Dynasil is an authorized distributor of:
- Corning HPFS® 7980
- Corning HPFS® KrF Excimer Grades
- Corning HPFS® ArF Excimer Grades
- Corning HPFS® 7979 IR Grade
- Corning ULE® 7972
- Corning ULE® 7973
- Corning HPFS® 8655 Grade
- Corning TSG Titania Silicate Corning HPFS® Industrial Grade
- Nikon NIFS-S
- Synthetic Fused Silica
Material Safety Data Sheet for Corning HPFS®
Learn More About Corning’s Material Safety Data Sheet for fused silica glass.
Dynasil’s Core Drill List
Learn More About Dynasil Fused Silica’s Standard Core Drill List
Dynasil Fused Silica’s Catalogs of Products and Services
Click here for Dynasil Fused Silica’s current product catalog information.
Click here for Dynasil Fused Silica’s 1986 product catalog information.
Fused Silica Properties
Fused silica glass is a form of non-crystalline silicon dioxide, produced synthetically by the vapor phase hydrolysis of a silicon halide. Fused silica is known as the purest form of glass and has many industrial uses due to its properties.
Mechanical Properties of Synthetic Fused Silica |
|
|---|---|
| Formula | SiO2 |
| Solid State | Amorphous |
| Density (25°) | 2.202 +/- .002 gm/cm |
| Refractive Index (632.8 nm) | 1.457 |
| Useful Optical Transmission Range | 180-2500 nm |
| Water Absorption – Saturation | 0% |
| Poisson’s Ratio | 0.17 |
| Elasticity (Young’s) Modulus (25°C) | 745 x 10³ kg/cm² |
| Shear (Rigidity) Modulus (25°C) | 320 x 10³ kg/cm² |
| Bulk Modulus (25°C) | 420 x 10³ kg/cm² |
| Tensile Strength (25°C) | 600 kg/cm² |
| Compressive Strength (25°C) | 11.3 x 10³ kg/cm² |
| Hardness: | |
| Knoop-KHm (100 gm load) | 600 kg/mm² |
| Moh | 7 |
Sonic Properties of Synthetic Fused Silica |
|
|---|---|
| Velocity of Sound: | |
| Shear Wave | 3.75 x 10³ m/sec |
| Compressional Wave | 5.70 x 10³ m/sec |
| Ultrasonic Velocity (50°C): | |
| Shear Wave | 3.75 x 10³ m/sec |
| Compressional Wave | 5.95 x 10³ m/sec |
| Temperature Coefficient of Ultrasonic Velocity: | |
| Compressional Wave (°C⁻¹) | 81.5 x 10⁻⁶ |
| Sonic Attenuation | > .11 db/mMhz |
| Internal Damping | 1 x 10⁻⁵ |
Chemical Properties of Synthetic Fused Silica |
|
|---|---|
| Resistance: | |
| Acids – Concentrated | Good |
| Acids – Dilute | Good |
| Alkalis | Fair |
| Halogens | Good |
| Metals | Fair |
Electrical Properties of Synthetic Fused Silica |
|
|---|---|
| Dielectric Strength: | |
| 25° C | 300-400kV/cm |
| 500° C | 150-200 kV/cm |
| Dielectric Constant | 3.8 |
Electrical Properties of Synthetic Fused Silica at 25° C |
|||||||||
|---|---|---|---|---|---|---|---|---|---|
| 100 Hz | 1 KHz | 10 KHz | 100 KHz | 1 MHz | 10 MHz | 100 MHz | 8.6 GHz | 24 GHz | |
| Dielectric Constant | 3.826 | 3.826 | 3.826 | 3.826 | 3.826 | 3.826 | 3.826 | 3.824 | 3.82 |
| Loss Tangent | <.000004 | <.000002 | <.000005 | 0.00001 | 0.000015 | 0.00002 | 0.00003 | 0.00012 | 0.00033 |
| Volume Resistivity Log10R, ohm-cm | >15.0 | >14.3 | >12.9 | 11.7 | 10.5 | 9.34 | 8.2 | 5.65 | |
Measurement performed at Laboratory of A.R. Von Hippel, Laboratory for Insulation Research, Massachusetts Institute of Technology, May 1970.
Thermal Properties of Synthetic Fused Silica |
|
|---|---|
| Softening Point | 1600°C +/- 25°C |
| Annealing Point | 1100°C +/- 20°C |
| Strain Point | 1000°C +/- 20°C |
| Use Temperature: | |
| Continuous | 950°C +/- 50°C |
| Limited | 1200°C +/- 50°C |
| Thermal Conductivity (25°C) | 3.3 x 10⁻³ (cal cm)/(cm²sec°C) |
| Average Coefficient of Thermal Expansion: | |
| 20°C to 320°C | 5.5 x 10 cm/cm°C |
| Specific Heat (25°C) | 0.177 cal/gm°C |
| Thermal Diffusivity (25°C) | 8.5 x 10⁻³ |