Alumina vs. Forsterite

Both alumina and forsterite are oxide-based engineering ceramics. There are 9 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

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

Alumina (Aluminum Oxide, Al₂O₃)Forsterite (Mg₂SiO₄)

Metric UnitsUS Customary Units

Material Properties

Density, g/cm³		3.4 to 4.1
Density, g/cm³		2.1 to 3.1

Dielectric Constant (Relative Permittivity) At 1 MHz		7.8 to 11
Dielectric Constant (Relative Permittivity) At 1 MHz		6.2

Dielectric Strength (Breakdown Potential), kV/mm		8.9 to 12
Dielectric Strength (Breakdown Potential), kV/mm		7.9

Electrical Dissipation At 1 MHz		0.00049 to 0.0013
Electrical Dissipation At 1 MHz		0.00030

Flexural Strength, MPa		260 to 430
Flexural Strength, MPa		40 to 160

Specific Heat Capacity, J/kg-K		870 to 940
Specific Heat Capacity, J/kg-K		850

Thermal Conductivity, W/m-K		14 to 30
Thermal Conductivity, W/m-K		1.7 to 3.5

Thermal Diffusivity, mm²/s		3.7 to 10
Thermal Diffusivity, mm²/s		0.94 to 1.3

Thermal Expansion, µm/m-K		6.7 to 8.2
Thermal Expansion, µm/m-K		9.0 to 10

Alumina vs. Forsterite

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