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Grade 25 Fused Silica Balls

Available Configurations

Properties common to all products in this list

Grade: Grade 25 Composition: SiO₂ Form: Ball/Sphere Material: Fused Silica CAS Number: 7631-86-9 Commodity: Glasses Diameter: 10mm Sphericity: 0.625µm
Grade 25 Fused Silica Balls are defined by their ultra-low thermal expansion, high optical transparency, and excellent resistance to thermal shock, making them indispensable in advanced engineering and optical applications. Their high-purity composition ensures stability under high temperatures and corrosive environments while minimizing contamination risks. These fused silica balls are widely applied in aerospace, optics, semiconductor, and high-vacuum technologies where precision and reliability are paramount. Specific applications include high-precision bearings in aerospace instrumentation, optical components for laser systems, and structural elements in semiconductor fabrication equipment. In research, fused silica balls are central to studies on laser-induced damage, high-purity glass processing, and the design of radiation-resistant optical materials. Their combination of thermal stability, chemical resistance, and optical performance makes them a cornerstone for both cutting-edge scientific exploration and critical industrial technologies.
Starting at $2,690.00 each
No Minimum order Free technical support *Free delivery worldwide

Material Properties

Chemical Resistance
Element Value
Acids - concentrated Good
Acids - dilute Good
Alkalis Fair
Halogens Good
Metals Fair
Magnetic Properties
Element Value
Maximum permeability 365-2500nm
Coercivity - as cast( A m⁻¹ ) 1.46
Remanence ratio( Br/Bs ) 1715
Saturation flux density( T ) 3.8
Physical Properties
Element Value
Apparent porosity( % ) 0
Water absorption - saturation( % ) 0
Density( gcm⁻³ ) 2.18
Thermal Properties
Element Value
Upper continuous use temperature( C ) 900-1200
Specific heat( J K⁻¹ kg⁻¹ ) 750@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 1.2-1.4@20°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 0.5-0.75@20-1000°C
Mechanical Properties
Element Value
Tensile modulus( GPa ) 65-75
Hardness - Vickers( kgf mm⁻² ) 490
Electrical Properties
Element Value
Volume resistivity( Ohmcm ) 10¹⁴@25
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Available Configurations

Properties common to all products in this list

Grade: Grade 25 Composition: SiO₂ Form: Ball/Sphere Material: Fused Silica CAS Number: 7631-86-9 Commodity: Glasses Diameter: 10mm Sphericity: 0.625µm

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Tolerances

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