Borosilicate Glass SCHOTT 8800R

Alternative and trade names
SCHOTT 8800R
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Description

Glass tubes for sealing to kovar. High transmittance and chemically highly resistance

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.

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Properties

General

PropertyValue

Density

2.34 g/cm³

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Mechanical

PropertyValue

Elastic modulus

73 GPa

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Thermal

PropertyValueTesting StandardComment

Annealing temperature

570.0 °C

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ISO 7884-4

Viscosity 10¹³ dPa·s

Coefficient of thermal expansion

5.5e-06 1/K

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ISO 7991

mean value for 20-300 °C

Glass transition temperature

565 °C

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ISO 7884-8

Softening temperature

790.0 °C

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ISO 7884-3

Viscosity 10⁷·⁶ dPa·s

Specific electrical resistance temperature

191.0 °C

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For ρ=10⁸ Ω·cm

Working temperature

1175.0 °C

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ISO 7884-2

Viscosity 10⁴ dPa·s

Electrical

PropertyTemperatureValueFrequency

Dielectric constant

5.9 [-]

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1MHz

Electrical resistivity

250 °C

100000 Ω·m

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350 °C

5012 Ω·m

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Loss tangent

0.0143 [-]

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1MHz

Optical

PropertyValueTesting StandardComment

Refractive index

1.5 [-]

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at λ=587.6 nm

Stress optical coefficient

3.3e-06 mm²/N

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DIN 52314

Chemical properties

Property

Other

0.01 %

max., Lead, Cadmium, Mercury and Hexavalent Chromium

Technological properties

Property
Application areas

Renewable energies (Receiver), Fibre Optics

Corrosion properties

Hydrolytic resistance Class HGB1 (ISO 719) - Acid resistance Class S1 (DIN 12116) - Alkali resistance Class A2 (ISO695)