Processing of materials using electromagnetic fields
Edited book (chapter)
Chapter Title | Processing of materials using electromagnetic fields |
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Book Chapter Category | Edited book (chapter) |
ERA Publisher ID | 2349 |
Book Title | Wiley encyclopedia of composites, 2nd ed. |
Authors | |
Author | Ku, Harry S. |
Editors | Nicolais, Luigi and Borzacchiello, Assunta |
Edition | 2nd edition |
Page Range | 2487-2500 |
Number of Pages | 14 |
Year | 2012 |
Publisher | John Wiley & Sons |
Place of Publication | Hoboken, NJ. United States |
ISBN | 9780470128282 |
Digital Object Identifier (DOI) | https://doi.org/10.1002/9781118097298 |
Web Address (URL) | http://onlinelibrary.wiley.com/doi/10.1002/9781118097298.weoc205/pdf |
Abstract | The paper started by explaining the advantages of microwave processing over conventional heating of materials. This was followed by mentioning that loss tangent is the most important property in microwave processing. The most common generator of microwaves is 2.45 GHz magnetron which is used in home microwave ovens. However, the drawback of microwave processing of materials, using fixed frequency irradiation, is localized heating which would eventually lead to thermal runaway. Variable frequency microwave (VFM) processing of materials was therefore mentioned together with its advantages. VFM offers rapid, uniform and selective heating over a large volume and at a high energy coupling efficiency. This is accomplished using preselected bandwidth sweeping around a central frequency employing tuneable sources such as travelling wave tubes as the microwave power amplifier. Several recent successful applications using fixed and variable frequency microwaves were than described. |
Keywords | microwaves; fixed frequency microwaves; variable frequency microwaves; VFM; thermal runaway and loss tangent |
ANZSRC Field of Research 2020 | 400907. Industrial electronics |
401602. Composite and hybrid materials | |
401205. Experimental methods in fluid flow, heat and mass transfer | |
Public Notes | Copyright © 1999–2013 John Wiley & Sons, Inc. |
Byline Affiliations | Centre of Excellence in Engineered Fibre Composites |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q1818/processing-of-materials-using-electromagnetic-fields
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