Porous ceramics RAMUL/RAKOR
RAMUL is a aluminum oxide on the basis of the material mullite. Through the application of a new procedure a weight reduction of approximately 30% compared to similar materials is achieved. It is applicable for temperatures of up to 1,600 °C.
Under the name RAMUL-HT we offer a mullite ceramic. Through the use of state-of-the-art materials it possesses excellent thermo-mechanical properties and is therefore suitable for long-term high temperature applications of up to 1,700 °C.
RAKOR is a corundum ceramic developed by Rauschert. Through the use of state-of-the-art materials it possesses excellent thermo-mechanical properties and is therefore suitable for long-term high temperature applications of up to 1,700 °C. RAKOR also doesn’t absorb any lead during sintering piezo or PTC ceramics. Therefore the amount of hazardous waste is depleted and a longer lifetime is guaranteed.
Production & properties
Through the use of various shaping techniques a variety of different geometrical forms can be realized.
Typical shaping techniques are extrusion, dry and wet pressing as well as slip casting. Due to a very low shrinkage of the material a near-net shape production is possible.
|Max. operating temperature||°C||1,600||1,700||1,700|
|Bending strength 20 °C (3-point)||N/mm2||31||25||44|
|Material Index I||at 1,500 °C
at 1,400 °C
The Material Index I was established by the Fraunhofer Institute ISC as a quality criteria of high temperature materials for better comparison of materials with different densities. A lower material index means less energy expenditure with reduced creep tendency at the same time.