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.
|
|
