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High Emissivity Materials

Black Coated Gold for High Emissivity

Hight Emissivity Coated Aluminum Foil

Black Coated Glass for High Emissivity

All substances emit thermal radiation (at temperatures above absolute zero). Nevertheless, for any specific temperature and wavelength the total emitted thermal radiation is determined by the emissivity of the substances surface.

Emissivity of materials is defined as the ratio of the energy radiated from a substance's surface to the energy radiated from an ideal emitter (blackbody emission/ black body radiation) under the same conditions. It is a value between 0 for an ideal reflector and 100% for an ideal emitter.

The surface emissivity can be changed by applying appropriate coating, for example high emissivity black paint and black anodize. Acktar vacuum deposited black coatings (PVD thin films) reach nearly ideal infrared emitter value: 98.5% - blackest material with highest emissivity at the industry for coating thickness of just 5 microns.

% emissivity of materials over wavelength range

coated foils

3-10 microns

3-30 microns

Metal Velvet™

>98.5

>90

Spectral Black™

>97

>85

coating type

Ultra Black™

>98

>93

Fractal Black™

>97

>88

Vacuum Black™

>95

>85

Magic Black™

>93

>75

emissivity measuring instrument

Bruker - FTIR

Devices and Services Emissiometer


Quick Quote - Parts Coating Service


Note: the values are average for above selected wavelength band

Part Dimensions:
Length: mm
Width:    mm
Height:  mm
Upload drawing (if available):
Define Areas to be Coated and or Masked (free from any coating).

(dxf,doc,exl,pdf,txt,png,jpg,jpeg,gif,zip)
Immediate Need Quantity:

Projected Annual Requirements:
Operational Environmental Conditions:
Temperature: °C
Humidity:        
Notes / Additional Requirements



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