Calcium carbonate thermal decomposition in white-body wall tile during firing. II. Influence of body thickness and calcite content

The thermal decomposition process of the calcium carbonate (calcite powder) contained in porous ceramic pieces, with the same composition as that used industrially to manufacture white-firing wall tile bodies, was studied using test disks with different thicknesses and calcite concentrations. The experiments were conducted in a CO2-free air atmosphere, and the results confirmed the validity of the kinetic model and the equation proposed in a previous paper to reproduce the experimental results in the studied range of operating conditions.