SIGRAFINE® isostatic graphites R6500
Description
SIGRAFINE® Isostatic graphite is an ultra-fine grain graphite used for electronic applications where the mechanical properties of other fine grain graphites are inadequate. The term "Isostatic Graphite" stands for isostatically molded graphite. This means that the raw material mixture is compressed into rectangular or round blocks in a so called Cold-Isostatic-Press (CIP). Compared to other technologies such as extrusion or vibration molding, this technology can produce the most isotropic form of artificial graphite. In addition, isostatic graphite generally tends to have the smallest grain sizes of all artificial graphites. Typical properties of the material:
Properties
General
Bulk density
ρbulk1.77 g/cm³ at 23 °C
Grain size
dgrain10 μm
Permeability coefficient
cperm0.25 cm²/s at 23 °C
Porosity
Vvoid14 %
open porosity
Mechanical
Thermal
Ash content
cash5E-4 - 3E-3 % at 23 °C
depending on the code, it can also be less than 5 ppm
Coefficient of thermal expansion
α4.2E-6 1/K at 23 °C
@20-200°C
Thermal conductivity
λ95 W/(m·K) at 20 °C
Electrical
Electrical resistivity
ρel1.4E-5 Ω·m at 23 °C
Chemical properties
Element
Weight %
Comment
-
Balance
1E-4 - 2E-4 %
depending on the code, it can also be less
2E-6 - 1E-5 %
depending on the code, it can also be less
2E-6 - 5E-5 %
depending on the code
2E-6 - 1E-5 %
depending on the code, it can also be less
Technological properties
Processing methods
Isostatically pressed
This material data has been provided by SGL Carbon.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.
