Characterisation of silica-alumina ratio in ceramic porcelain materials

Abstract

Ceramic porcelain were fabricated with different quantities of alumina-silica (from 0-50 wt% silica) with fixed amount of feldspar (25 wt%) and kaolin (20 wt%). These ceramic porcelain samples were sintered at 900 °C for 4 hours. The effect of different addition ratio of alumina-silica on the structural and physical of the ceramic porcelain materials were assessed by X-ray diffraction, density, apparent porosity, water absorption and firing shrinkage. The results shown that the XRD diffraction pattern exhibited good phase changes in sample A35S15. The water absorption rate were optimum in this composition and the density is 9.76 % gcm-3 and 1.9 % of apparent porosity. Based on the results, the structural and physical properties of ceramic porcelain with 35 wt% alumina and 15 wt% silica (A35S15) is identified as ideal composition for ceramic porcelain industry.