Highly porous ceramics are mostly used for their high permeability, low thermal conductivity, or open porosity which makes them useful in tissue engineering , as catalyst supports , photocatalysis , oil/water separation , or in filtration applications . However, their presence in technological fields where these functional properties have a crucial importance -energy harvesting, environment, or biomedicine-is still moderate. One of the main barriers to a wider application is the inherent brittleness of ceramic materials, resulting in brittle fracture at low load levels. Highly porous ceramics are often so weak that even their handling can be challenging.