General Aluminosilicate Glass

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Description

Aluminosilicate glass combines high chemical resistance with high operating temperatures. However, it is more difficult to manufacture compared to borosilicate glass.

Properties

General

Density ρ

2.4 - 2.7 g/cm³ at 20 °C

Mechanical

Elastic modulus E

70 - 80 GPa at 20 °C

Hardness, Knoop, HK2 HK2

500 - 640 [-] at 20 °C

Hardness, Vickers HV

480 - 670 [-] at 20 °C

Poisson's ratio ν

0.2 [-] at 20 °C

Shear modulus G

26 - 31.7 GPa at 20 °C

Thermal

Annealing temperature Tanneal

610 - 800 °C

Coefficient of thermal expansion α

3.38E-6 - 9.8E-6 1/K at 300 °C

Glass transition temperature Tg

620 - 790 °C

Thermal conductivity λ

0.91 - 1.1 W/(m·K) at 20 °C

Vicat softening temperature Tsoft

820 - 1010 °C

Electrical

Dielectric constant εr

6.1 - 7.7 [-] at 20 °C

at 1MHz

Electrical resistivity ρel

0.13 - 0.14 Ω·m at 20 °C

Loss tangent tanδ

1.5E-3 - 0.01 [-] at 20 °C

at 1MHz

Optical

Refractive index nd

1.49 - 1.55 [-]

This material data has been provided by Matmatch.

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.