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Formula: Al₂O₃ /Cr₂O₃ /Si₂O₃
Form: Single Crystal
Material: Ruby
CAS Number: 1344-28-1
Commodity: Ceramics
Ruby Single Crystal is a type of single crystal offered by Goodfellow within their range of advanced engineered materials. Ruby has outstanding hardness, thermal conductivity, and chemical resistance. Its key properties make ruby well suited to applications like bearings, laser optics, and semiconductor substrates. With precise control of structure, Goodfellow produces high-quality ruby single crystals to meet the stringent requirements of research and industry.
Tolerances
Single Crystal
| Orientation | See Item | |
|---|---|---|
| Thickness | +2% / -1% | |
| Length | +2% / -1% |
Material Properties for Ceramics
Chemical Resistance
| Element | Value |
|---|---|
| Acids - concentrated | Good |
| Acids - dilute | Good |
| Alkalis | Good |
| Halogens | Good |
| Metals | Good |
Electrical Properties
| Element | Value |
|---|---|
| Dielectric constant | 7.5-11.5 |
| Dielectric strength( kV mm⁻¹ ) | 15-50 |
| Volume resistivity( Ohmcm ) | 10¹⁴@25 |
Physical Properties
| Element | Value |
|---|---|
| Useful optical transmission range | 150-5500nm |
| Apparent porosity( % ) | 0 |
| Water absorption - saturation( % ) | 0 |
| Density( gcm⁻³ ) | 3.98 |
Thermal Properties
| Element | Value |
|---|---|
| Melting point( C ) | 2050 |
| Upper continuous use temperature( C ) | 1800-1950 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 750@25°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 35-40@20°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 5.8@20-1000°C |
Mechanical Properties
| Element | Value |
|---|---|
| Tensile modulus( GPa ) | 350-390 |
| Hardness - Knoop( kgf mm⁻² ) | 2000 |
| Hardness - Vickers( kgf mm⁻² ) | 2500-3000 |
| Tensile strength( MPa ) | 250-400 |
Pultrusions
| Element | Value |
|---|---|
| Compressive strength( MPa ) | 2100 |
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