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Formula: Al₂O₃
Form: Crucible
Material: Alumina
CAS Number: 1344-28-1
Commodity: Ceramics
Purity:
99.8%
Alumina Round Shallow Straight Sides Crucibles are available in 16 variations in Goodfellow's range of crucibles. Alumina crucibles are made of aluminum oxide, which has high hardness, strength, and corrosion resistance at high temperatures. These properties make alumina suitable for use as crucibles in applications like melting metals at high temperatures or calcining powder samples. The round shallow straight-sided shape allows for the easy stirring of samples while heating. With a wide range of sizes to choose from, Goodfellow's Alumina crucibles can accommodate a wide choice of sample volumes for laboratory and industrial use.
Tolerances
Round, shallow, straight sides
| Outside Diameter | ±10% | |
|---|---|---|
| Inside Diameter | ±10% | |
| External Height Overall | ±10% |
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 | 9-10.1 |
| Dielectric strength( kV mm⁻¹ ) | Oct-35 |
| Volume resistivity( Ohmcm ) | >10¹⁴@25 |
Physical Properties
| Element | Value |
|---|---|
| Apparent porosity( % ) | 0 |
| Water absorption - saturation( % ) | 0 |
| Density( gcm⁻³ ) | 3.9 |
Thermal Properties
| Element | Value |
|---|---|
| Melting point( C ) | 2100 |
| Upper continuous use temperature( C ) | 1700 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 850-900@25°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 26-35@20°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 8@20-1000°C |
Mechanical Properties
| Element | Value |
|---|---|
| Tensile modulus( GPa ) | 300-400 |
| Hardness - Knoop( kgf mm⁻² ) | 2100 |
| Hardness - Vickers( kgf mm⁻² ) | 1500-1650 |
| Shear strength( MPa ) | 330 |
| Tensile strength( MPa ) | 260-300 |
Pultrusions
| Element | Value |
|---|---|
| Compressive strength( MPa ) | 2200-2600 |
Other Customers Purchased
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Zirconia - stabilized with Yttria Round, shallow, straight sides Crucible Formula: ZrO₂/Y₂O₃
Capacity: 240ml
Outside Diameter: 84mm
Height: 54mm
UOM Code: 138-206-42
eachStarting at £42.98
Discounts applied for volume purchases
