General Fused Silica Glass

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Description

Fused silica is the glassy and, therefore, isotropic form of quartz.

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.

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Properties

General

PropertyTemperatureValue

Density

23.0 °C

2 - 2.2 g/cm³

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Mechanical

PropertyTemperatureValue

Compressive strength

23.0 °C

1100 - 1130 MPa

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Elastic modulus

23.0 °C

71 - 74 GPa

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Flexural strength

23.0 °C

40 - 100 MPa

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Hardness, Knoop, HK2

23.0 °C

520 - 710 [-]

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Hardness, Vickers

23.0 °C

900 - 1030 [-]

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Poisson's ratio

23.0 °C

0.16 - 0.17 [-]

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Shear modulus

23.0 °C

30 GPa

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Tensile strength

23.0 °C

50 - 60 MPa

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Thermal

PropertyTemperatureValue

Annealing temperature

1040 - 1220 °C

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Coefficient of thermal expansion

600.0 °C

5.4E-7 - 6.4E-7 1/K

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Specific heat capacity

23.0 °C

670 - 750 J/(kg·K)

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Thermal conductivity

23.0 °C

1.1 - 1.4 W/(m·K)

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Thermal diffusivity

23.0 °C

0.75 - 0.85 mm²/s

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Vicat softening temperature

1590 - 1720 °C

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Electrical

PropertyTemperatureValueComment

Dielectric constant

23.0 °C

3.7 - 3.9 [-]

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at 500MHz

Loss factor

23.0 °C

4E-4 - 1E-3 [-]

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Optical

PropertyValue

Abbe number

67.6 - 67.84 [-]

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Refractive index

1.46 [-]

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