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High-End Al2O3 Ceramics: Easy to Get with New Ready-to-Press Material from Nabaltec

Tuesday, April 06, 2021

The most important reason is usually on technical side, as Al2O3 is an excellent choice when engineered parts are applied under rigid conditions. In this oper­ation purpose the high number of material advantages of alumina is beneficial. Properties like excellent thermal creep resistance, high thermal conductivity and the remarkable electric insulation are the main reasons why alumina is used in a variety of E&E applications.
This area is growing quite a lot as products like high energy LEDs, computer chips and relays, become increasingly important. Last but not least, such parts are used to a greater extent in the ever increasing electric mobility market. But also attributes like the exceptional hardness and the high wear resistance in combination with a superior corrosion resistance make alumina the leading material when it comes to applications in the engineering industry [1]. In this connection, an often addressed challenge is the failure behaviour of ceramics based on statistical effects. Their breaking behaviour is described by a relatively broad cumulative failure distribution, which makes it unusual for the responsible engineers to calculate the necessary part dimensioning [2]. Therefore, as users have to be on the safe side they calculate the ne­cessary part properties together with a big share of safety tolerance. As a result, the achievable breaking strength and hardness have to be continuously improved in order to meet the required material proper­ties. This is not only done by adjusting forming steps and sintering procedures but also by tuning the raw materials itself under the premise not to increase the costs per part significantly.

Keywords: alumina, alumina ceramics, GRANALOX®­products, advanced milling, ready-­to-­press granulates