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Formula: SiO₂
Form: Crucible
Material: Quartz - Fused
CAS Number: 14808-60-7
Commodity: Ceramics
Quartz - Fused Classic Crucibles are a part of Goodfellow's range of laboratory equipment. Fused quartz has very high purity and excellent resistance to thermal shock, making it ideal for use as crucibles and other vessels in laboratory environments. Rectangular in shape, these crucibles are commonly used in materials research to contain samples during heating, melting and other high temperature processes. With precise dimensions and uniform wall thickness, they provide reproducible conditions for experiments.
Tolerances
Classic
| Outside Diameter | ±10% | |
|---|---|---|
| Inside Diameter | ±10% | |
| Height | ±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 |