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Temperature Assessment Of Microwave-Enhanced Heating Processes.
B García-Baños1, J J Reinosa2, F L Peñaranda-Foix3
1ITACA Institute, Universitat Politècnica de València, Valencia, 46022, Spain. beagarba@upvnet.upv.es.
Scientific Reports
|July 27, 2019
Summary
Real-time permittivity measurements under microwave fields offer insights into material thermal processes. A novel calibration method improves bulk temperature accuracy, aiding the study of non-thermal microwave effects.
Area of Science:
- Materials Science
- Electromagnetism
- Physical Chemistry
Background:
- Accurate temperature measurement is crucial for understanding microwave-enhanced thermal processes.
- Existing methods struggle with precise bulk temperature determination under intense microwave irradiation.
- Identifying non-thermal microwave effects requires reliable thermal data.
Purpose of the Study:
- To propose and validate real-time, in-situ permittivity measurements for studying microwave-enhanced thermal processes.
- To develop a robust temperature calibration method for microwave environments.
- To correlate dielectric permittivity data with other thermal analysis techniques to investigate non-thermal effects.
Main Methods:
- Real-time dielectric permittivity measurements under intense microwave fields.
- A novel temperature calibration method integrating data from four independent techniques.
- Correlation of permittivity measurements with Differential Thermal Analysis (DTA) and Raman spectroscopy.
Main Results:
- The developed temperature calibration method accurately relates bulk and surface temperatures under microwave irradiation.
- Dielectric permittivity measurements provide valuable information on thermal transitions.
- Comparison with DTA and Raman spectroscopy highlights the potential for identifying specific microwave effects.
Conclusions:
- The combination of in-situ permittivity measurements and advanced temperature calibration is a powerful tool for materials research.
- This integrated approach can scientifically validate the existence of non-thermal microwave effects.
- Accurate thermal characterization is key to unlocking the full potential of microwave processing in materials science.
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