Forsterite vs. PES

Forsterite and PES belong to fundamentally different material chemistries. Forsterite is a ceramic material, while PES is polymeric. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 9 material properties with values for both materials. Properties with values for just one material (22, in this case) are not shown.

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

Forsterite (Mg₂SiO₄)Polyethersulfone (PES)

Metric UnitsUS Customary Units

Material Properties

Density, g/cm³		2.1 to 3.1
Density, g/cm³		1.4

Dielectric Constant (Relative Permittivity) At 1 MHz		6.2
Dielectric Constant (Relative Permittivity) At 1 MHz		3.5

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

Electrical Dissipation At 1 MHz		0.00030
Electrical Dissipation At 1 MHz		0.0035

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

Specific Heat Capacity, J/kg-K		850
Specific Heat Capacity, J/kg-K		1100

Thermal Conductivity, W/m-K		1.7 to 3.5
Thermal Conductivity, W/m-K		0.18

Thermal Diffusivity, mm²/s		0.94 to 1.3
Thermal Diffusivity, mm²/s		0.12

Thermal Expansion, µm/m-K		9.0 to 10
Thermal Expansion, µm/m-K		53

Forsterite vs. PES

Material Properties

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