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We will shortly be offering a large selection of optical components for the Infrared to Ultraviolet regions of the spectrum in our web shop.

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Our optical components are suitable for a wide range of applications. If you are interested in a particular area, please click on the link below.

Sapphire (Al₂O₃)

Properties (Al₂O₃)
Transmission Range	0.2 ... 6 µm
Refractive Index	\|\| C: 1.760 @590 nm	C: 1.769 @590 nm
Reflective Loss	12.98 % @2.9 µm (2 surfaces)
Reststrahlen	13.5 µm
Density	3.99 g/cm³
Melting Point	2050 °C
Molecular Weight	101.9613
Thermal_Conductivity	46.06 W/(m·K) @0°C	25.12 W/(m·K) @100°C	12.56 W/(m·K) @400°C
Specific Heat	764 J/(kg·K) @20°C	1224 J/(kg·K) @1000°C
Thermal Expansion	\|\| C: 6.2 · 10^-6 / K	C: 5.4 · 10^-6 / K
Hardness (Mohs)	\|\| C: 2200	C: 1800
Young`s Modulus	345 - 460 GPa
Shear Modulus	145 GPa
Bulk Modulus	250 GPa
Rupture Modulus	350...690 MPa
Elastic Coefficient	C₁₁= 496.8 GPa	C₁₂= 163.6 GPa	C₃₃= 498.1 C₄₄= 147.4 GPa
Dielectric Constant	\|\| C: 11.58	C: 9.39
Solubility in Water	none
Type of Material	single crystal, synthetic
Crystal Structure	hexagonal rhombic	a = 4.785 Å, c = 12.991 Å
Cleavage Planes	no cleavage
Standard diameter	max. 210 mm
Application	spectroscopy, vacuum windows
Remarks	IR and UV transmission

Transmission spectrum

Transmission spectrum-2

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Material

Please click on the link below for more information about our materials or choose from the transmission curve. Here you can select the correct material for your spectral range. Please click on the link on the left.

This symbol denotes crystal grown in-house.