Customization: | Available |
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Certification: | CE, ISO, BV |
Application: | Rubber, Plastic, Chemical, Construction, Metallurgy, Ceramic, Casting, Glass, Astronomy, Medicine, Biology, Communication, Milit |
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Glass Code: | Synthetic Fused Silica | Viscosity |
Softening Point* | 1627 ˚C | 107.6 poises |
Annealing Point* | 1180 ˚C | 1013 poises |
Strain Point* | 1068 ˚C | 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 ˚C to 35 ˚C | 0.52 x 10-6 | |
0 ˚C to 200 ˚C | 0.57 x 10-6 | |
-100 ˚C to +200 ˚C | 0.48 x 10-6 | |
ASTM Procedures - *C-598, **E-228 |
Unless otherwise stated, all values @ 25 °C | |
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 |
Grade | 7978 IR Grade |
Inclusion Class | 0, 1, 2 |
Homogeneity Grade | AA, A, C, F |
Birefringence Lower specifications available upon request[nm/cm] |
≤ 5 |
Striae ISO 10110-4 Class | 5 |
Metallic Impurities [ppb] | < 100 |
OH Content [ppm] | < 1 |
Applying Fields: | Application of microlithography Lithography lens, Photomask substrate Deep ultraviolet laser element Optical standard parts Excimer laser optics Lithographic optics Beam transmission element Light guide Laser fusion Application of various aerospace technologies |
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