Aluminosilicate Glass SCHOTT 8241

Alternative and trade names
SCHOTT 8241

Want to keep this datasheet? Save it now in your required format

Description

Blue colored alkaline earth aluminosilicate glass, free from alkali, defined absorption, high hydrolytic resistance, high resistance to thermal shock and high temperature resistance. For sealing to molybdenum.

This material data has been provided by Schott Glass Tubing.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

See where falls on the material property chart for against in your materials selection and design process. Our Ashby charts are interactive with more technical data upon clicking. Sign up to get access to this premium feature for free.

All categories

Properties

General

Property	Value	Temperature
Density	2.67 g/cm³ Show Supplier Material materials with Density of 2.67 g/cm³ at 20.0 °C	20.0 °C

Mechanical

Property	Value	Temperature
Elastic modulus	83 GPa Show Supplier Material materials with Elastic modulus of 83 GPa at 20.0 °C	20.0 °C
Poisson's ratio	0.23 [-] Show Supplier Material materials with Poisson's ratio of 0.23 [-] at 20.0 °C	20.0 °C

Thermal

Property	Value	Temperature	Comment
Annealing temperature	795 °C Show Supplier Material materials with Annealing temperature of 795 °C		Viscosity 10¹³ dPa.s (ISO 7884-4)
Coefficient of thermal expansion	4.7E-6 1/K Show Supplier Material materials with Coefficient of thermal expansion of 4.7E-6 1/K at 20.0 °C	20.0 °C	mean value for 20-300 °C - ISO 7991
Glass transition temperature	790 °C Show Supplier Material materials with Glass transition temperature of 790 °C		ISO 7884-8
Softening temperature	1005 °C Show Supplier Material materials with Softening temperature of 1005 °C		Viscosity 10⁷·⁶ dPa.s (ISO 7884-3)
Specific electrical resistance temperature	630 °C Show Supplier Material materials with Specific electrical resistance temperature of 630 °C		For ρ = 10⁸ Ω·cm
Thermal conductivity	1.1 W/(m·K) Show Supplier Material materials with Thermal conductivity of 1.1 W/(m·K) at 90.0 °C	90.0 °C
Working temperature	1305 °C Show Supplier Material materials with Working temperature of 1305 °C		Viscosity 10⁴ dPa.s (ISO 7884-2)

Electrical

Property	Value	Temperature
Dielectric constant, 1MHz	6.6 [-] Show Supplier Material materials with Dielectric constant, 1MHz of 6.6 [-] at 20.0 °C	20.0 °C
Electrical resistivity	1.00E+11 Ω·m Show Supplier Material materials with Electrical resistivity of 1.00E+11 Ω·m at 250.0 °C	250.0 °C
	1.00E+9 Ω·m Show Supplier Material materials with Electrical resistivity of 1.00E+9 Ω·m at 350.0 °C	350.0 °C

Loss tangent, 1MHz	1.5E-3 [-] Show Supplier Material materials with Loss tangent, 1MHz of 1.5E-3 [-] at 20.0 °C	20.0 °C

Optical

Property	Value	Comment
Refractive index	1.55 [-] Show Supplier Material materials with Refractive index of 1.55 [-]	at λ=587.6 nm
Stress optical coefficient	2.7E-6 mm²/N Show Supplier Material materials with Stress optical coefficient of 2.7E-6 mm²/N	DIN 52314

Chemical properties

Property
Other	0.01 %	max., Lead, Cadmium, Mercury and Hexavalent Chromium

Technological properties

Property
Application areas	For high temperature applications in electrical engineering. For use in bulb and exhaust tube for halogen lamps for automotive, houshold and general lighting.
Corrosion properties	Hydrolytic resistance Class HGB1 (ISO 719) - Acid resistance Class S2 (DIN 12116) - Alkali resistance Class A2 (ISO695)

Aluminosilicate Glass SCHOTT 8241

Description

Ashby charts

Applications

Materials by this supplier

Use cases

Properties