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Formula: SiO₂
Form: Ball/Sphere
Material: Fused Quartz
CAS Number: 14808-60-7
Commodity: Ceramics
Type: Precision Sphere
Sphericity: 0.625µm
Fused Quartz Balls are high-purity silica-based spherical materials engineered for exceptional thermal stability, low thermal expansion, and outstanding chemical inertness. Manufactured from SiO₂ with purity levels exceeding 99.95%, they maintain stability at temperatures above 1100 °C and resist thermal shock, making them suitable for high-performance thermal insulation and demanding process environments. They find extensive application in aerospace thermal shields, high-temperature furnace linings, and precision instrumentation. Specific technologies benefiting from Fused Quartz Balls include lightweight refractory bricks using fused quartz hollow balls for insulation and high-purity ball forms for semiconductor process equipment. Their precision spherical shape enables uniform packing and consistent thermal performance in high-vacuum or corrosive gas environments. In research and innovation, these balls are critical for developing lightweight, high-temperature materials with stable chemical and physical properties, reinforcing their value in advanced manufacturing and industrial science.
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Tolerances

Ball/Sphere
Diameter Standard ±5%
Diameter Precision See Item

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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