Mullite vs. Forsterite

Both mullite and forsterite are oxide-based engineering ceramics. There are 9 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is mullite and the bottom bar is forsterite.

Mullite Forsterite (Mg₂SiO₄)

Metric UnitsUS Customary Units

Material Properties

Density, g/cm³		2.7 to 3.0
Density, g/cm³		2.1 to 3.1

Dielectric Constant (Relative Permittivity) At 1 MHz		6.3
Dielectric Constant (Relative Permittivity) At 1 MHz		6.2

Dielectric Strength (Breakdown Potential), kV/mm		16 to 17
Dielectric Strength (Breakdown Potential), kV/mm		7.9

Electrical Dissipation At 1 MHz		0.0025
Electrical Dissipation At 1 MHz		0.00030

Flexural Strength, MPa		130 to 160
Flexural Strength, MPa		40 to 160

Specific Heat Capacity, J/kg-K		950
Specific Heat Capacity, J/kg-K		850

Thermal Conductivity, W/m-K		3.5 to 11
Thermal Conductivity, W/m-K		1.7 to 3.5

Thermal Diffusivity, mm²/s		1.4 to 3.7
Thermal Diffusivity, mm²/s		0.94 to 1.3

Thermal Expansion, µm/m-K		5.8
Thermal Expansion, µm/m-K		9.0 to 10

Mullite vs. Forsterite

Material Properties

Find Materials

Table of Contents