چكيده به لاتين
Calcium Hexaluminate is a material like alumina which is studied in many articles, recently. In this research, CA6 porous body was sintered by mixing Al2O3 and different CaO sources due to stoichiometric ratios in 1500, 1550 and 1600˚C for 1,2 and 3 hours. In this work, 33.33%, 40% and 45% of water addition was also studied. XRD analysis was done by JEOL and SEM micrographs were plotted by TESCAN VEGA/XMU. Then, bulk density, total porosity percentage and cold strength were investigated. In 1500˚C peaks of CA6 were not seen which means in this temperature CA6 phase is not formed. Increasing temperature causes formation of CA6, which is in contract by EDX analysis. Micro structure observation showe plate-like morphology. By increasing sintering time and temperature, density of samples was increased unlike porosity. Comparing samples produced by different sources shows using calcium aluminate cement as Precursor results more density and strength in same temperature. Furthermore, effect of adding Fe2O3 on CA6 was studied. Results showed Fe2O3 enhanced CA6 sintering at 1600˚C by solid solution formation.
