Sealing glasses in general with 28% PbO, electrically highly insulating and highly x-ray absorbing.
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3.01 g/cm³ at 20 °C
Viscosity 10¹³ dPa.s (ISO 7884-4)
Coefficient of thermal expansionα
9.1E-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)
Specific electrical resistance temperatureTk
For ρ = 10⁸ Ω·cm
0.9 W/(m·K) at 90 °C
Viscosity 10⁴ dPa.s (ISO 7884-2)
Dielectric constant, 1MHzεr,1MHz
6.6 [-] at 20 °C
3.98E+7 Ω·m at 250 °C
Loss tangent, 1MHztanδ1,MHz
1.1E-3 [-] at 20 °C
at λ=587.6 nm
Stress optical coefficientk
General electrotechnical application and electrotechnology (Signal intensifier, Detector and (fibre-) optics), Endoscopy.
Hydrolytic resistance Class HGB3 (ISO 719) - Acid resistance Class S2 (DIN 12116) - Alkali resistance Class A3 (ISO695)
This material data has been provided by Schott Glass Tubing.