Accuflect™
IR Infrared Reflectors
Accuflect™
IR is
a highly diffuse and low loss reflector of near infrared and mid
infrared radiation. The diffuse reflecting Accuflect™ IR
offers
alternatives to the metallic specular reflectors and their shortcomings
often found in infrared heating applications. Some notable
characteristics of the Accuflect™ IR ceramic reflector material include:
- Diffuse
reflectance creates a uniformly illuminated area
- Accuflect™
IR can be applied as flat panels to act as a planar source or it can be
shaped to provide a more concentrated area of illumination
- Accuflect™
IR is a refractory material capable of long term use at 1200°C--well
above the use temperature of metal reflectors
- The
refractoriness eliminates the need to actively cool the reflector
surfaces
- Radiosity
from the warm reflector surfaces improves heating efficiency and has a
recuperator effect on the high temperature emitters
- Accuflect™
IR has optimal reflectance in the .76 micron to 2 micron NIR
wavelengths characteristic of high energy and high watt density
emitters operating above 1000°C
- Accuflect™
IR is an electrical insulator
Accuflect™
has a fine particle size. Its microstructure results in a
short
mean free path length for the infrared photons refracting and
reflecting within the material so sections as thin as 3 mm are fully
effective reflectors.
where:
Source:
Heraeus
t=thickness (or total path length)
l*=photon mean free path length
The
curve shows the percent reflectance versus the ration of thickness to
mean free path length for non absorbing media. This is
typical of
Accuflect™ IR in the shortwave infrared spectrum. ( Notice how the %
reflectance becomes asymptotic to 100% as the total path length to mean
free path length approaches 100:1).
The excellent low loss,
diffuse reflectance of Accuflect™ IR is shown in the following diffuse
reflectance and specular reflectance curves. Total
reflectance
can be obtained by summing the diffuse and specular components at any
wavelength of interest.
Accuflect™ IR is available in sheets as thin as 3 mm and as shaped
components as large as 75 mm square by 450 mm long.
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