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Conductive Silicone0 pages
Our E Shielding gaskets are constructed from
silicone containing metal powder fillers which
combine to produce high levels of attenuation with
excellent environmental shielding and a high level
of conductivity. Many types of filler, from nickel
graphite to pure silver, are available to suit a wide
range of applications. There are also Fluorosilicone
variants for use in the presence of hydrocarbon
contamination.
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EXSHIELD | Conductive Silicone
E Shielding
Applications:
E SHIELDING PROPERTIES
SERIES
FILLER
The Conductive Silicone Range was originally developed for high
performance shielding mainly for military applications. However, the
introduction of lower cost fillers has now made them accessible to the
commercial sector. They are used where environmental and EMI
screening is required but space constraints or stringent environmental
protection necessitates a small cross section profile, often fitted into a
groove or channel.
Conductively loaded silicone is best used where mating surfaces are
smooth and well machined. They should be mounted to provide
adequate volume for the material to deflect under pressure and should
be compressed by between 8 and 20% of their relaxed height for solid
sections and between 20 and 100% of the height of the hollow centre
for tubular sections. Moulded '0' rings, gasket profiles and sheet
materials all have their own compression characteristics according to
how they are mounted and do not comply with the guidelines above.
Specifications:
EC-Q EC-G EC-J EC-H EC-F EC-C
Test Method Nickel Graphite Silver Glass Silver Aluminium Silver Copper Silver Carbon
Upper Operating Temp. Degrees C +160 +160 +160 +160 +160 +160
Lower Operating Temp. Degrees C ASTMD-1329 -50 -50 -50 -50 -50 -50
Specific Gravity (+/-5%) ASTM D-792 1.99 1.75 2.00 3.02 3.20 1.19
Hardness Shore A (+/-5) ASTM D-2240 60 60 65 60 75 70
Elongation % (min) ASTMD-412 100 80 175 100 100 150
Compression Set % ASTM D-395 30 30 30 30 30 20
Tensile Strength Mpa (min) ASTMD-412 1.00 0.90 0.90 1.00 1.25 5.00
Volume Resistivity ohms/cm (Max) 0.1 0.05 0.008 0.008 0.002 9.00
TYPICAL ATTENUATION (dB)
200 KHz (H-Field)
100 MHz (E-Field)
500 MHz (E-Field)
2 GHz (Plane Wave)
10 GHz (Plane Wave)
MIL-G-83528 MIL285
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