Zinc Sulfide / Cleartran

Product catalog summary

Overview
CVD Zinc Sulfide® and Cleartran® are materials used for infrared windows, domes, and optical elements. They are known for their high fracture strength, hardness, and suitability for military applications requiring mechanical resistance.

Properties

CVD Zinc Sulfide®: A cost-effective alternative with high mechanical resistance.
Cleartran®: A modified form of CVD Zinc Sulfide® with enhanced optical properties due to a post-deposition hot isostatic process.

Mechanical Properties

Hardness: Knoop (200-235 kg mm^-2), Vickers (230 kg mm^-2).
Flexural Strength: 103 MPa.
Fracture Toughness: 0.8 MPa m^1/2.

Optical Properties

Transmission Range: 1.0µm – 14µm for CVD Zinc Sulfide® and 0.37µm – 14µm for Cleartran®.
Index of Refraction Inhomogeneity: <100ppm for CVD Zinc Sulfide® and <20ppm for Cleartran®.

Thermal Properties

Coefficient of Thermal Expansion: 6.6 x 10^-6 K^-1 at 273K.
Thermal Conductivity: 16.7 JK^-1m^-1s^-1 at 298K.

Applications
These materials are suitable for multi-spectral applications requiring a single aperture for several wavebands due to their broad transmission range and high optical quality.

Contact Information
For inquiries, contact local sales representatives or distributors in North America, the United Kingdom, Japan, France, Israel, and Germany.

Catalog excerpts

CVD Zinc Sulfide® | Cleartran® VIS/IR applications

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CVD Zinc Sulfide® | Cleartran® CVD Ceramics‘ chemically vapor deposited CVD Zinc Sulfide® is the low cost alternative for infrared windows, domes and optical elements. With a fracture strength double that of zinc selenide and high hardness, zinc sulfide has been used successfully in many military applications requiring mechanical resistance to hostile environments. Cleartran® is a form of CVD Zinc Sulfide® material that is modified by a post-deposition hot isostatic process. This process removes zinc hydrides from the crystal lattice, normalizes crystal structure and purifies the material, all...

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Properties of CVD Zinc Sulfide® and Cleartran® Zinc Sulfide Index of refraction inhomogeneity (Dn/n) Crystal structure Mechanical properties Hardness: Knoop, 50g load [kg mm-2] Vickers, 1kg load [kg mm-2] Flexural strength (modulus of rupture) 4pt. loading [psi] 15 x 10 3 4pt. loading [MPa] 103 Disc bursting [MPa] 84 Grain size Fracture toughness (critical stress intensity factor, K IC values) [MPa m, Vickers, 1kg] 0.8 Chemical purity [%] Poisson’s ratio Physical properties Zinc Sulfide

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CVD Ceramics North America CVD Ceramics, Inc. 11911 Advanced Materials Drive New Iberia, LA 70560 USA phone + 1 337 867 4263 Ext. 2238 fax + 1 337 867 4494 [email protected] www.cvdceramics.com For inquiries please contact our local Sales Representative United Kingdom Ms Carolyne Ockendon Hellma UK Ltd. phone + 44 1702 335 266 fax + 44 1702 430 652 [email protected] For inquiries please contact our local Distributor Hellma Materials GmbH Moritz-von-Rohr-StraRe 1 07745 Jena / Germany phone+ 49 3641 2877-0 fax + 49 3641 2877-200 [email protected] www.hellma-materials.com Mr Coby Cohen...

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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