Effect of Forming Methods on the Properties of Controlled Porous Ceramics

Abstract

Two methods of forming, namely, semi-dry press and slip casting were used tofabricate porous ceramics from local raw materials, kaolin and silica. Differentwt.% of aluminum-zinc mixture powders were used as gas creative agent inchemical swelling method to create porosity in ceramic slurry before forming.Dried formed ceramics were fired at fourdifferent firing temperatures of (900, 1000, 1100 and 1200)°C.It was found that the forming technique has a great effect on the properties ofthe fabricated porous ceramics. From porosity point of view, slip casting is bettertechnique to produce high porous ceramics, but semi-dry pressing seems to begood for other physical properties and mechanical properties.