Processes involving high temperatures consume great amounts of energy, influencing the final cost of the products. Therefore, there is a clear market need for the development of refractory ceramics with insulating properties for high temperatures application. These materials should present small pores, low permeability, suitable mechanical resistance and low volumetric shrinkage. In this work, the influence of the suspensions in the properties of porous ceramic, obtained by foam incorporation into the ceramic suspension, was evaluated through porosity, linear shrinkage and mechanical strength measurements. The results showed that the appropriate choice of raw materials, as well as solids content of the suspension, resulted in larger porosity. Such aspects should provide porous ceramic with higher mechanical strength due to their superior strut density.
porous ceramic; insulating for high temperatures; gelcasting
