Magnesium fluoride MgF2 crystal substrate

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  • item no :

    MgF2
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    1
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    In Stock
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product details

Magnesium fluoride MgF2 crystal substrate


Magnesium fluoride, MgF2 crystal belongs to tetragonal system, melting point is 1255 °C, high hardness, good mechanical properties, stable chemical properties, not easy to deliquesce and corrode. MgF2 main feature in optical performance is that it has a high transmittance in the vacuum ultraviolet region (more than 80% transmittance at 170 nm), and it is widely used in optical fiber communication, military industry and various optical components.
 
Magnesium fluoride (MgF2) crystal is suitable for windows and focusing mirrors of deep ultraviolet and excimer lasers. Because MgF2 is a tetragonal birefringent crystal, it is widely used in optical components such as optical fiber communication and wave plates.



 

The main performance parameters

Crystal Structure

Tetragonal system

Lattice Constant

a=4.64Å; c=3.06Å 

Melting Point

1255℃

Density

3.18 g/cm3

Growth method

Bridgeman, Czochralski method

Mohs Hardness

4

Refractive Index

no=1.3777; ne=1.3895

Transmission Band

0.12-8.5μm

Specific heat capacity

1003 J Kg/mK

Color deviation Hf-Hc

0.00455

Temperature coefficient
(dh/dt x 10-6)

10.6 @0.8 M

Dielectric constant

4.87(para) 5.54(perp) at 1MHz

Thermal Conductivity:

21(para) 33.6(perp) W/m.K at 300K

Thermal Expansion Coefficient (/℃)

13.7(para) 8.9(perp)x 10-6 /℃┴C 

Cleavage Plane

<110>

MgF2 application

Infrared window, prism, lens

Packing

class-100 clean bag, in class-1000 clean room

 

Standard Specification
Product Name Orientation Standard Size Thickness Polishing  
MgF2 single crystal substrate <001> ±0.5°
<100> ±0.5°
<110> ±0.5°
<111> ±0.5°
Or other off-angle
10x10mm
10x5mm
5x5mm
φ1" x 0.5mm
φ2" x 0.5mm
φ2" x 1.0mm
Or others
0.1mm
0.2mm
0.5mm
1.0mm
2.0mm
5.0mm
Or others
Fine ground
Single side polished
Double side polished

Roughness: Ra<5A(0.5nm)
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MgF2 substrate

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