|
| |
KU-1
ULTRAVIOLET GRADE SYNTHETIC FUSED SILICA
Transmittance (10
mm thickness, reflective losses included)
| Refractive Index |
nf
(486nm) = 1.4631; nd
(588nm) = 1.4585; nc
(656nm) = 1.4564 |
| Birefringence Constant |
3.54 (nm/cm)/(kg/cm2) |
| Abbe Constant |
67.8 |
| Bubbles/Inclusions |
none |
| Fluorescence |
Virtually fluorescence free |
| Impurity Content |
Total metallic impurities: approximately 5
ppm |
| OH- Content |
> 1000 ppm |
| Density |
2.201 g/cm3 |
| Coefficient of Expansion |
0.55 x 10-6
/oC |
| Softening Point |
1600oC (2912oF) |
| Annealing Point |
1120oC (2048oF) |
| Strain Point |
1025oC (1877oF) |
| Max. Service Temperature |
950oC (1742oF) -
continuous, 1200oC (2192oF) - limited time |
| Dielectric Strength |
250-400 kV/cm at 20oC |
| Chemical Stability |
High resistance to water and acids (except
hydrofluoric). |
| Young's Modulus |
73 GPa at 25oC |
| Shear Modulus |
31 GPa at 25oC |
| Rupture Modulus |
50 MPa at 25oC |
| Bulk Modulus |
36.9 GPa at 25oC |
| Poisson Ratio |
0.17 at 25oC |
| Knoop Hardness |
500 kg/mm2 |
| Compressive Strength |
1.1 GPa |
| Tensile Strength |
50 MPa |
|
