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Formula: SiO₂
Form: Rod
Material: Quartz - Fused
CAS Number: 14808-60-7
Commodity: Ceramics
Quartz - Fused Rods are amorphous forms of silicon dioxide made by fusing high-purity silica sand at high temperatures. They exhibit excellent thermal shock resistance, low thermal expansion and good chemical inertness. With 37 variations available, our extensive range of Quartz - Fused Rods offers sizes and lengths to cover diverse applications. These rods are used in semiconductor processing equipment, laboratory ware and optical fabrication. Their high purity and ability to withstand rapid temperature changes also makes them ideal for use as scientific apparatus and industrial processing components.
Tolerances
Rod
| Diameter | +20% / -10% |
|---|
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 |