Passivation glass, tungsten sealing glass, Electrically highly insulating with high hydrolytic resistance.
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2.91 g/cm³ at 20 °C
Viscosity 10¹³ dPa.s (ISO 7884-4)
Coefficient of thermal expansionα
4.4E-6 1/K at 20 °C
mean value for 20-300 °C - ISO 7991
Glass transition temperatureTg
Viscosity 10⁷·⁶ dPa.s (ISO 7884-3)
0.9 W/(m·K) at 90 °C
Viscosity 10⁴ dPa.s (ISO 7884-2)
Dielectric constant, 1MHzεr,1MHz
6 [-] at 20 °C
1.58E+9 Ω·m at 250 °C
Loss tangent, 1MHztanδ1,MHz
3.1E-3 [-] at 20 °C
at λ=587.6 nm
Stress optical coefficientk
For power and pin diodes as well as microdiodes, Signal intensifier, detector (other Electrotechnology/Electronics), Sensors
Hydrolytic resistance Class HGB1 (ISO 719) - Acid resistance Class S4 (DIN 12116) - Alkali resistance Class A3 (ISO695)
This material data has been provided by Schott Glass Tubing.