Alumina Al2O3 Machinable ceramic 960 Cotronics

Machinable Ceramic: Alumina

Machinable alumina is ready-to-use and requires no thermal treatment. However, Cotronics®960 hardener can be used for the improvement of surface resistance, with a heat treatment at 320 °C. This ceramic can withstand temperatures up to 1,650 °C, and is resistant to molten metals, acids, solvents and thermal impacts. This material is employed, in the ready-to-use state, in the electrical and electronic industries, in metallurgy, and in high-temperature vacuum technologies.

Final Advanced Materials can supply ceramic bars or plates for your own use, but it is also possible for us to undertake the complete execution of your project.

Available Products in Alumina Ceramic




from 6 mm x 150 mm x 150 mm

to 19 mm x 150 mm x 150 mm


from Ø6 mm x 150 mm 

to Ø88 mm x 300 m

We machine your parts according to your drawings.

Applications of Alumina Ceramic

  • Prototypes, brazing
  • Fixings for welding, vacuum applications, HF heating
  • Various supports
  • Electrical components, insulators.

Machining Instructions for Alumina Ceramic

Alumina can be machined using conventional high-precision tools. Work is executed in the following stages:

  • Lubrication of the tool in service using water. Water ensures cooling, and prevents cracks.

  • Cutting of material using agglomerated silicon carbide or diamond abrasive wheel, at speeds ranging from 1,800 to 2,600 rpm. A 23 m/min high-speed steel bandsaw, with 14 unlubricated teeth, is employed for the cutting of outlines.

  • Drilling with tungsten carbide bits, at a speed of 2,000 rpm. for diameters up to 6 mm and at 1,000 rpm. for larger diameters – a diameter of 12 mm (1/2”) must never be exceeded.

  • Thread cutting using a tungsten carbide tool or a grinder fitted with a diamond wheel.

  • Tapping with high-speed steel or tungsten carbide. A pilot hole, to 70 % of the final diameter, is drilled in preparation.

  • Turning, using a steel or tungsten carbide tool, or a silicon carbide grinder.

Technical Data of Alumina Ceramic

A comparative table for the available Machinable Alumina can be downloaded in the data sheet.

Physical variables included in this documentation are provided by way of indication only and do not, under any circumstances, constitute a contractual undertaking. Please contact our technical service if you require any additional information.

Machinable Alumina (154.40k)

Data Sheet: Machinable Alumina

Machinable Technical Ceramics (375.86k)

Data Sheet: Machinable Technical Ceramics

Durapot® 820 alumina coating ceramic

Durapot 820 - Ceramic embedding cement

Cotronics Durapot® 820 is a high purity ceramic embedding cement . This ceramic has an excellent electrical resistance at high temperatures. It is an air-drying paint that can withstand temperatures up to 1760°C and dries very quickly. Based on alumina, it is available in 0.94 and 3.7 litre packs.  For larger sizes, please contact us. We also offer other alumina -based products delivered in single-component form.
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Machinable alumina 960 Board

Machinable alumina 960 Board

Cotronics 960 alumina machinable board Machinable alumina is ready-to-use,  machinable with conventional tool and requires no thermal treatment. This material is employed as electrical components, insulators or as binding for weld this resistant at maximal temperature at 1,650 °C. It's available in board of 150 x 150 mm and 6 to 19 mm thick, in rods of Ø6 to 88 mm and 150 mm and 300 mm length. We propose also other portfolio of Cotronics products. Do not hesitate to contact us if you want to have more information, we also propose other machinable technical ceramics .
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Machinable Alumina Rod 960

Machinable Alumina Rod 960

Machinable Alumina Rod Cotronics 960 The Cotronics ’s machinable alumina 960 is ready-to-use and requires no thermal treatments. It is employed as electrical components, insulators or as support for welding. It resist at a maximal temperature of 1,650 °C. It is available in rod from Ø6 mm x 150 mm to Ø88 mm x 300 mm. Do not hesitate to contact us if you need more information, we also propose other machinable technical ceramics .
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