Forsterite vs. Alumina

Both forsterite and alumina 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 forsterite and the bottom bar is alumina.

Forsterite (Mg₂SiO₄)Alumina (Aluminum Oxide, Al₂O₃)

Metric UnitsUS Customary Units

Material Properties

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

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

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

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

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

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

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

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

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

Forsterite vs. Alumina

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