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Formula: Al₂O₃ /Cr₂O₃ /Si₂O₃
Form: Ball/Sphere
Material: Ruby
CAS Number: 1344-28-1
Commodity: Ceramics
Type:
Precision Sphere
Sphericity:
0.625µm
Ruby Balls from Goodfellow feature high-precision polished ruby spheres available in 20 variations. These precisely crafted balls exhibit excellent hardness, chemical resistance, and optical properties. Potential applications for Ruby Balls include instrument bearings and laser optics.. With their superior physical characteristics and precision manufacturing, Goodfellow's Ruby Balls offer exceptional performance across a variety of scientific, industrial, and commercial uses.
Tolerances
Ball/Sphere
| Diameter | Standard | ±5% |
|---|---|---|
| Diameter | Precision | See Item |
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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