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Grade: Grade 25
Formula: SiO₂
Form: Ball/Sphere
Material: Fused Silica
CAS Number: 7631-86-9
Commodity: Glasses
Diameter:
10mm
Sphericity:
0.625µm
Goodfellow's range of Grade 25 Fused Silica Balls with 2 variations, meet diverse application requirements. Made from high-purity fused silica, these balls exhibit excellent thermal shock resistance and low thermal expansion. Their spherical geometry and smooth surface finish make them ideal for applications like ball bearings, flow meters, and mixing processes where uniform quantitie, shape, and surface finish are critical. Goodfellow's fused silica balls enable precision engineering across industries like aerospace, automotive, and medical devices.
Tolerances
Ball/Sphere
| Diameter | Standard | ±5% |
|---|---|---|
| Diameter | Precision | See Item |
Material Properties for Glasses
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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Soda Lime Glass Tube Formula: SiO₂ 70/Na₂O 15/CaO 10/MgO/B₂O₃/Al₂O₃
Outside Diameter: 0.6mm
Wall Thickness: 0.06mm
Inside Diameter: 0.48mm
Length: 100mm
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Alumina Balls
Formula: Al₂O₃
Quantity: 10 Pcs
Type: Non-Precision Sphere
Sphericity: Nominal
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Borosilicate Glass Sheet Formula: SiO₂ 81% / B₂O₃ 13% / Na₂O 4%
Thickness: 1.1mm
Length 1: 30mm
Length 2: 30mm
UOM Code: 817-586-61
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Fused Silica Sheet Formula: SiO₂
Thickness: 0.635mm
Length 1: 15mm
Length 2: 15mm
CAS Number: 7631-86-9
UOM Code: 021-868-94
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Borosilicate Glass Rod Formula: SiO₂ 81% / B₂O₃ 13% / Na₂O 4%
Diameter: 0.9mm
Length: 100mm
Type: As-cut
UOM Code: 021-503-89
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Yttria-stabilized Zirconia Balls Formula: ZrO₂/Y₂O₃
Diameter: 2mm
Quantity: 100 Pcs
Type: Precision Sphere
Sphericity: 0.625µm
CAS Number: 114168-16-0
UOM Code: 157-157-51
eachStarting at $343.89
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