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Grade 25 Borosilicate Glass Balls

Available Configurations

Properties common to all products in this list

Grade: Grade 25 Composition: SiO₂ 81/ B₂O₃ 13/Na₂O 4 Form: Ball/Sphere Material: Borosilicate Glass Commodity: Glasses Type: Precision Sphere Diameter: 10mm Sphericity: 0.5µm
Grade 25 Borosilicate Glass Balls are defined by their low thermal expansion, high chemical durability, and excellent resistance to thermal shock. Their composition, rich in silica and boron trioxide, ensures stability under extreme temperature fluctuations and aggressive chemical environments. These properties make them highly valuable in aerospace, chemical processing, biomedical, and electronics industries. Specific applications include precision bearings in high-temperature instrumentation, flow control elements in chemical reactors, and components in biomedical diagnostics where chemical inertness is critical. In research, borosilicate glass balls are central to investigations of radiation-resistant materials, immobilization of nuclear waste, and antimicrobial glass surfaces. Their unique balance of thermal stability, corrosion resistance, and optical transparency guarantees continuing importance in both advanced scientific studies and high-performance industrial operations.
Starting at $540.00 each
No Minimum order Free technical support *Free delivery worldwide

Material Properties

Chemical Resistance
Element Value
Acids - concentrated 0
Acids - dilute 0
Alkalis 0
Halogens 0
Metals 0
Electrical Properties
Element Value
Dielectric constant 0
Dielectric strength( kV mm⁻¹ ) 0
Volume resistivity( Ohmcm ) 0
Mechanical Properties
Element Value
Poisson's ratio 0
Tensile modulus( GPa ) 0
Hardness - Knoop( kgf mm⁻² ) 0
Hardness - Vickers( kgf mm⁻² ) 0
Shear strength( MPa ) 0
Tensile strength( MPa ) 0
Fracture toughness( MPam(0.5) ) 0
Physical Properties
Element Value
Refractive index 0
Useful optical transmission range 0
Apparent porosity( % ) 0
Water absorption - saturation( % ) 0
Density( gcm⁻³ ) 2.23
Thermal Properties
Element Value
Melting point( C ) 0
Sublimation point( C ) 0
Upper continuous use temperature( C ) 0
Specific heat( J K⁻¹ kg⁻¹ ) 0
Thermal conductivity( W m⁻¹ K⁻¹ ) 0
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 0
Pultrusions
Element Value
Compressive strength( MPa ) 0
each

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Available Configurations

Properties common to all products in this list

Grade: Grade 25 Composition: SiO₂ 81/ B₂O₃ 13/Na₂O 4 Form: Ball/Sphere Material: Borosilicate Glass Commodity: Glasses Type: Precision Sphere Diameter: 10mm Sphericity: 0.5µm

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Tolerances

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