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ZnS MS - Zinc Sulfide MultiSpectral

American Photonics
multispectral zinc sulfide is a form of CVD zinc sulfide that is subjected to a post-deposition hot isostatic process. This removes zinc hydrides from the crystal lattice, normalizes crystal structure and purifies the material, thus creating a virtually clear substrate with high transmission and minimal scatter from 0.4 to 12µm. When several wavebands and a single crystal are required, multispectral zinc sulfide has become the material of choice.

znsms spec chart image

APC can provide raw or generated blanks to most customer specifications. Circular, square or rectangular geometries are available.

See APC's capabilities with optical fabrication and thin film coatings for more details.

American Photonics offers these raw materials:

Mechanical Properties
Hardness
Knoop, 50gm load (kg mm-2)
160
Vickers, 1kg load (kg mm-2)
150
Flexural Strength ( modulous of rupture)
4 pt. loading (psi)
10 x 103
 
4 pt. loading (MPa)
60
 
Disc Bursting (MPa)
50
Young's modulus (elastic modulus)
(psi)
10.8 x 106
 
(GPa)
74.5
Poisson's ratio
0.28

Optical Properties
10% transmission limits (t=6mm)
0.37-14µm
Index of refraction inhomogeneity (∆ n/n)
(ppm @ 0.6328µm)
<20
Thermo-optic coefficient, dn/dT(298-358K)
(K-1 @ 0.6328µm)
5.43 X 10-5
 
(K-1 @ 1.15µm)
4.21 X 10-5
 
(K-1 @ 3.39µm)
3.87 X 10-5
Bulk Absorpbtion
(cm-1 @ 10.6µm)
2.0 X 10-1


Physical Properties
Crystal structure
Cubic
Grain size (diameter)
20-35µm
Density (g cm-3@298K)
4.09
Resistivity (Ωcm)
>1013
Chemical Purity (%)
99.9996
Thermal Properties
Coefficient of Thermal Expansion
(K-1 @ 273 K)
6.3 X 10-6
 
(K-1 @ 373 K)
7.0 X 10-6
 
(K-1 @ 473 K)
7.5 X 10-6
 
(K-1 @ 208-573 K)
6.3 X 10-6
Thermal Conductivity
(JK-1m-1s-1 @ 298 K)
27.2
Heat Capacity
(Jg-1K @ 273 K)
0.515
 
(Jg-1K @ 323 K)
0.527
 
(Jg-1K @ 373 K)
0.527
Thermal Diffusivity (m2s-1)
1.3 X 10-5