The features are that it is easy to cut, high luminous transmittance, low mobility of alkali ions, high chemical resistance and excellent flatness. The subsequent properties are based primarily upon the measuring results of the very latest standards and measuring methods. Schott Displayglas retains the right to change the data in keeping with the latest technical standards. Non-tolerance numerical values are reference values of an average production quality.
SPECTRAL TRANSMITTANCE
Mechanical Properties
| Density ρ in g/cm3 (annealed at 40°C/h) | 2.51 | Stress Optical Coefficient C in 1.02 . 10-12 m2/N | 3.4 | Young´s Modulus E in kN/mm2 | 72.9 | Torsion Modulus G in kN/mm2 | 30.1 | Knoop Hardness HK100 | 590 |
Thermal Properties
| Viscosity and Corresponding Temperature | ||
| Designation |
Viscosity log η [dPas] |
Temperature θ [°C] |
| Strain Point | 14.5 | 529 |
| Annealing Point | 13.0 | 557 |
| Softening Point | 7.6 | 736 |
| Coefficient of thermal expansion a | ||
| Coefficient of Mean Linear Thermal Expansion α(20-300°C) in 10-6 K-1 (Static Measurement) | 7.2 | |
Thermal Properties
| Hydrolytic resistance acc. To DIN ISO 719 | |
| Hydrolytic class | HGB 1 |
| Equivalent of Alkali (Na2O) per gram of glass grains in ug/g | 20 |
| Acid resistance acc. To DIN 12116 | |
| Acid Class | 2 |
| Half Surface Weight Loss after 6 hours in mg/dm2 | 1.4 |
| Alkali Resistance acc. To DIN ISO 695 | |
| Class | A 2 |
| Surface Weight Loss after 3 hours in mg/dm2 | 88 |
Electrical Properties
| Dielectric Constant (Permittivity) e at 1 MHz | 6.7 |
| Dissipation Factor tan d at 1 MHz | 61 . 10-4 |
| Electric Volume Resistively pD in Ω - cm for alternating Current 50 HZ at the Specified Temperatures | |
| θ = 250 °C | 1.6 . 108 |
| θ = 350 °C | 3.5 . 106 |
Optical Properties
| Refractive Indices | ||
| Pre treatment of Samples | ng | 1.5354 |
| Condition as supplied [´as drawn´] | nF' | 1.5305 |
| nF | 1.5300 | |
| ne | 1.5255 +/- 0.0015 | |
| nd | 1.5231 | |
| nD | 1.5230 | |
| nC' | 1.5209 | |
| nC | 1.5204 | |
| Abbé Value | Ve | 55 |
| Transmittance Data Tλ - Individual Values in % (t = 1.1 mm) | ||
| λ[nm] | Tλ[%] | |
| 380 | 89.8 | |
| 632.8 | 91.8 | |
| 1064 | 92.0 | |
| Edge Wavelength λC (T = 0.46) in nm | 329 | |
| Luminous Transmittance Tsub>vD65 in % (t=1.1 mm) | 912 | |
| t = 1.1 mm | 91.7 ± 0.3 |
WHILE EVERY ATTEMPT HAS BEEN MADE TO VERIFY THE SOURCE OF THE INFORMATION, NO RESPONSIBILITY IS ACCEPTED FOR ACCURACY OF DATA.
