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Hot pressed polycrystalline magnesium fluoride

Hot pressed polycrystalline magnesium fluoride 

Hot pressed polycrystalline magnesium fluoride is the most cost-effective medium wave infrared optical material at present. It has many advantages, such as high transmittance, low thermal radiation coefficient, high mechanical strength, good thermal shock resistance, chemical corrosion resistance, isotropy, low dielectric constant and so on. It is the preferred infrared window material and millimeter wave (microwave) / infrared dual-mode transmission material for medium wave infrared.

Application fields:

This product is mainly used as window or dome of medium wave infrared tracking, detection, search and other infrared devices, as well as radar wave / infrared dual-mode radome.


Main properties

Transmissive wavelength



≥92% (2mm)


≥3.17 g/cm3

Compression strength


Knoop hardness

≥5.39 Gpa

Bending strength


Poisson ratio


Elasticity modulus


Dielectric constant


Dielectric loss angle tangent


Thermal expansion coefficient

≤1.3×10-5 K-1


Refractive index

1.3816±0.005 (λ=0.5893μm)

1.3524±0.0005 (λ=4μm)


Main specifications:

plate: various specifications with diameter of 330mm and thickness less than 15mm.


Hot pressed magnesium fluoride

Tel: 010-65492620-83018303 Fax: 010-65492620-8007