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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） |
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|
Average absorption coefficient |
（2.5～5.5）×10-2 (3～5μm) （1～4.7）×10-2 (7.5～10.5μm) |
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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
