Borosilicate Glass Rod SCHOTT 8228

Alternative and trade names
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Intermediate sealing glass for sealing to quartz glass and glass 8229 with high resistance to thermal shock.

This material data has been provided by Schott Glass Tubing.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
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





2.15 g/cm³

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PropertyValueTesting StandardComment

Annealing temperature

700.0 °C

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ISO 7884-4

Viscosity 10¹³ dPa·s

Coefficient of thermal expansion

1.3e-06 1/K

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ISO 7991

mean value for 20-300 °C

Glass transition temperature

700 °C

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ISO 7884-8

Softening temperature

1135.0 °C

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ISO 7884-3

Viscosity 10⁷·⁶ dPa·s

Working temperature

1665.0 °C

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ISO 7884-2

Viscosity 10⁴ dPa·s

Chemical properties



0.01 %

max., Lead, Cadmium, Mercury and Hexavalent Chromium

Technological properties

Application areas

For use in electrotechnology (Signal intensifier, Detector) and lighting (Flash lights), Camera- and Video components, Digital projection, Photodynamic Therapy, Beauty and Cosmetics