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Flexible Graphite Carbon Foil (Light Tight)

Grade: Flexible Graphite
Formula: C
Form: Foil (Light Tight)
Material: Carbon
CAS Number: 7440-44-0
Commodity: Metals
Purity: 99.8%
Light Tight: Light Tight
Goodfellow's flexible graphite carbon foil (light tight) is a carbon-based foil product notable for its flexibility and opacity to light. With a density of just 1.1 g/cm3, this lightweight foil can readily conform to curved surfaces while completely blocking the transmission of light. Key applications of this versatile foil include its use as a high-temperature gasket material in optical devices and as an electromagnetic shielding material in electronic enclosures where both flexibility and light-blocking ability are required. As part of Goodfellow's extensive range of foil products, this graphite foil offers unique combinations of physical, electrical and optical properties.
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Material Properties for Metals

Atomic Properties
Element Value
Atomic number 6
Crystal structure Hexagonal/Diamond
Electronic structure He 2s² 2p²
Valences shown 2, 3, 4
Atomic weight( amu ) 12.011
Thermal neutron absorption cross-section( Barns ) 0.0034
Photo-electric work function( eV ) 4.8
Natural isotope distribution( Mass No./% ) 12/ 98.89
Natural isotope distribution( Mass No./% ) 13/ 1.11
Atomic radius - Goldschmidt( nm ) 0.077
Ionisation potential( No./eV ) 6/ 490
Ionisation potential( No./eV ) 4/ 64.5
Ionisation potential( No./eV ) 1/ 11.26
Ionisation potential( No./eV ) 3/ 47.9
Ionisation potential( No./eV ) 2/ 24.38
Ionisation potential( No./eV ) 5/ 392
Mechanical Properties
Element Value
Hardness - Mohs 0.5-1
Hardness - Mohs 10
Material condition Diamond
Material condition Graphite
Bulk modulus( GPa ) 33
Bulk modulus( GPa ) 542
Tensile modulus( GPa ) 4.8
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 1375@0@0°C
Thermal emf against Pt (cold 0C - hot 100C)( mV ) 0.7
Physical Properties
Element Value
Boiling point( C ) 5000
Density( gcm⁻³ ) 2.25@20°C
Thermal Properties
Element Value
Melting point( C ) 3650
Specific heat( J K⁻¹ kg⁻¹ ) 712@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 80-240@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 0.6-4.3@0-100°C

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