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Tel：15215065771
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Hot-pressed polycrystalline magnesium fluoride

1. Brief description:Hot-pressed polycrystalline magnesium fluoride has the advantages of high infrared transmittance, low thermal emissivity, good mechanical properties, and low preparation cost, and is the preferred material for mid-wave infrared imaging.At present, this product is mainly used in infrared point light source equipment, but with the rapid development of infrared imaging technology, it will be widely used in infrared imaging in the future.2. Performance indicators:


Mechanical behavior

Density

3.177 g/cm3

Rockwell hardness

≥571kg/mm2

Flexural strength

110MPa

Fracture toughness

0.998+/-0.005MPa·m1/2

Young's modulus

114.1+/-1.1Pa

Poisson's ratio

0.27/-0.01

Thermal properties

Melting point

1255oC

Coefficient of expansion（20-500℃）

12.884×10-6K-1

Thermal conductivity（56℃）

15.3

Thermal conductivity（108℃）

12.98

Thermal conductivity（179℃）

10.88

Dielectric constant

8.347

Optical properties



Wavelength (microns)

2.5

3.0

3.5

4.0

4.5

5.0

5.5

Refractive index

1.3692

1.3647

1.3594

1.3522

1.3452

1.3342

1.3282

Transmittance

73.8

86.4

91.3

95.1

95.2

71.0

96.8



3. Specifications:(1) Flat plate: Φ10-Φ300mm, various specifications with thickness within 15mm.(2) Fairing: diameter Φ250mm, sag height 90mm, thickness within 13mm of various specifications.