Preparation of Cordierite Ceramics from Coal fly Ash and Basic Magnesium Carbonate Mixtures

Abstract

Sintering behavior of the mixtures of coal fly ash (CFA) and basic magnesium carbonate (BMC) was investigated to obtain cordierite ceramics. CFA and BMC were mixed in a mass ratio of 0-50%. Mixtures which added alumina to adjust to the stoichiometric composition of cordierite were similarly prepared. The green compacts were fired in air between 1100-1400C. Ceramics which consisted of cordierite and glass phase were obtained. The cordierite content in ceramics was almost equal to the value calculated from the composition of the green compacts. Apparent porosity and three point bending strength were 10-30% and 55-87MPa respectively.