Aluminosilicate Glass SCHOTT NEO1730

Alternative and trade names
SCHOTT NEO1730
Want to keep this datasheet? Save it now in your required format

Description

Alkaline earth neodymium containing, violet colour aluminosilicate glass for high temperature applications in electrical engineering. High resistance to thermal shock, high hydrolytic resistance, for sealing to molybdenum and free from alkali.

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

Properties

General

PropertyTemperatureValue

Density

23.0 °C

2.67 g/cm³

Show Supplier Material materials with Density of 2.67 g/cm³

Thermal

PropertyTemperatureValueComment

Annealing temperature

725 °C

Show Supplier Material materials with Annealing temperature of 725 °C

Viscosity 10¹³ dPa.s (ISO 7884-4)

Coefficient of thermal expansion

23.0 °C

4.5E-6 1/K

Show Supplier Material materials with Coefficient of thermal expansion of 4.5E-6 1/K

mean value for 20-300 °C - ISO 7991

Glass transition temperature

715 °C

Show Supplier Material materials with Glass transition temperature of 715 °C

ISO 7884-8

Softening temperature

935 °C

Show Supplier Material materials with Softening temperature of 935 °C

Viscosity 10⁷·⁶ dPa.s (ISO 7884-3)

Strain temperature

675 °C

Show Supplier Material materials with Strain temperature of 675 °C

Viscosity 10¹⁴·⁵ dPa.s (ISO 7884-7)

Working temperature

1210 °C

Show Supplier Material materials with Working temperature of 1210 °C

Viscosity 10⁴ dPa.s (ISO 7884-2)

Optical

PropertyValueComment

Refractive index

1.55 [-]

Show Supplier Material materials with Refractive index of 1.55 [-]

at λ=587.6 nm

Transmission

37 %

Show Supplier Material materials with Transmission of 37 %

Thickness=1 mm, λ=585 nm

UV transmission

58 %

Show Supplier Material materials with UV transmission of 58 %

Thickness=1 mm, λ=330 nm

Chemical properties

PropertyValueComment

Other

0.01 %

Show Supplier Material materials with Other of 0.01 %

max., Lead, Cadmium, Mercury and Hexavalent Chromium

Technological properties

Property
Application areas

Bulb and exhaust tube for halogen lamps for automotive, household and general lighting.

Corrosion properties

Hydrolytic resistance Class HGB1 (ISO 719) - Acid resistance Class S3 (DIN 12116) - Alkali resistance Class A2 (ISO695)