The Quantum Nature of Dielectric Heating of Water as an Example for Industrial Microwave Materials Processing

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• Prof. Lambert Feher
• Thursday 22 May 2014, 19:00-21:00
• TWI Granta Park Great Abingdon Cambridge CB21 6AL.

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It has long been known, that dielectric materials can be heated by applying electromagnetic energy. The common explanations are found due to the ability of the electric field to polarize charges in the material and the obstacle of resulting dipole polarization that cannot follow the high frequency reversals of the electromagnetic wave. Nevertheless, uniform processing of arbitrary materials raises substantial problems for microwave technology such as applicator design and process control as physically speaking a monochromatic microwave frequency is converted to a thermal radiation noise. This physical process is usually accompanied with a nonlinear thermal heat distribution and the possibility of nonlinear thermal runaway effects for the samples. In fact, a general quantum mechanical description of microwave heating for engineering application is proposed and will be applied for water and other materials. This approach shows clear limits on the well known classical treatments and gives a refined understanding on the microstructure explaining specific surprising anomalies of water, even its potential of information storage. The quantum representation can be applied for ceramics, composites, polymers, nano materials and plasma interactions. As it further turned out, microwave absorption can be fairly much more diversified due to correlation effects as classical approaches are capable to describe. The results open new strategies for the development of innovative energy efficient High Frequency Technologies and Systems to be engineered in the aerospace, automotive, chemical and environmental industry.

This talk is part of the Applied Physics Seminar Series (Institute of Physics East Anglia) series.

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• TWI Granta Park Great Abingdon Cambridge CB21 6AL

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