Porous ceramics are a class of highly reticulated ceramic material that covers a wide range of structures, such as foams, honeycombs, interconnected rods, fibers, or hollow spheres.
Porous ceramics are featured in their unique combination of valuable properties, which makes them useful in a variety of special and advanced engineering applications. These properties are:
- low density
- low thermal conductivity
- low dielectric constant
- high thermal shock resistance
- high specific strength
- high chemical resistance
Typical applications for porous ceramics products include:
- Thermal and acoustic insulation
- Impact absorption
- Catalyst supports
- Lightweight structures
- Porous burners
- Energy storage and accumulation
- Biomedical devices
- Gas sensors
- Sonar transducers
Porous ceramic products cover wide range of advanced ceramic materials, which can be oxides ceramics: alumina, zirconia, or non-oxides ceramics:carbides, borides, nitrides, silicides.
The properties of porous ceramic product depend on three main factors: the properties of the ceramic material of which the product is made; the topology (connectivity) and shape of the pores; and the relative density of the product.