High density SIGRATHERM flexible graphite foil is a homogeneous material manufactured from natural graphite without the use of adhesives or binders.
SIGRATHERM HD graphite foil’s excellent thermal as well as electrical conductivity are both anisotropic, i.e. have a high degree of directional dependence. As the degree of compression rises, the individual graphite crystals are increasingly oriented within the sheet plane. As a result, the anisotropy of conductivity becomes more pronounced.
The advantages of SIGRATHERM® High Density Graphite Foil are:
0.15 - 1.5 mm
Electrical resistivity ρel
5E-6 Ω·m at 20 °C
Electrical resistivity, transverse ρel,trans
7.999999999999999E-4 Ω·m at 20 °C
Bulk density ρbulk
1.3 - 1.8 g/cm³ at 20 °C
Available in roll or sheet format depending on thickness and density.
Thermal conductivity λ
300 - 500 W/(m·K) at 20 °C
Thermal conductivity, transverse λtrans
5 W/(m·K) at 20 °C
Many heat dissipation applications benefit from the outstanding properties of our SIGRATHERM high density (HD) foils.
This material data has been provided by SGL Carbon.