A.20.1. Sigraflex Foil

PRODUCT

Type

Heat-transfer foil.

Chemical Composition

Expanded natural graphite.

Manufacturer

SGL Carbon Group

          SGL Technik GmbH, Industrial Sealing

          Werner-von-Siemens-strasse 18

          D-86405 Meitingen

          Germany

Tel: +49 08271 83 2276

Fax: +49 08271 83 2419

Email: norbert.berg@sglcarbon.de

www.sglcarbon.com

EXPERIENCE & AVAILABILITY

Development Status

Commercial Product

Cost Range

Low

Lot Reproducibility

Unknown

Space Experience

Fair

GENERAL PROPERTIES (Physical, Mechanical, Thermal, Electrical, Optical)

Nature

Typical Value

Remarks

Specific Gravity

0.7 to 1.3

Manufacturer’s Data, @ 20°C

Thermal Expansion Coefficient:

 

 

          In-plane

~ 1 x 10-6 °C-1 (specific gravity 1.2)

Manufacturer’s Data, @ 20°C

          Perpendicular

~ 30 x 10-6 °C-1 (specific gravity 1.2)

Manufacturer’s Data, @ 20°C

Emissivity

0.47

Manufacturer’s Data, @ 20°C

Volume Resistivity

 

 

          In-plane

~ 8 x 10-6 W m

Manufacturer’s Data, @ 20°C

          Perpendicular

~ 650 x 10-6  W m

Manufacturer’s Data, @ 20°C

PROPERTIES RELEVANT TO SPACE USE

Nature

Typical Value

Type of Test

Outgassing

TML = 0.92%, RML = 0.88%, CVCM = 0.01%

ECSS-Q-70-02

SPECIAL RECOMMENDATIONS

·          This material may be a source of stains and particle contamination.