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Alumina, or aluminum oxide Al2O3, with a molecular weight of 102, is the major source of aluminium in nature. Al2O3 has very high melting point, which is 2,072 °C and it is extremely hard.
Alumina ceramic is the most common technical ceramic material and relatively traditional material. High purity aluminum oxide ceramics as a fine ceramic material is widely used in a lot of industries. This material has superb performances in electrical insulation, high thermal conductivity, high chemical resistance, good wear resistance and low thermal expansion.
| Compound Formula | Al2O3 |
| Molecular Weight | 101.96 |
| Appearance | White |
| Melting Point | 2,072° C |
| Boiling Point | 2,977° C |
| Density | 3.95 g/cm3 |
| Tensile Strength | 44 kpsi |
| Hardness | 2000 Knoop |
| Hot Expansion Coefficient | 7.6 x 10-6/°C |
| Fracture toughness | 4 – 5 MPa m½ |
Alumina tubes are used for industrial furnace and thermal couple protector. High purity alumina materials are excellent for making parts for CVD, ion implants, photolithography, and semiconductor parts.
In traditional industries, ceramics are ideal for products such as injector tubes, gas nozzles and insulators.
Compared with metals, alumina ceramic material is extremely hard, making it an ideal material for abrasive, grinding media.
Alumina mortars and pestles are widely used in laboratories for grinding hard materials.
Advanced Ceramic Materials (ACM) is a leading supplier of zirconia ceramic products of the highest quality for a wide range of applications. We are happy to provide advice on materials, design, and application. Feel free to contact us for any questions about ZrO2 or other ceramic materials that are not listed on the website.
