Materials: Zinc Sulfide MultiSpectral

Zinc Sulfide MultiSpectral (ZnS MS)

ZnS MultiSpectral is II-VI Infrared’s zinc sulfide material treated by a hot isostatic press (HIP) process. Under intense heat and pressure, defects within the crystalline lattice are virtually eliminated, leaving a water-clear material with minimal scatter and high transmission characteristics from 0.4 to 12 microns. This material is particularly well suited for high-performance common aperture systems that must perform across a broad wavelength spectrum.

II-VI Infrared’s extensive capabilities, equipment, and experience enable us to offer ZnS MS material to exacting specifications of dimensional shape and tolerances. ZnS MS material is also available in random sizes and shapes for use as evaporative source material.

Material Properties

Optical Properties

Bulk Absorption Coefficient @ 10.6µm

<= 0.20/cm

Temperature Change of Refractive Index @ 0.6328µm

54 x 10-6/°C

Refractive Index Inhomogeneity @ 0.6328µm

< 20 x 10-6

Thermal Properties

Thermal Conductivity @ 20° C

0.27 W/cm/°C

Specific Heat

0.527 J/g/°C

Linear Expansion Coefficient @ 20° C

6.5 x10-6/°C

Mechanical Properties

Young’s Modulus

85.5 GPa (12.4 x 106 psi)

Rupture Modulus

68.9 MPa (10,000 psi)

Knoop Hardness

210-240 kg/mm2

Density

4.09 g/cm3

Poisson’s Ratio

0.27


Wavelength
(µm)

Index

Wavelength
(µm)

Index

0.4047

2.54515

1.1287

2.28485

0.4358

2.48918

1.5296

2.27191

0.4678

2.44915

2.0581

2.26442

0.4800

2.43691

3.000

2.25772

0.5086

2.41279

3.500

2.25498

0.5461

2.38838

4.000

2.25231

0.5876

2.36789

4.500

2.24955

0.6438

2.34731

5.000

2.24661

0.6678

2.34033

8.000

2.22334

0.7065

2.33073

9.000

2.21290

0.7800

2.31669

10.000

2.20084

0.7948

2.31438

11.250

2.18317

0.8521

2.30659

12.000

2.17101

0.9843

2.30183

13.000

2.15252

1.0140

2.29165