Processing of Porous Ceramics Using Natural Foaming Agent

Abstract

The aim of this work was to fabricate Porous Alumina ceramics direct foaming method using Amphipathic Glycoside as the foaming agent and a pore former. The porosity in the porous body was dependent on the foam stability, Nature of the binder, Al2O3 amount in the slurry and slurry preparation method. Thus, processing parameters like drying temperature, slurry preparation process, binder concentration, pore former concentration and solid loading was optimized. This optimized composition resulted in the fabrication of a porous body after sintering. To further stabilize the foam and to get an interconnected porous body Glycerol was added to increase the foam stability and particle attachment to the foam. In this study, it is found that with a rise in pore former concentration, apparent porosity decreased. But with an increase in solid loading apparent porosity increases due to particle attachment to the foam. When we added glycerol to the slurry along with a change in slurry preparation method, interconnectivity between pores increased.