PTFE vs. C-820 Magnesia Ceramic

PTFE and C-820 magnesia ceramic belong to fundamentally different material chemistries. PTFE is a polymeric material, while C-820 magnesia ceramic is ceramic. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 6 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown.

For each property being compared, the top bar is PTFE and the bottom bar is C-820 magnesia ceramic.

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Material Properties

Density, g/cm³		2.1 to 2.3
Density, g/cm³		2.7

Dielectric Constant (Relative Permittivity) At 1 MHz		2.1 to 2.4
Dielectric Constant (Relative Permittivity) At 1 MHz		9.6

Electrical Dissipation At 1 MHz		0.00017 to 0.050
Electrical Dissipation At 1 MHz		0.00030

Flexural Strength, MPa		13 to 50
Flexural Strength, MPa		53

Thermal Conductivity, W/m-K		0.24 to 0.65
Thermal Conductivity, W/m-K		8.0

Thermal Expansion, µm/m-K		110 to 120
Thermal Expansion, µm/m-K		11

PTFE vs. C-820 Magnesia Ceramic

Material Properties

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