Aluminum Oxide

Alumina (Al2O3) Description


Alumina (Aluminum oxide), Al2O3 has very high melting point, which is 2,072 °C and it is extremely hard. Alumina ceramic is the most common technical material and relatively traditional ceramic. High purity alumina has excellent performances in electrical insulation, high chemical resistance, and low thermal expansion.


Alumina can be produced in a range of purities with additives designed to enhance properties. A wide variety of ceramic processing methods can be applied including machining or net shape forming to produce a wide variety of sizes and shapes of component. In addition, it can be readily joined to metals or other ceramics using metallising and brazing techniques.


Alumina Ceramics Properties


Compound Formula


Molecular Weight




Melting Point

2,072° C

Boiling Point

2,977° C


3.95 g/cm3

Tensile Strength

44 kpsi


2000 Knoop

Hot Expansion Coefficient

7.6 x 10-6/°C

Fracture toughness

4 – 5 MPa m½


Alumina Applications


Electronic substrates

Ballistic armour

Thermocouple tubes

Electrical insulators

Grinding media

Thermal couple protector



Alumina Products

Alumina Mortar and Pestle Set

Alumina Ball

Alumina Crucible

Alumina Tube

Alumina Rod

Alumina Plate

Alumina Foam