PTFE vs. Alumina-lime-silica Glass

PTFE and alumina-lime-silica glass belong to fundamentally different material chemistries. PTFE is a polymeric material, while alumina-lime-silica glass is ceramic. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 5 material properties with values for both materials. Properties with values for just one material (20, in this case) are not shown.

For each property being compared, the top bar is PTFE and the bottom bar is alumina-lime-silica glass.

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Material Properties

Density, g/cm³		2.1 to 2.3
Density, g/cm³		2.8

Electrical Dissipation At 1 MHz		0.00017 to 0.050
Electrical Dissipation At 1 MHz		0.0026

Electrical Resistivity Order of Magnitude, 10^x Ω-m		2.0 to 18
Electrical Resistivity Order of Magnitude, 10^x Ω-m		12

Flexural Strength, MPa		13 to 50
Flexural Strength, MPa		46

Thermal Expansion, µm/m-K		110 to 120
Thermal Expansion, µm/m-K		4.3

PTFE vs. Alumina-lime-silica Glass

Material Properties

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