Porous ceramics RAMUL/RAKOR

Our long runners – Rauschert’s newly developed porous ceramics RAMUL, RAMUL-HT and RAKOR can be used, among other things, as firing auxiliaries and kiln components.

RAMUL and RAKOR by Rauschert are the pore ceramics of the future. With new materials and processes, we were able to lower the mass and the heat capacity of the materials at the same time. The improved thermo-mechanical properties enable thinner-walled products, without loss of mechanical strength. The creep and thermal shock resistance have proven to be excellent. When used as kiln furniture, the energy consumption and thus the CO2 emissions can be significantly reduced.

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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

RAMUL/RAMUL-HT Produktgruppe

Stützbalken für Feuerfestanwendungen

RAKOR-Produktgruppe

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.

 

Properties RAMUL RAMUL-HT RAKOR
Bulk density g/cm3 2.1 2.2 2.3
Porosity % 30 37 40
Max. operating temperature °C 1,600 1,700 1,700
Al2O3 content % 79.7 88.4 99.43
SiO2 content % 19.8 11.16 0.29
Bending strength 20 °C (3-point) N/mm2 31 25 44
Material Index I at 1,500 °C
at 1,400 °C
0.0138
0.0136

0.0210

 

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.

Material Index I RAKOR

Material Index I RAMUL

 

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