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Sapphire(Al2O3) window

Sapphire(Al2O3) optical window
Material	Single crystal of Sapphire(Al2O3), Purity: >99.995%
Other Names	Sapphire window substrate, Al2O3 window, Sapphire glass window
Crystal structure	Hexagonal
Applicable wave band	0.2μm ~ 5.5μm
Refractive Index (at 300K)	∥C，1.762 @630nm ⊥C，1.770 @630nm
Melting Point	2040℃
Operating temperature	<1700℃
Refractive index	No 1.75449; Ne 1.74663 at 1.06 μm
Absorption coefficient	≤0.0003 /cm at 2.4μm
Thermal Conductivity	46.06 @ 0℃ 25.12 @ 100℃, 12.56 @ 400℃ ( W/(m.K) )
Mohs hardness	9
Dielectric constant (*10³-10⁹Hz @25℃)	∥C，11.5 ⊥C，9.3
Thermal expansion coefficient	5.8x10^-6/K
Maximum size	Diameter 220mm (Single crystal) Square 300mm (Single crystal)

Material	Standard Size	Surface quality
Sapphire(Al2O3) window	φ12.7mm x 1.0mm φ25.4mm x 3.0mm φ25mm x 1.0mm φ50mm x 3.0mm φ100mm x 0.5mm φ100mm x 1.0mm φ100mm x 5.0mm 10 x 10 x 1.0mm 25.4 x 25.4 x 3.0mm Or others	Polishing: Double side optical-polished or Epi-polished Roughness: Ra<1.5nm or Ra 5~10nm, Ra<0.5nm, Size Tolerance: +/-0.1mm Thickness Tolerance: +/-0.1mm or +/-0.05mm Parallelism: 1 minute, 30 seconds, 5 seconds or higher Surface Finish: 60-40, 40-20, 20-10 (scratch-dig) Surface Figure: 1/2λ, 1/4λ or higher Chamfer: 0.25mm × 45° Coating: Upon requirements

Sapphire (Al2O3) single crystal is an excellent optical window and substrate material. It has high temperature resistance, good thermal conductivity, high hardness, infrared transmission, and good chemical stability. Sapphire (Al2O3) window has high transmittance in the Ultraviolet, Visible and Infrared band, the transmission band range is 0.2-5.5um, its operating temperature can resistance at 1700 ℃, high hardness and second only to diamond, and resistance to acid and alkali corrosion.

Sapphire glass windows can be used as optical window lenses, lens protection external lenses, Isolation windows, armored windows, wear-resistant windows / optical components, high temperature and impact resistant optical windows, etc.

We can customize different size and thickness of Sapphire(Al2O3) optical window upon requirements, such as Sapphire(Al2O3) round wafer, Square substrate and Cylinder, or Punch holes and other shapes.

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BIOTAIN CRYSTAL CO., LIMITED
Tel: (+86) 1506 0796 451
Fax: (+86) 0597 2212602
Email: sales@crystal-material.com
Work Time ( GMT +8 ):
9 AM ~ 6 PM, Monday to Friday
Main office: A7, No. 501, Denggaoxi Road, Xipi street, Xinluo District, Longyan, Fujian, China

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Sapphire(Al2O3) window

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