Materials Blocks
Raw Materials
Description
1. 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：
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Density
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4.089 g/cm3
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Melting point
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1830 oC
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Rockwell hardness
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210～240 kg/mm2
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Expansion coefficient
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7.4×10-6K-1(23～600oC)
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Bending strength
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90～100MPa
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Thermal conductivity
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0.17W/m·K
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Fracture toughness
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0.699MPa·m1/2
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Dielectric constant
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8.347
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Young's Modulus
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74.5GPa
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Refractive index
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η10＝2.1986
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Poisson's Ratio
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0.29
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Stress birefringence
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＜200nm/cm
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Transmittance
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≥69％（3～5μm）（6mm thick）
≥70％（7.5～10.5μm）（6mm thick）
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||
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Average absorption coefficient
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（2.5～5.5）×10-2 (3～5μm)
（1～4.7）×10-2 (7.5～10.5μm)
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||
2. Hot pressed polycrystalline magnesium fluoride
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Transmissive wavelength
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3～5μm
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Transmittance
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≥92% (2mm)
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Density
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≥3.17 g/cm3
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Compression strength
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≥300MPa
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Knoop hardness
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≥5.39 Gpa
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Bending strength
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≥100MPa
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Poisson ratio
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0.25-0.36
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Elasticity modulus
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≥110MPa
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Dielectric constant
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5.1
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Dielectric loss angle tangent
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0.001
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Thermal expansion coefficient
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≤1.3×10-5 K-1
(25℃～300℃)
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Refractive index
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1.3816±0.005 (λ=0.5893μm)
1.3524±0.0005 (λ=4μm)
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Main specifications:
plate: various specifications with diameter of 330mm and thickness less than 15mm.CVDZnSChemical vapor deposition zinc sulfide（CVDZnS） is an important infrared window material, which is widely used in infrared devices and instruments such as infrared safety alarm, infrared radiation temperature measurement, infrared medical equipment, resource exploration, weather forecast, agricultural yield estimation, etc. At present, Research institute synthetic crystals can prepare a variety of chemical vapor deposition zinc sulfide products including standard CVDZnS / multispectral ZnS and elemental ZnS.The standard CVDZnS has excellent optical transmission properties in the long wavelength infrared band (8-12µm), good mechanical strength and environmental stability. The plate size is 800mm ×1000mm;Multispectral ZnS is a standard CVD ZnS prepared by hot isostatic pressing process. It has excellent optical transmission performance in the range of visible light to long wave infrared (0.4-14m), and the size of the prepared ZnS is 440mm × 500mm;Elemental ZnS has many advantages, such as wide transmission band (2.5-12m), high infrared transmittance at high temperature, good thermal shock resistance, etc.Three kinds of ZnS transmittance maps
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NO
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properties
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Standard CVDZnS
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Elemental ZnS
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Multispectral ZnS
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1
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transmission band(µm)
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8-12
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2.5-12
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0.35-12
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2
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Transmittance
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>70%
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>72%
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>72%
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3
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Density(g/cm3)
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4.09
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4.09
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4.09
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4
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knoop hardness
(kg/mm2)
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200-235
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>210
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>160
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5
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Bending strength
(MPa)
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103
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106
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68
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6
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Poisson ratio
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0.29
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0.29
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0.28
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7
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Thermal conductivity
(w/(m•k))
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16.7
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16.8
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27.2
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8
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Thermal expansion coefficient(×10-6/K)
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7.7(473K)
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7.2(473K)
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7.0
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Sputtering Targets
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Material and Symbol
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Purity
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Specifications
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Zinc Oxide (ZnO)
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99.99%
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Anti-Reflective Coatings, Multi-Layer Coatings
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High Purity Silica (SiO2) via Vapor Phase
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99.99%
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Multi-Layer Coatings
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Titanium Dioxide (TiO2)
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99.99%
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Anti-Reflective Coatings, Multi-Layer Coatings
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Zirconium Dioxide (ZrO2)
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99.99%
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Anti-Reflective Coatings, Multi-Layer Coatings
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Silicon Monoxide (SiO)
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99.99%
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Anti-Reflective Coatings, Protective Coatings
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Hafnium Dioxide (HfO2)
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99.99%
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UV Near-Infrared Multi-Layer Coatings
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Titanium Monoxide (TiO)
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99.99%
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Anti-Reflective Coatings, Multi-Layer Coatings
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Magnesium Oxide (MgO)
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99.9%
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Multi-Layer Coatings
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Titanium Pentoxide (Ti3O5)
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99.99%
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Anti-Reflective Coatings, Multi-Layer Coatings
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Titanium Sesquioxide (Ti2O3)
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99.99%
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Anti-Reflective Coatings, Multi-Layer Coatings
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Titanium TetrOxide (Ti4O7)
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99.99%
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Anti-Reflective Coatings, Multi-Layer Coatings
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Fluorides
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Material and Symbol
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Purity
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Specifications
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Calcium Fluoride (CaF2, Fluorspar)
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99.99%
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A R Coatings Anti-Reflective Coating
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Ytterbium Fluoride (YbF3)
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99.99%
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Coatings Infrared Coating, Multi-Layer Coating
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Magnesium Fluoride (MgF2)
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99.99%
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Anti-Reflective Coating, Multi-Layer Coating
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Cerium Fluoride (CeF3)
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99.99%
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Anti-Reflective Coating, Multi-Layer Coating
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Neodymium Fluoride (NdF3)
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99.99%
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Protective Coating, Anti-Reflective Coating
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Yttrium Fluoride (YF3)
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99.99%
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I.R Multi-Layers
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Sodium Hexafluoroaluminate (Na3AlF6, Cryolite)
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99.99%
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A R Coatings Anti-Reflective Coating
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Aluminum Fluoride (AlF3)
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99.99%
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Anti-Reflective Coating, Protective Coating
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Other Compounds
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Material and Symbol
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Purity
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Specifications
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Sapphire Crystal (Al2O3)
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Optical Material, Substrate Material
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Optical Elements, Infrared Optical Windows, Substrates...
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SIO2, AL2O3 Mixture
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99.99%
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Multi-Layer Coatings
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Lanthanum Titanate H14La2O7Ti2
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99.99%
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Multi-Layer Coatings, Anti-Reflective Coatings, Filters
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Zinc Sulfide (ZnS)
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99.99%
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I R Coatings, Infrared Coating
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Chromium (Cr) Granules
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99.99%
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R Coatings, Reflective Coating
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Zirconia and Titania Mixture (ZrO2-TiO2)
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99%
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A.R Coatings, Anti-Reflective Coatings
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