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KBr substrate

KBr substrate

 

Potassium Bromide(KBr) optical window

Crystal structure

Cubic

Growth method

Crystallization method

Lattice constant

a=5.596Å    

Density

2.75(g/cm3)

Mohs hardness

2

Melting point

730℃

Transmission band

0.23~25μm

Refractive index

1.49025, 1.525 at 10μm

Thermal Conductivity

4.816 W/mK @ 319K

Thermal expansion coefficient

43×10-6 /°K @ 300K

Dielectric constant

4.9 at 1MHz

Young's modulus

26.8 GPa

Deliquescence

NaCl is a water-soluble crystal, it is easily deliquescent and can not be polished by CMP

Packing

100 grade clean bag, 1000 grade clean room

 

Standard Specification
Product Name Orientation Standard Size Thickness Polishing  
KBr substrate (100) <±2.0°
(110) <±2.0°
(111) <±2.0°

Or other off-angle
 
10x10x1.0mm
10x5mm
5x5mm
20x20mm
50x50mm
φ1" x 1.0mm
φ2" x 3.0mm
φ4" x 5.0mm
Or others
1.0mm
2.0mm
3.0mm
5.0mm
10.0mm
Or others
Fine ground
Single side polished
Double side polished

Surface finish: 60/40 or 80/50

Roughness: Ra<100A(10nm)
Roughness: Ra<50A(5.0nm)
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Potassium bromide, KBr single crystal having a high transmittance and a wide pass band, and widely used as splitting prism, transmission windows and lens in infrared spectrometer, spectrophotometer and Infrared devices.

 

 
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