Custom Size Corning 7979 IR Grade Quartz Blanks
- Product Item : HYRD-Q003
- Category： Quartz Blanks
- Material: Corning 7979 IR Grade Quartz
- Silica purity: 99.99%
- Dimension: Custom or Standard
- Minimum Order Quantity: Negotiable
Custom Size Corning 7979 IR Grade Quartz Blanks
Corning 7979 is high purity non-crystalline silica glass with excellent optical qualities produced by Corning Company. The material is with extraordinary low refractive index variations leading to state-of-the-art homogeneity values, lowest birefringence values, large size capabilities, exceptional transmittance from the deep ultraviolet through the infrared region, and an ultra-low thermal expansion coefficient.
HPFS® Summary of Key Attributes
|
Attribute |
7979 IR Grade |
7979 Industrial Grade |
|
Visible Transmittance |
* |
* |
|
UV Transmittance |
|
|
|
Infrared Transmittance |
* |
|
|
Homogeneity Certified in Use-Axis: AA, A, C, F (By Size) |
* |
|
|
Inclusion Class: 0, 1, 2, 5 |
* |
|
|
Striae: ISO 10110-4 Class 5 (None) |
* |
|
|
Homogeneity Certified in Off-Axis: AA, A, C, F (By Size) |
* |
|
|
Low Birefringence |
* |
|
|
UV Laser Resistance (data available upon request) |
|
|
|
Economical (No certification of any properties except visible transmission and birefringence. Tooling applications.) |
|
* |
HPFS® Data and Properties
|
|
ISO 10110-1 Inclusion Class |
Homogeneity Grade [ppm]
|
Birefringence Lower specifications available upon request [nm/cm] |
ISO 10110-4 Striae Class
|
Metallic Impurities [ppb] |
OH Content [ppm] |
|
7979 IR Grade |
0, 1, 2
|
AA, A, C, F
|
”≤5 |
5 |
<100 |
<1 |
|
7979 Industrial Grade |
NS |
NS |
≤5 |
NS |
NS |
NS |
Mechanical Properties
|
Unless otherwise stated, all values @ 25 ℃ |
|
|
Elastic (Young’s) Modulus |
73 GPa |
|
Shear Modulus |
31 GPa |
|
Modulus of Rupture, abraded |
52.4 MPa |
|
Bulk Modulus |
35.9 GPa |
|
Poisson’s Ratio |
0.16 |
|
Density |
2.20 g/cm3 |
|
Knoop Hardness (100g load) |
522 kg/mm2 |
|
Tensile Strength |
54 MPa |
|
Compressive Strength |
1.14 GPa |
Thermal Properties
|
Glass Code: |
7979 |
Viscosity |
|
Softening Point* |
1627 ℃ |
107.6 poises |
|
Annealing Point* |
1180 ℃ |
1013 poises |
|
Strain Point* |
1068 ℃ |
1014.5 poises |
|
Specific Heat 0.770 J/(g K) |
||
|
Thermal Conductivity 1.38 W/(m K) |
||
|
Thermal Diffusivity 0.0075 cm2/s |
||
|
Thermal Expansion** (ppm/C): |
||
|
5 ℃ to 35 ℃ |
0.52 x 10-6 |
|
|
0 ℃ to 200 ℃ |
0.57 x 10-6 |
|
|
-100 ℃ to +200 ℃ |
0.48 x 10-6 |
|
|
ASTM Procedures - *C-598, **E-228 |
||
Broad Spectrum Internal Transmittance
UV Internal Transmittance
