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- 材料晶向:C向/ 任意晶向
优德中文网站光电定制各种尺寸的蓝宝石光学窗口片，蓝宝石光学元件，以及全抛光蓝宝石光学元件。尺寸从0.5mm到300mm，厚度最薄可以到0.2mm。外圆、侧面以及倒角边均可以光学抛光。
蓝宝石窗口/全抛光蓝宝石窗口片
定制各种尺寸的人造蓝宝石晶体光学窗口片，蓝宝石光学元件，以及全抛光蓝宝石光学元件。尺寸从0.5mm到300mm，厚度最薄可以到0.2mm。外圆、侧面以及倒角边均可以光学抛光。
Sapphire (Al2O3) Crystals Windows
● Extreme surface hardness and chemical resistance
●
Transmits wavelength ranging from 0.2 to 5.5μm
Chemically, sapphire is single crystal aluminum oxide (Al2O3) and is useful in
a transmission range from 0.2 - 5.5μm, it is suitable for MWIR 3-5μm thermal imaging applications.
Sapphire Windows are made from single crystal sapphire, they are ideal for
demanding applications because of their extreme surface hardness, high thermal
conductivity, high dielectric constant and resistance to common chemical acids
and alkalis. Sapphire is the second hardest crystal next to diamonds and,
because of their structural strength, sapphire windows can be made much thinner
than other common dielectric windows with improved transmittance.
|
Physical and optical properties |
|
|
Transmission Range |
0.17 to 5.5 μm |
|
Refractive Index |
No 1.75449; Ne 1.74663 at 1.06 μm (1) |
|
Reflection Loss |
14% at 1.06 μm |
|
Absorption Coefficient |
0.3 x 10-3 cm-1 at 2.4 μm (2) |
|
Reststrahlen Peak |
13.5 μm |
|
dn/dT |
13.1 x 10-6 at 0.546 μm (3) |
|
dn/dμ = 0 |
1.5 μm |
|
Density |
3.97 g/cc |
|
Melting Point |
2040°C |
|
Thermal Conductivity |
27.21 W m-1 K-1 at 300K |
|
Thermal Expansion |
5.6 (para) & 5.0 (perp) x 10-6/K * |
|
Hardness |
Knoop 2000 with 2000g indenter |
|
Specific Heat Capacity |
763 J Kg-1 K-1 at 293K (4) |
|
Dielectric Constant |
11.5 (para) 9.4 (perp) at 1MHz |
|
Youngs Modulus (E) |
335 GPa |
|
Shear Modulus (G) |
148.1 GPa |
|
Bulk Modulus (K) |
240 GPa |
|
Elastic Coefficients |
C11=496 C12=164 C13=115 C33=498 C44=148 |
|
Apparent Elastic Limit |
300 MPa (45,000 psi) |
|
Poisson Ratio |
0.25 |
|
Solubility |
98 x 10-6 g/100g water |
|
Molecular Weight |
101.96 |
|
Class/Structure |
Trigonal (hex), R3c |
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