Solar Glass 0787
Material properties
1. Optical properties
Optical Properties | Value |
---|---|
Refractive index* ng | 1.5184 |
Refractive index* nF' | 1.5143 |
Refractive index* nF | 1.5138 |
Refractive index* ne | 1.5100 |
Refractive index* nd | 1.5080 |
Refractive index* nD | 1.5080 |
Refractive index* nC' | 1.5059 |
Refractive index* nC | 1.5055 |
Refractive index* n1550 nm | 1.4926 |
Abbe value νe | 60.4 |
Photoelastic constant in (nm/cm)/Mpa | 32.1 |
* Refractive indices: Pretreatment of samples.
Condition as supplied ["as drawn"]
2. Thermal properties
General thermal properties | Unit | Value |
---|---|---|
CTE (Coefficient of thermal expansion) α | in 10-6·K-1 (20 °C; 300 °C) | 8.5 |
Transformation temperature Tg | in °C | 568 |
Viscosities | Viscosity lg ŋ in dPas | Temperature in °C |
---|---|---|
Strain point | 14.5 | 537 |
Annealing point | 13.0 | 568 |
Softening point | 7.6 | 762 |
3. Mechanical properties
Mechanical Properties |
Unit | Value |
---|---|---|
Density ρ | in g/cm³ | 2.51 |
Young's modulus E | in kN/mm² | 70.0 |
Poisson's ratio µ | 0.216 | |
Torsion modulus G | in kN/mm² | 29 |
Knoop hardness | HK 0.1/20 | 470 |
Vickers hardness | HV 0.2/25 | 560 |
4. Chemical properties
Hydrolytic resistance (acc. to DIN ISO 719) | Value |
---|---|
Class | HGB 1 |
Equivalent of alkali per gram glass grains in µg/g | < 31 |
Acid resistance (acc. to DIN 12116) | Value |
---|---|
Class | S 24 |
Half surface weight loss after 6 hours in mg/dm² | 31 |
Alkali resistance (acc. to DIN ISO 695) | Value |
---|---|
Class | A2 |
Surface weight loss after 3 hours in mg/dm² | 142 |
5. Electrical properties
Dielectric constant εr (at ϑ = 25 °C) | Value |
---|---|
at 1 MHz | 7.0 |
at 1 GHz | 6.8 |
at 5 GHz | 6.6 |
Dissipation factor tan δ (at ϑ = 25 °C) |
Value |
---|---|
at 1 MHz | 54 · 10-4 |
at 1 GHz | 82 · 10-4 |
at 5 GHz | 114 · 10-4 |
Electric volume resistivity ρD in Ω·cm direct current |
---|
3 ·1015 ( ϑ = 20 °C) |
6. Transmittance values
Spectral transmittance
Transmittance values
Thickness in mm | Τ400* in % | Τ450* in % | Τ500* in % | Τ600* in % |
---|---|---|---|---|
0.100 | 91.7 | 92.3 | 92.1 |
92.3 |
0.125 | 91.6 | 92.0 | 92.1 | 92.3 |
0.150 | 91.4 | 91.8 | 91.9 | 92.2 |
* Τ(λ) – individual values in %
Edge wavelength λc (Τ = 0.46) at thickness in mm | Wavelength in nm |
---|---|
0.100 | 332 |
0.125 | 334 |
0.150 | 336 |
Τ in % arithmetic mean for the given λ - range at thickness in mm | 200 nm to 300 nm | 600 nm to 300 nm | 450 nm to 1100 nm |
---|---|---|---|
0.100 | 4.9 | 92.4 | 92.4 |
0.125 | 3.2 | 92.3 | 92.4 |
0.150 | 2.0 | 92.2 | 92.2 |
Transmittance values after a solarization treatment**:
Τ in % arithmetic mean for the given λ - range at thickness in mm | 200 nm to 300 nm | 600 nm to 300 nm | 450 nm to 1100 nm |
---|---|---|---|
0.125 | 1.4 | 92.2 | 92.2 |
** the sample is irradiated for 3 hours using a UV - F 400 lamp. The irradiation distance is 14 cm.
Products
SCHOTT® Solar Glass 0787 is available as:
- Cut-to-size substrates
- Unpolished substrates and wafers
To find out more, please see the related products on the overview page.