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Al2O3 Aluminum Oxide

Technical alumina high performance ceramics

Special Properties

  • High purity of 99,7 %
  • Excellent thermal resistance
  • Very good electrical insulation characteristics
  • Extremely strong dielectric strength
  • Very good mechanical strength
  • Exceptionally good tribological properties
  • Can be processed with conventional CNC-machines with abrasive tools
  • Low dissipation factor
  • High chemical strength
  • Good metallizability
  • Very hard material

Typical Applications

  • Heat resistant ceramic components
  • Electrical performance insulators
  • Space Applications
  • Dielectric for capacitors
  • Welding nozzles
  • Ceramic Bushings

 

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Al2O3, aluminum oxide characteristics

Al2O3 alumina is a white and opaque high performance ceramic with exceptional physical characteristics. It is extremely temperature resistant and offers a very good mechanical strength. The material, that is also called aluminum oxide, offers an excellent electrical insulation properties, has a low dissipation factor, and a great dielectric strength. These qualities enable the use in high voltage electrical applications.

The mechanical properties of advanced Al2O3 ceramic materials are also remarkable. Hence, aluminum oxide materials are often used when components must withstand strong mechanical wear. They can offer a very good wear resistance. Due to its excellent tribologicals, much longer life times of components and workpieces can be achieved with Al2O3. Furthermore, the chemical strength of alumina is considerable. It can resist most acids and alkalis even at increased temperatures.

Since aluminum oxide materials can be ground using conventional abrasive tools on conventional CNC-machines, complex workpieces based on this special ceramic material can be manufactured. The potential complexity of the components manufactured of aluminum oxide is limited only by the the machinery used, so even very complex precision workpieces can be produced of Al2O3 aluminum oxide. To request further specific information about our aluminum oxide materials, please use our information request form.

 

To get a quotation for your individual component made of Al2O3 aluminum oxide, please use our inquiry form by clicking on the button below:

 

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Specifications

Raw Density

  • 3,75 - 3,94 g/cm3

Purity

  • 99,7 % Al2O3 (Alumina)

Type classified by DIN EN 60672

  • C799

Coefficient of Expansion

  • 78 x 10-7 / °C (20-700 °C)
  • 86 x 10-7 / °C (20 - 1000 °C)

Thermal

  • Max. operating temperature under
    mechanical load: approx. 1700 °C
  • Good thermal shock resistance
  • Specific heat capacity: 990 J kg-1 K-1
    (20-100 °C)

Mechanical

  • Modulus of elasticity : 300-380 GPa
  • Mohs hardness : 9
  • Modulus of rupture : 300 Gpa (20 °, 3-Point)

Electrical

  • Electric strength: 17 kV/mm (IEC 672-2)
  • Specific DC-resistance: 1014 Ω cm (20 °C)

Other specifications

  • Water absorption capacity: ≤ 0,2 %
  • Leak rate: 10-10 hPa dm3 s-1 (20 °C)

 

All given details and specifications given here are mean reference values and are not guaranteed. In addition, please consider our "Notes on technical specifications"