Made from amorphous silicon oxide, these balls are distinguished by their high hardness and resistance to extreme temperatures and thermal shocks. They are ideal for applications requiring excellent optical properties, offering high UV and IR transmittance. Marteau-Lemarie, with its expertise over 40 years, guarantees you a fast availability of stock in France.
Physical characteristics of quartz ball (sio2)
| Ownership | Value | Unit |
|---|---|---|
| Density | 2.2 | g/cm3 |
| Young Module | 73 | GPA |
| Thermal expansion coefficient | 0.5 (T=0-100°C) | × 10−6 /°C |
| Thermal conductivity | 1.42 | W/m·K |
| Volume resistivity | >10^15 | D·m |
| Relative magnetic permeability | <~1 | — |
| Magnetic behaviour | Diamagnetic | — |
| Softening temperature | 1650 | ° C |
| Refraction index | 1.459 | — |
Hardness and mechanical resistance of quartz ball (sio2)
| Ownership | Value | Unit |
|---|---|---|
| Hardness | 500-700 | Knoop |
| Hardness | 7 | Mohs |
| Exercise temperatures | 0/1000 | ° C |
| Exercise temperatures | 32/1832 | °F |
Diameters and grades available for quartz ball (sio2)
| Parameter | Value |
|---|---|
| Minimum diameter | 0.3 mm — 1/64′′ |
| Maximum diameter | 50 mm — 2′′ |
| Grades available | G10-25-50 |
Corrosion resistance of quartz ball (sio2)
Silicon oxide balls are water insoluble and highly resistant to contact with even strong acids (hydrochloric, nitric and sulphuric acid) except hydrofluoric acid. Non-optimal behaviour in alkaline solutions, they are attacked by sodium hydroxide, potassium hydroxide, sodium carbonate.
Applications of quartz ball (sio2)
Mainly used in optical devices and anti-reflective coatings.
