Fricke und Mallah
Microwave Technology GmbH
Werner-Nordmeyer-Straße 25
31226 Peine, Germany
Tel: +49 (0)5171 54 57-0 Fax -26
E-Mail: info@microwaveheating.net
Microwaves make possible an enormous shortening of processing times. Even electrical nonconducting materials are heated up rapidly and without inertia in the microwave field by polarization of their molecules. Microwaves are very suitable for heating up materials with a low thermal conductivity and a nonneglectable volume. The frequency range of microwave radiation reaches from 300 MHz up to 100 GHz. The most common frequency for industrial and domestic purpose is 2.45 GHz.
The direct volumetric heating of the materials with microwaves has also energetic advantages. It is not necessary to heat up the oven itself, therefore the effectivity of the processes is increasing. Furthermore the processes can be controlled very fast, because there are no longer thermal time constants. The simulation of heating processes in the microwave field is very difficult and complicated. Mainly because the material data of the products are often unknown. When the dimensions of the chamber are bigger than a domestic microwave oven even the biggest computers reach their limits. So experience and intuition are still very important in developing microwave ovens.