Sapphire Al2O3 Crystal Substrate 2'' 3'' 4'' Double Side Polished for Optical Applications with 0.17-5.5μm Transmission
Price:
Negotiable
MOQ:
5 Pieces
Delivery Time:
1-4 weeks
Brand:
BonTek
Product Description
Product Overview
Sapphire Al₂O₃ Crystal Substrates are precision-engineered optical components available in 2", 3", and 4" diameters with double-side polishing. These substrates leverage single crystal sapphire's exceptional combination of optical, physical, and chemical properties for demanding applications.
Key Applications
- Large aperture windows and viewports for optical systems
- Illuminators for common-aperture systems (visible + IR)
- Optical plates, light guides, and lenses
- High-temperature optical substrates
- Precision mechanical components
- High-pressure lamp bulbs
Optical Properties
| Property | Specification |
|---|---|
| Transmission Range | 0.17 to 5.5 microns |
| Refractive Index | 1.75449 (o) 1.74663 (e) at 1.06 microns |
| Reflection Loss | 11.7% (o-ray) 14.2% (e-ray) at 1.06 microns |
| Index of Absorption | 0.3 × 10⁻³ cm⁻¹ at 2.4 microns |
| dN/dT | 13.7 × 10⁻⁶ at 5.4 microns |
| dn/dm = 0 | 1.5 microns |
Physical Properties
| Property | Specification |
|---|---|
| Density | 3.97 g/cm³ |
| Melting Point | 2040°C |
| Thermal Conductivity | 27.21 W/(m × K) at 300 K |
| Thermal Expansion | 5.6 × 10⁻⁶/K (parallel C-axis) & 5.0 × 10⁻⁶/K (perpendicular C-axis) |
| Hardness | Knoop 2000 kg/mm² with 2000g indenter |
| Specific Heat Capacity | 419 J/(kg × K) |
| Dielectric Constant | 11.5 (parallel C-axis) 9.4 (perpendicular C-axis) at 1MHz |
| Young's Modulus | 335 GPa |
| Shear Modulus | 148.1 GPa |
| Bulk Modulus | 240 GPa |
| Apparent Elastic Limit | 275 MPa (40,000 psi) |
| Poisson Ratio | 0.25 |
Quality Acceptance Check
Important Handling Instructions
- Products are fragile and shipped with reinforced packaging and fragile labels
- Inspect outer carton condition upon delivery and photograph before opening
- Open vacuum packaging only in clean room environments during application
- If damage is detected during transit, photograph/video immediately and contact us without removing from packaging
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Hangzhou Freqcontrol Electronic Technology Ltd.
Location
Room 1106, CIBC, No.198 Wuxing Rd, Hangzhou, P.R.China
Contact Person
Xu