Porosity has been a significant problem for many years in ceramics manufacturing and application so scientists, engineers make every effort to investigate the mechanism of the pore generation in ceramic material and to improve the processing routes that can produce ceramics with zero porosity.

Porous ceramics finds it a lot of new applications in industrial areas, however, because the porosity of ceramic material can be arranged in a well-defined and homogeneous manner or heterogeneously on the other hand and offers the ceramic material many special characteristics ranging from an increased surface area, to permeability, to the control of heat transport within the structure, to the maximization of the strength/density ratio.