Effect of Excess MgO on the Properties of Cordierite Ceramic Sintered by Solid‐State Method

Abstract

The effect of excess MgO mole ratio on the sintering behavior of cordierite ceramic was studied using XRD and SEM. The green bodies were sintered at 1100–1300°C by solid‐state method. The excess MgO did not obviously reduce the crystallization temperature but increased the production of liquid and densification. This effect has to be activated by a specific temperature. The starting material had little influence on the crystallization phase at 1200°C or higher. As basic magnesium carbonate can also be used as a pore‐forming agent, the shrinkage and porosity approached maximum value at 3.4 mole ratio of MgO.