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	PRODUCT DATA of Fused Silica

Material

Fused Silica

Product Datasheet

fused silica quartz

Chemical Composition

SiO2

	PHYSICAL PROPERTIES

Specific Gravity

2.2

	ELASTIC PROPERTIES

Tensile Modulus

72.4 GPa

Shear Modulus

30 to 31 GPa

Poisson Ratio

0.17

	MECHANICAL PROPERTIES

Ultimate Tensile Strength

48.3 MPa

Fracture Toughness (KIc)

1.2 MPa.m^1/2

Hardness

4.9 to 5 Mohs

	ELECTRICAL PROPERTIES

Dielectric Constant

3.8

Dielectric Strength

50 kV/mm

	THERMAL PROPERTIES

Temperature Range

600 °C(maximum)

Thermal Conductivity

1.4 W/m.K

Thermal Expansion Coefficient

0.6 μstrain/°C

Specific Heat

0.67

	OPTICAL PROPERTIES

Refractive Index

1.46