-mullite-zirconia ceramic composites were prepared by reaction sintering of alumina, zircon mixture and the sintering aids of magnesia and titania at temperatures of 1400 and 1600 ºc for 2 hours. the development of different phases and microstructures of the composites were analysed to assess the relative influence of the additives on the formation of alumina-zirconia-mullite composite. bulk density, phase combination, and microstructure of the sintered samples were examined by archimedes method, x-ray diffraction (xrd) and scanning electron microscope (sem), respectively. the results of the study revealed the successful formation of the alumina-mullite-zirconia composite by the reaction sintering method at temperature of 1600ºc. by the same token, the sample containing 6 wt.% of sintering aid shows improvement in density.