Porous ceramic is a tough foam made of ceramic.

The manufacturing technique involves impregnating open-cell polymer foam with ceramic slurry and then firing it in a kiln, leaving only the ceramic material behind. Ceramic foam can be composed of a variety of ceramic materials. Common high-temperature ceramics include alumina, silicon carbide, zirconia, etc.

Characteristics of porous ceramics:

  • Uniform pore size and high surface area
  • Excellent chemical resistance in both acidic and alkaline conditions.
  • Good wear and corrosion resistance.
  • High-temperature resistance.
  • Good rigidity and dimensional stability.
  • Can be coated or fixed with almost any catalytic or other functional material.
  • High porosity and uniform pore size enable low resistance in gas and liquid flow applications.

Porous ceramic applications

Unlike asbestos and other ceramic fibers, ceramic foam is completely harmless and is the best insulating material. Its high strength and hardness also allow it to be used as a structural material in low-stress applications. Ceramic foams are also increasingly used in growing electronics applications, including electrodes, solid oxide fuel cells, and battery supports. Ceramic foam can also be used as a cooling component for electronic devices by separating the pumped coolant from the circuit itself.

Applications

  • Gas and liquid filters
  • Capillary electrophoresis
  • Filter heavy metal ions (Cr, Ni, etc.) in water
  • High-temperature chemical support for gas absorption
  • Efficient flow through the catalytic support
  • Gas burner
  • Chromatography
  • Micro-capture systems and biocatalytic carriers
  • Vacuum mounting plate (vacuum block)
  • Nanomembrane support for sensor applications
  • Microbubble diffuser
  • Thin channels or microchannels for electrophoresis
  • Chemical or biological reactors

This strong, uniformly porous ceramic has a 40-50% open porosity with a tortuous pore structure ranging from 0.25 to 90 microns. 

Monolithic, single-stage alumina porous ceramics are available in pore sizes of 6, 15, 30, 50, 60 and 120 microns.

Aluminum oxide is the most standard material, with a density of 2.2 g/cc and a maximum operating temperature of 1400 F (800 C).

Silicon carbide is more of a special order material with a density of 1.9 g/cc, a maximum operating temperature of 1800 F (1000 C) for harsher applications, and excellent thermal shock resistance. These standard porous ceramic materials are naturally hydrophilic. For special applications, they can be coated or impregnated to achieve specific performance characteristics.

Specially tailored technologies include:

  • Spraying
  • brush teeth
  • Backwash
  • Oven firing
  • Dilute acid cleaning
  • Solvent cleaning plus steam
  • Ultrasonic cleaning

The porous ceramic product range includes:

  • Membranes and monolithic tubes
  • CD
  • For plates and other components made of alumina and silicon carbide, tight control of pore size and porosity is critical.

We supply standard sizes for various kinds of industrial, details as follows:

Specifications

(mm)

Materials

Pore size (μm)

 

Color

Φ152×3.2

Al2O3

15

Light Coffee

Deep Blue

30/60

Φ203×3.2

Al2O3

30/60

Deep Blue

Light Coffee

Φ303×4.5

Al2O3

30/60

Deep Blue

Light Coffee

Φ303×4.5

SiC

30

Deep Blue

230×230×3.2

Al2O3

30/60

Deep Blue

Light Coffee

Edgetech Industries, Advanced Ceramics Division is a leading supplier of the highest quality porous ceramic products for a variety of applications. We are happy to advise on materials, design, and application. If you have any questions about alumina, boron nitride, zirconia, or other ceramic materials not listed on the website, please feel free to contact us.