Non-ferrous Metals
Metal Capillary
Advanced Ceramics
Boron Nitride Ceramic
Pyrolytic Boron Nitride
Silicon Nitride Ceramic
Aluminum Nitride Ceramic
Zirconia Ceramic
Alumina Ceramic
Silicon Carbide Ceramic
Deposition Materials
Semimetal Elements
Functional Materials
Neodymium Magnets
Neodymium Disc Magnets
Neodymium Cylinder Magnets
Neodymium Block Magnets
Neodymium Ring Magnets
Neodymium Countersunk Magnets
Magnetic Assemblies
Arc Magnets
Custom Shaped Magnets
Rare Earth Elements
Alumina Crucible
Alumina crucibles have good chemical corrosion resistance and high-temperature resistance. They can be used for a long time at 1650℃ or for a short time at 1800℃. They are often used in high-temperature environments. The shapes are mainly cylindrical, conical, arc-shaped, sagger-shaped, etc. The product purity is high, up to 99%. Alumina ceramic crucibles are cost-effective and have become an indispensable tool in laboratory environments.
Specifications of Alumina Ceramics
| Item | Unit | Al2O3 |
| Physical Property | ||
| Color | Ivory | |
| Density | g/cm3 | 3.7-3.9 |
| Purity | % | 95~99.8 |
| Gas Permeability | 0 | |
| Water Absorption | 0% | |
| Mechanical Properties | ||
| Vickers Hardness | GPa | 12.3-17.2 |
| Flexural Strength | MPa | 300-380 |
| Compressive Strength (HV0.5) | MPa | 2000-2350 |
| Elastic modulus | GPa | 270-380 |
| Fracture Toughness | MPam1/2 | 3.5-4 |
| Thermal Properties | ||
| The Max Working Temperature | ℃ | 1650 |
| Thermal Conductivity at room temperature | W/(m·K) | 20-32 |
| Coefficient of Thermal Expansion | 10-6/℃ | 6.5-7.2 |
| Thermal Shock Resistance | △T℃ | 200 |
| Electrical Properties | ||
| Dielectric Strength | KV/mm | 10-15 |
| Dielectric Constant | 9-10 | |
| Dielectric Loss Angle(1MHz) | 0.0002-0.0003 | |
| Volume Resistivity | Ω·cm | >1014 |
The above chart just demonstrates the typical properties of common alumina ceramic we use to produce our alumina parts. Please notice that the properties of customized alumina parts vary due to different processing. Edgetech Industries, Advanced Ceramics Division provides alumina products according to your specified instructions or does its best to meet requirements.
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Boron Nitride Tube -
BN Tubes
Application of Alumina Crucibles
Alumina crucibles are widely used. They can be used for various laboratory metal and non-metal sample analyses and melting materials. They can also be used for firing colorants, colorants, frits, pigments, luminescent materials, etc. in shuttle kilns and push-plate kilns, and for adjusting formulas in small experimental kilns and experimental electric furnaces; smelting metals, precious metals, optical glass, and for the analysis and firing of rare earth and other mineral raw materials, and the firing of high-temperature products such as ceramic powders.
Packing of Alumina Ceramics
As a ceramic material, Alumina Crucible is quite fragile in a lot of cases. Our Alumina Ceramics are carefully handled to minimize damage during storage and transportation. Suitable outer boxes and inner cushioning materials are used, and vacuum packing is also engaged for some of the parts.