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Formula: SiO₂
Form: Foil/Film/Sheet
Material: Quartz - Fused
CAS Number: 14808-60-7
Commodity: Ceramics
Goodfellow's Fused Quartz Sheet is a high-purity, amorphous silicon dioxide (SiO₂) product known for its exceptional optical and thermal properties. These sheets exhibit very low thermal expansion, excellent thermal shock resistance, and high transmission across a wide range of wavelengths, including ultraviolet. Their chemical inertness and high purity make them ideal for applications requiring minimal contamination and optical clarity. Fused quartz sheets find extensive use in industries such as semiconductor manufacturing, optical instrumentation, and advanced research facilities. They are commonly used as viewports in high-vacuum systems, as substrates for thin film deposition, and as optical windows in UV spectroscopy equipment. In cutting-edge applications, these sheets are utilized in the development of advanced photolithography systems for semiconductor fabrication and in the production of high-performance optical components for space-based telescopes. In research settings, fused quartz sheets play a crucial role in studying light-matter interactions and in developing new optical sensing technologies. Their unique combination of optical, thermal, and chemical properties makes them invaluable in both industrial processes and scientific investigations, particularly in fields pushing the boundaries of optical and semiconductor technologies.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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Tolerances

Foil/Film/Sheet
Thickness ±20%

Material Properties for Ceramics

Chemical Resistance
Element Value
Acids - concentrated Good
Acids - dilute Good
Alkalis Fair
Halogens Good
Metals Fair
Electrical Properties
Element Value
Dielectric constant 3.8
Dielectric strength( kV mm⁻¹ ) 25-40
Volume resistivity( Ohmcm ) 10¹⁸@25
Physical Properties
Element Value
Refractive index 1.46
Useful optical transmission range 180-2500nm
Apparent porosity( % ) 0
Water absorption - saturation( % ) 0
Density( gcm⁻³ ) 2.2
Thermal Properties
Element Value
Melting point( C ) 1715
Upper continuous use temperature( C ) 1100-1400
Specific heat( J K⁻¹ kg⁻¹ ) 670-740@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 1.46@20°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 0.54@20-1000
Mechanical Properties
Element Value
Tensile modulus( GPa ) 72-74
Hardness - Knoop( kgf mm⁻² ) 820
Hardness - Vickers( kgf mm⁻² ) 1000
Shear strength( MPa ) 70
Tensile strength( MPa ) 48
Pultrusions
Element Value
Compressive strength( MPa ) 1100

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