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- Contact Person : Mr. Ge Alex
- Company Name : Atom Optics Co., Ltd.
- Tel : 00086-21-39523288
- Fax : 00086-21-39523268
- Address : Shanghai,shanghai,No.1661-14-101 Baojia Road Jiading District Shanghai 201808 of China
- Country/Region : China
- Zip : 201808
Sapphire crystal ingot
Product Detailed
Related Categories:Other Lights & Lighting Products
It has good thermal properties, excellent electrical and dielectric properties and is resistant to chemical attack.
Due to the hardest of the oxide crystals, Sapphire has a combination of optical and physical properties that makes it the best choice for a variety of demanding applications. Sapphire maintains its strength even at high temperatures. It has good thermal properties, excellent electrical and dielectric properties and is resistant to chemical attack. These properties encourage the use of Sapphire in aggressive environments where reliability, optical transmission or strength is required. ATOM supply the sapphire crystal with high quality, low cost. Careful selection of raw materials and strictly quality control at every stage of growth, ensure the best specifications for different application. Large size Sapphire crystals up to 4 in boule is available in ATOM. 1. Basic Properties Crystal Structure: | Hexagonal System |
Lattice: | a=4.785A, c=12.991A |
Density: | 3.98g/cm3 |
Transmission Range | 0.15-5.5µm |
Melting Point: | 2042°C |
Specific Heat: | 0.418W×s/g/k |
Thermal Conductivity: | 25.12W/m/k(@100°C) |
Thermal Shock Resistance: | 790W/m |
Thermal Expansion Coefficient: | 5.8´10-6/K |
dn/dt (@633nm) | 13´10-6/K |
Mohs Hardness: | 9 |
Refractive Index(no): | 1.83(0.26mm), 1.76(0.63mm), 1.58(5.57mm) |
2. Standard Specifications of Epi-ready Sapphire Substrate
Diameter | 50.8+/-0.05, mm | 76.2+/-0.05, mm |
Thickness | 330-430+/-50μ | 380-480+/-50μ |
Orientation | C (0001) +/-0.1o | C (0001) +/-0.1o |
TTV and Bow | <20μ | <25μ |
Front Surface | Epi polished | Epi polished |
Back Side | Lapped or polished | Lapped or polished |
Flatness | <5μ | <5μ |
Roughness (Ra) | <0.5mm | <0.8mm |
Flat Length | 16.0+/-0.5mm | 22.0+/-0.5mm |
Primary Flat Location | A or M +/-0.5 o | A or M +/-0.5 o |
Secondary Flat Location | 90 o ccw to primary | 90 o ccw to primary |
Package | 25 wafer cassette | 25 wafer cassette |
Our as-cut wafer is also available with the following specifications: Φ2, Φ3x 0.65/0.7mm
Other high-precision sapphire widows, AR- or HR-coatings are available upon request. Sapphire boule grown by CZ and TGT method and cut Sapphire blocks is also available. 3. Standard Specifications of Sapphire Windows & MirrorsDiameter: | +0.0, -0.1mm |
Thickness: | ±0.02mm |
Flatness: | better than l per 10mm (@633nm) |
Parallelism: | better than 3 |
Perpendicularity: | better than 5 |
Scratch-Dig: | 20-30 per MIL-O-13830A |
Wavefront Distortion: | Less than l/2 per inch (l@1064nm) |
Sapphire crystal ingot