Production of α-Al2O3-3YSZ Porous Ceramics with α(γ)-Al2O3 Additive

alpha-Al2O3-3YSZ porous ceramics were fabricated using the slip casting method with the incorporation of 15 wt% of submicron Al2O3 powders as sintering additives. The materials were prepared by solution combustion synthesis using glycine or urea as fuels. Following firing of the ceramics at 1550 degrees C, the percentage of closed porosity was found to be in the range from 14.1 to 24.0%. The experimental results revealed a linear correlation between density and closed porosity of Al2O3-3YSZ corundum ceramics. Ceramic samples that underwent firing at 1550 degrees C exhibited relative density values ranging from 75 to 85%, accompanied by an open porosity of 0.90 to 1.71%. The findings indicate that the morphology of the used aluminum oxide additives synthesized through combustion exerts a predominant influence on the strength characteristics.