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Windows Sapphire |
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Characteristics:
- excellent transmission (diaphanous with wide spectrum – from UV to IR)
- inert and very resistant against aggressive media
- excellent heat conductivity (particularly at kryotemperatures
- also excellent heat resistance and resistance against thermal shocks.
- brilliant resistance against scratching and wear
- good resistance against corrosion and abrasivity
- extreme hardness (behind diamond the most hard technical material)
- excellent electrical characteristics (high electrical resistance, high dielectric coefficient)
The combination from high E-modul, extreme hardness, brilliant optical characteristics and mechanical and chemical resistance offers phenomenal advantages compared against glass or ceramic! |
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Sapphire
windows have good ansmissivity and high permeation ratio when
the wavelength is from 0,2µm; to 5,5 µm
The infrared transmission ratio will not alter with temperature changes.
Therefore, as the best window materials, the sapphire is widely used in
infrared receipts, satellites , missiles, medical equipment, space technology,
instruments and lasers. |
| Products Description Sapphire Windows |
| Hardness |
Mohs 9 |
| Crystalline |
Hexagonal |
| Density |
3.98g/cm³ |
| Melting Point |
2030-2050jæ |
| Thermal Expansion Coefficient |
Parralleleledxis 6.7(10 -6 /jæ)
Vertical Axis 5.0(10 -6 /jæ
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| Young's Modulus |
3.5-3.8(106kg/cm²) |
| Rupture Modulus |
5000-7000 kg/cm² |
| Compressive Strength |
21,000kg/cm² |
| Refractive Index |
Paralleled Axis:1.769
Vertical Axis:1.760 |
| Infrared Transmission Ratio |
86%jj(:Ë=10,000£d=3mm)s |
| Corrosion Proof |
Normal temperature:
acid and alkali proof.
300jæ:can be corroded by HF |
| Specification |
Dia.:2-187mm
Thickness:>0.15mm |
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| Quick-Ohm productes for applications
in the surgical, infrared or ultraviolet optical and safety related industries
used in high temperature or corrosive environment. |
| Dimension (mm) / Material: saphire |
| Ø D |
E |
| 0.80-40.00 |
0.50-20.00 |
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| Tolerances (µm) |
| Ø D |
E |
| 0.80-5.00 |
5.00-40.00 |
0.50-2.00 |
2.00-20.00 |
| ±50 |
±100 |
±50 |
±80 |
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Machining
capabilities and tolerances
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Machining |
Tolerances |
| Flat lapping |
1-70mm Dia. |
Thickness 15 µ
Parallelism 5µ |
| Flat polishing |
0.8-70 mm Dia. |
Flatness 1 µ per 10 mm
Roufhness 0.05 µ |
| Cylindrical polishing |
0.5-8 mm Dia. |
Roughness Ra 0.2 µ |
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| Technical datas |
| Composition |
Al 2O 2 (sapphire) |
| Density |
3.98-3.99 |
| Hardness in Vickes (2000N) |
1900-2100 HV30 |
| Hardness Mohs |
9 |
| Tensile strength |
26 daN/mm² |
| Compressive strenght |
210 daN/mm² |
| Elasticity module |
3.6.10 4 - 104 daN/mm²
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| Melting point |
2050 C° |
| Chemical resistance |
Virtually resistant to all chemical
agents even at high temperature |
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