OST Photonics Al2O3 Crystals Sapphire

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OST Photonics Al2O3 Crystals Sapphire
Al2O3 crystals Sapphire, featuring broad optical transmission from 150-5500nm spanning from UV to MWIR spectrum, and robust mechanical/thermal properties, are excellent for applications involving harsh and variant environments or requiring a broad transparent wavelength range e.g. windows of sensors and detectors, IR applications, etc.. The material's most distinguishing attribute is its unequaled mechanical strength, being the second hardest material after diamond, single sapphire crystals have a Knoop Hardness of 1800-2200, making the windows made from single crystals sapphire resistant in extreme to chemical corrosion and abrasions. Custom sapphire windows might be produced into thin optics without fracturing because of the tight internal covalent bonding of single-crystal sapphire while demonstrating good thermal stabilities due to its high thermal conduction.

Application of Al2O3 Crystals Sapphire

Infrared windows

LED lighting

Semiconductor device

Advantages of Al2O3 Crystals Sapphire

Features Extreme Surface Hardness Chemical Resistance

Transmits Wavelengths Ranging From UV to Mid-Infrared

Thinner and Stronger than Standard Glass Windows

Specifications of Al2O3 Crystals Sapphire

Orientation Random or as requested
Size Upon the customer’s request
Diameter Tolerance 0/-0.1 mm
Thickness Tolerance /-0.1 mm
Aperture 90%
Surface Quality 60/4010/5 S/D
Parallelism 1 arc minute
Chamfer 0.2-0.5mmx45°
Coating Uncoated or upon customer’s request

Properties of Al2O3 Crystals Sapphire

Transmission Range 0.17 to 5.5 microns
Refractive Index No 1.75449; Ne 1.74663 at 1.06 micron
Refractive Loss 14% at 1.06 micron
Absorption Coefficient 0.3 x 10^-3 cm-1 at 2.4 ?m
Reststrahlen Peak 13.5 ?m
dn/dT 13.1 x 10^-6 at 0.546 ?m
dn/d? 0 1.5 ?m
Crystal/Class Structure Trigonal hex, R3c
Molecular Weight 101.96
Cleavage Plane 1011, 1012, imperfect
Density 3.97 g/cc
Melting Point 2040°C
Hardness Knoop 2000 with 2000g indenter
Youngs Modulus 335 GPa
Shear Modulus 148.1 GPa
Bulk  Modulus 240 GPa
Poisson Ratio 0.25
Elastic Limit 300Mpa 45.000psi
Thermal Conductivity 27.21 W m-1 K-1 at 300K
Specific Heat Capacity 763 J Kg-1K-1 at 293K 4
Dielectric Constant 11.5 para 9.4 perp at 1MHz
Elastic Coefficients C11496 C12164 C13115 C33498 C44148
Solubility 98 x 10^-6 g/100g water.

Basic Information

About Us

Jiaxing AOSITE Photonics Technology Co.,Ltd. hereinafter referred to as “OST Photonics” is a high-technology company specialized in manufacturing and developing various of crystal material products. With more than twenty years experience, OST Photonics is committed to becoming the most professional manufacturer and supplier in the world. Our main products are as follows:• Scintillation crystal, encapsulated scintillator, pixellated array and scintillation detector for nuclear radiation detection.• Laser crystals, optics and components for laser system and applications.• IR windows and OEM optics for thermal imaging cameras and applications.• SAW/optical grade LiNbO3, LiTaO3, Quartz wafers and all types of crystal substrates for industrial and research applications.Our products are widely used in the laser systems, thermal imaging cameras, medical imaging systems, nuclear detection instruments, medical and biological equipments, defense and security, scientific research and aerospace.In the past few years, we have been cooperated closely with many scientific research centers, laboratories, universities and instrument manufacturers around the world, all our customers are satisfied with our products and services.Here at OST Photonics we value specialty, accountability and innovation. Our mission is to be your dependable partner to help you in growth.

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