Corning® 7980
Description
Corning® 7980 fused silica is a high-purity glass material used for UV transmission, laser optics and precision components requiring low thermal expansion and excellent optical performance.
Attribute | Value |
|---|---|
Process | Precision cutting; grinding; polishing; CNC fabrication; optical coating; cleaning |
Features | UV transmitting; high purity; low CTE; excellent thermal properties; chemical resistance |
Substrate(s) | |
Color | |
Transmission Range (nm) | 185 - 2000 nm |
Refractive Index | 1.4584 |
Sheet Length - Max (mm) | 165.1mm |
Sheet Width - Max (mm) | 165.1mm |
Knoop's Hardness kg/mm² | 522 |
Softening Point °C | 1585°C |
Annealing Point °C | 1042°C |
Strain Point °C | 893°C |
Transformation Temperature (Tg) °C | 1042 |
CTE (Coefficient of thermal expansion) α in 10-6 · K-1 (20°C; 300°C) | 5.7 |
Specific Heat Capacity (Cₚ) kJ/(kg·K) (20–100°C) | 165.1 |
Thermal Conductivity (ʎ) W/(m·K) (90°C) | 1.1 |
Photoelastic Constant (nm/cm/MPA) | 35 |
Can be strengthened? | No |
Advantages
- chemical resistance
- excellent thermal properties
- Excellent UV transmission
- high purity
- Low thermal expansion
Applications
- laser windows
- precision optical plates
- semiconductor optics
- UV optics
Industries
- Defense & Avionics
- Imaging & Sensing
- Photonics & Electro-Optics
- Semiconductor & Micro-Electronics