aluminum Oxide


Aluminum Oxide is a solid chemical compound of aluminum and oxygen and is the most commonly occuring form of aluminum oxides.  Commonly called alumina, it is an outstanding ceramics material due to it’s hardness and high melting point. 

Aluminum Oxide is the most commonly used material in technical ceramics and available in a variety of purities. 

Aluminum Oxide is the most commonly used material in technical ceramics, and the chemical, medical and wear industries. It is available in a variety of purities and has an excellent cost-to-material performance record, making it a suitable choice for selected wear liners, mechanical pump seal faces, insulators and other electrical applications.  

Aluminum Oxide
Aluminum Oxide

Aluminum Oxide material characteristics

mechanical strength

Our Al2O3 material has comparable strength numbers to higher end non-oxide materials such as silicon carbide.

electrical insulation

Sintering specifically developed powders at high temperatures allows us to offer materials that possess excellent electrical properties.  They have a high thermal conductivity and act as insulators.

Corrosion Resistance

Our Al2O3 materials are corrosion-resistant against diluted acids and caustic solutions due to it’s resistance to weathering.

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Aluminum Oxide Properties

Physical PropertyUnitsTypical Value
Color White
Hardness (Rockwell 45N)R45N78
Elastic ModulusGPa276
Flexural Strength (3 Pt Bend)MPa338
Tensile StrengthMPa221
Compressive StrengthMPa2482
Fracture ToughnessMPa-m 1/23-4
Poisson’s Ratio0.21
Coefficient of Thermal Expansion 25-1000° C1 x 10 ^ -6 / °C6.1
Thermal ConductivityW/mK16
Physical PropertyUnitsTypical Value
Hardness (Vickers)GPa14.3
Elastic ModulusGPa379
Flexural Strength (3Pt Bend)MPa338
Tensile StrengthMPa172
Compressive StrengthMPa2137
Fracture ToughnessMPa-m 1/24-5
Poisson’s Ratio0.23
Max Use Temp°C1675
Coefficient of Thermal Expansion 25-100°C1 x 10 ^ -6 / °C6.3
Coefficient of Thermal Expansion 25-300°C1 x 10 ^ -6 / °C6.9
Coefficient of Thermal Expansion 25-600°C1 x 10 ^ -6 / °C7.6
Thermal ConductivityW/mK30
Electrical ResistivityΩ-cm>10^14

All properties are at room temperature (20°C) unless otherwise stated.

Aluminum Oxide Products

Aluminum oxide is a commonly used material in food processing because it has high purity and biocompatibility.  In an industry where high levels of hygiene and purity are required, aluminum oxide acts inert, non-toxic, and does not react with food.  It is also chosen for its long-lasting performance and minimal contamination.

Aluminum oxide is used as a key component in ceramic 3D printing materials. It can be combined with other ceramic powders to create ceramic-based 3D printing materials that can be used in applications such as prototyping, aerospace, electronics, and medical implants.

The wear resistance of aluminum oxide ensures that the tiles resist scratching, chipping, and abrasion from abrasive materials, thereby extending the lifespan of the tiles and protecting the underlying surfaces. The tiles can withstand repeated contact with abrasive particles or slurries, minimizing damage and maintaining structural integrity over time. These tiles are used in various industrial applications where surfaces are subjected to heavy wear, such as in mining, cement production, chemical processing, and power generation.

advanced ceramics

Aluminum oxide is used to manufacture advanced ceramic products, such as cutting tools, wear-resistant components, electrical insulators, and spark plugs.


Aluminum oxide is used as a refractory material in the production of kiln linings, furnace linings, and other high-temperature applications.

Frequently Asked Questions

Aluminum oxide is a chemical compound of aluminum and oxygen with the chemical formula Al₂O₃. It is the most commonly occurring of several aluminum oxides.  Aluminum oxide material is the most commonly used ceramic material in the chemical, medical and wear industries.

Aluminum oxide is produced by washing the rocky material bauxite with a hot solution of sodium hydroxide (NaOH). The aluminum hydroxide (Al(OH3)) that is produced in this reaction is then heated to drive off water, producing aluminum oxide.

It is highly resistant to thermal shock and chemical attack even at raised temperatures. These properties are why aluminum oxide stands out as the material of choice for low-cost production and manufacturing requirements.  It’s lower cost combined with good thermal, wear and corrosion performance make it an ideal choice for most Industrial Applications.

Mechanical Seal Faces, Wear Tiles, Body Armor, Laboratory Ware, and Wear Components are made with aluminum oxide. 

Our supplier fell through and we were in a huge bind. Calix Ceramic Solutiuons stepped in and got us samples quickly and were able to manufacture a custom wear ring for us in time to save many orders. They continue to meet their ship dates. Thanks Calix.
Shelly F.
Purchasing Manager

aluminum oxide ceramics - pricing structure

  • Forming Method – the method used to produce the near net shape component
  • Machining Requirements – the type of tooling required and amount of machining necessary to achieve the final product
  • Component Details – the specifics of the end user’s components such as tolerance requirements
  • Quantity of Pieces

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