Fractal BlackTM Coating

Broadband UV–VIS–LWIR

  • Broadband UV thru LWIR
  • Typical applications: space, infrared imaging, passive-thermal control, instrumentation, cooled IR detector parts
  • Essentially zero outgassing
  • Vacuum and thermal-vacuum cycling qualified
  • Operating temperature range: -269°C to 450°C
  • No particulation
  • Only a few microns thick
  • Compatible with virtually all substrate materials
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Specifications
Adhesion
Metals, glass, ceramics, polymers
Adhesion test (ref ECSS-Q-ST-70-13C)
Coated pieces withstand scotch tape test (3M853 Crystal Clear tape, strength of 13N per 25mm), without any evidence of coating removal.
Outgassing CVCM (%)
0.001
Outgassing RML (%)
0.2
Coating chemical content
Completely inorganic
Surface resistivity
≤2X10^6Ω/□
Cleanability
"Coated pieces withstand cleaning with ethanol, IPA or acetone with no change in optical and technical characteristics. Magic Black™, Metal Velvet™ and Litho Black™ should be cleaned very gently."
Parts shape
3D
Humidity Resistance
MIL-C- 48497A
Certificates
ROHS, REACH, ISO 9001:2015, AS9100
Typical Properties

Fractal black coating reflectance chart

Fractal BlackTM is a high-performance, inorganic coating that is used in space and many other applications. The coating is very thin which makes it an ideal choice for optical sharp corner design. It offers exceptional thermal and optical properties, exhibits essentially zero outgassing, no particulation, and is compatible with almost any substrate material.

Operational wavelengths
VIS-FIR
Coating thickness
5-14µm
Emissivity 3-10µm
> 97
Emissivity 3-30µm
> 88
Working temperature (°C)
-269 to 380
Working temperature (°K)
4 to 653
Weight of coating (mg/cm²)
1.6 - 3.2
Moderate abrasion resistance
(ref MIL-C-48497A)
Additional Details

Fractal BlackTM was thoroughly tested and qualified for thermal cycling, thermal vacuum cycling, cryogenic temperature performance, outgassing, space atomic oxygen, reflectance after environmental exposure, and adherence. Detailed BRDF data is available for VIS. SWIR, MWIR and LWIR.

Fractal BlackTM is in extensive use in many applications such as infrared imaging, passive-thermal control management, instrumentation, and cooled IR detectors/sensors. It is applied in a variety of space programs including among others:

  • ESA/ NASA James Webb Space Telescope (JWST) – NIRSpec
  • ESA Bepi Colombo
  • Meteosat Third Generation (MTG) satellites
  • EnMAP-FSSA satellite
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