Abstract
We fabricated porous alumina ceramics from a technique for making a cake. Polyvinyl alcohol (PVA), methyl cellulose (MC), and granulated sugar (SUGAR) were used as additives to give the alumina slurry the foaming property and the foam stability. The alumina slurry with PVA, MC, and SUGAR became creamy by mixing for 2.5 min by an electric mixer at 940 rpm. The creamy alumina slurry was able to be extruded by a forcing bag and smoothed by a blade. The creamy alumina slurry dried at 45°C, and then was sintered at 1600°C to a density of about 20%. The pore sizes in the sintered porous alumina ceramics were 0.2 mm or less. The flexural strength of sintered porous alumina ceramics with 78% porosity was 12 MPa.
