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Quartz - Fused ( SiO2 )

Material Information

Buy Quartz - Fused on-line

We stock and supply the following standard forms:
Granule Monofilament Powder Rod Sheet Sphere Sputtering Target Tube
Granule Monofilament Powder Rod Sheet Sphere Sputtering Target Tube

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General Description:  

Silicon dioxide occurs naturally as sand or rock and when melted, the resulting product is called Fused Quartz. If the silicon dioxide is synthetically derived, the material is often called Fused Silica. Fused Quartz is very pure, has a high chemical resistance, good thermal shock resistance and is very strong in compression. The low thermal expansion coefficient makes it ideal for mirrors and optical flats. It is used for viewing windows, being transparent to wavelengths from around 0.2 to 3.5 microns, insulators for electronic applications and for semi-conductor manufacturing.

   

Chemical Resistance

Acids - concentrated Good
Acids - dilute Good
Alkalis Fair
Halogens Good
Metals Fair

Electrical Properties

Dielectric constant 3.8
Dielectric strength ( kV mm-1 ) 25-40
Volume resistivity @25C ( Ohmcm ) 1018

Mechanical Properties

Compressive strength ( MPa ) 1100
Hardness - Knoop ( kgf mm-2 ) 820
Hardness - Vickers ( kgf mm-2 ) 1000
Shear strength ( MPa ) 70
Tensile modulus ( GPa ) 72-74

Physical Properties

Apparent porosity ( % ) 0
Density ( g cm-3 ) 2.2
Refractive index 1.46
Useful optical transmission range 180-2500nm
Water absorption - saturation ( % ) 0

Thermal Properties

Coefficient of thermal expansion @20-1000C ( x10-6 K-1 ) 0.54
Melting point ( C ) 1715
Specific heat @25C ( J K-1 kg-1 ) 670-740
Thermal conductivity @20C ( W m-1 K-1 ) 1.46
Upper continuous use temperature ( C ) 1100-1400

Buy Quartz - Fused on-line

We stock and supply the following standard forms:
Granule Monofilament Powder Rod Sheet Sphere Sputtering Target Tube
Granule Monofilament Powder Rod Sheet Sphere Sputtering Target Tube

Choose a form to search our on-line catalogue  

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