Alumina Foam

Alumina Foam is part of our extensive range of advanced ceramic materials. A rigid foam it has a highly porous structure with low density and high surface area. Its key properties include high temperature resistance, low thermal conductivity and high compressive strength. Alumina Foam is used in applications such as thermal insulation for high temperature furnaces, catalytic converters and lightweight structural components. We offer Alumina Foam in a range of 6 options for a choice of pore and porosities to suit different applications.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Sizes

Linear dimension		Nominal

Sizes

Thickness		Nominal
All Other		All other dimesions are Nominal

Material Properties for Ceramics

Chemical Resistance

Element	Value
Acids - concentrated	Good
Acids - dilute	Good
Alkalis	Good
Halogens	Good
Metals	Good

Electrical Properties

Element	Value
Dielectric constant	9-10.1
Dielectric strength( kV mm⁻¹ )	Oct-35
Volume resistivity( Ohmcm )	>10¹⁴@25

Physical Properties

Element	Value
Apparent porosity( % )	0
Water absorption - saturation( % )	0
Density( gcm⁻³ )	3.9

Thermal Properties

Element	Value
Melting point( C )	2100
Upper continuous use temperature( C )	1700
Specific heat( J K⁻¹ kg⁻¹ )	850-900@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	26-35@20°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	8@20-1000°C

Mechanical Properties

Element	Value
Tensile modulus( GPa )	300-400
Hardness - Knoop( kgf mm⁻² )	2100
Hardness - Vickers( kgf mm⁻² )	1500-1650
Shear strength( MPa )	330
Tensile strength( MPa )	260-300