DefinePK

Abstract

Active silica from rice husk ash RHA was incorporated in a porcelain composition in substitution of quartz. The influence of the substitution on the bending strength, vitrification behavior and microstructure have been investigated. The treated husk was then subjected to calcinations at 700?C for six (6) hours, after which it was subjected to the XRF analysis. Pellets made with various proportions of kaolin, feldspar, quartz and RHA were pressed at different mould pressures (MP) of 31 MPa - 121 MPa and sintered at a temperature of 1200°C. Bending strength and porosity testing were carried out to the samples. Samples pressed at 91 MPa with 20 wt% of RHA exhibit maximum bending strength.