Luoyang Dingming Optical Technology Co.,Ltd.

Sapphire Windows

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Sapphire Windows

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Sapphire

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Product description

Parameters

Because the high quality artificial sapphire crystal material has good light transmittance in the range of 0.20 ~ 5.50μm, the infrared transmittance is almost no change with temperature, and the transmittance of ultraviolet and visible light is also high, so it is often used instead of other optical materials Optical components, through the infrared optical window, and is widely used in infrared and far infrared military equipment, such as: used in night vision infrared and far infrared sight, night vision cameras and other equipment and satellite, space technology instrumentation As well as windows for high power lasers, various optical prisms, optical windows, UV and IR windows and lenses, low temperature experimental observation port, in the maritime aviation with high precision instruments and other aspects of the full application.

Physical Properties

Density	3.98 G/Cm³
Hardness,Mohs	9
Dielectric Constant For 9.37×109Hz	~9.4@300k at A axis ~11.58@ 300K at C axis
Melting Point,℃	2040
Thermal Conductivity,W/M-Kat 313K	45
Thermal Expansion,1/Kat 293K	10-6.℃-1 8.8
Specific Heat Capacity,J(Kg·℃)	0.782
Crystal Class	Hexagonal System
Knoop Hardness,Kg/M㎡	2000
Young'S Modulus,Gpa	380
Shear Modulus,Gpa	145
Bulk Modulus,Gpa	240
A	a=4.785,c=12.991
Poisson'S Ratio	0.27-0.29