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Hot pressed polycrystalline zinc sulfide

Hot pressed polycrystalline zinc sulfide 

Hot pressed polycrystalline zinc sulfide is made from high purity zinc sulfide under high temperature and vacuum. It is a kind of medium wave and long wave dual band infrared transmission material. It has excellent infrared optical properties, mechanical properties resistant to impact and overload, and good thermal properties. It can be pressed into various curvature radius spheres and various sizes of flat plates, and is widely used in infrared optical systems.

Main properties:

 

Density

4.089 g/cm3

Melting point

1830 oC

Rockwell hardness

210~240 kg/mm2

Expansion coefficient

7.4×10-6K-1(23~600oC)

Bending strength

90~100MPa

Thermal conductivity

0.17W/m·K

Fracture toughness

0.699MPa·m1/2

Dielectric constant

8.347

Young's Modulus

74.5GPa

Refractive index

η10=2.1986

Poisson's Ratio

0.29

Stress birefringence

<200nm/cm

Transmittance

≥69%(3~5μm)(6mm thick)

≥70%(7.5~10.5μm)(6mm thick)

Average absorption coefficient

(2.5~5.5)×10-2  (3~5μm)

(1~4.7)×10-2  (7.5~10.5μm)

 

Main specifications:

Plate:Φ 10~Φ 330mm, various specifications with thickness less than 15mm.

Dome:various specifications with diameter of Φ 270mm and thickness of less than 13mm.

 

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