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TECHNICAL PAPERS

A Control System for Microwave Processing of Materials

[+] Author and Article Information
P. Groombridge, A. Oloyede

School of Mechanical, Manufacturing and Medical Engineering, Queensland University of Technology, G.P.O. Box 2434, Brisbane, Queensland, 4000, Australia

E. Siores

Industrial Research Institute, Swinburne University of Technology, P.O. Box 218, Hawthorn, Victoria, 3122, Australia

J. Manuf. Sci. Eng 122(1), 253-261 (Apr 01, 1999) (9 pages) doi:10.1115/1.538902 History: Received December 01, 1997; Revised April 01, 1999
Copyright © 2000 by ASME
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References

Metaxas, A. C., and Meredith, R. J., 1983, Industrial Microwave Heating, Peter Peregrinus Ltd, London, Book.
Soon, C. T., Nov. 1996, “Microwave Joining of Ceramics,” Manufacturing Project Report, Queensland University of Technology, Brisbane, Project Report.
Fukushima, H., Yamanaka, T., and Matsui, M., 1990, “Microwave Heating of Ceramics and its Application to Joining,” J. Mater. Res., 5 , No. 2.
Do Rego, D., Nov. 1991, Continuous Joining of Flat PVC Using Focussed Microwave Energy, BE (Mechanical) thesis, University of Wollongong.
Glutz, P., Nov. 1990, Microwave Joining of Plastics, BE (Mechanical) thesis, University of Wollongong.
Liu, F., Turner, I., Siores, E., and Groombridge, P., 1996, “A Numerical and Experimental Investigation of the Microwave Heating of Polymer Materials Inside a Ridge Waveguide,” J. Microwave Power Electromagn. Energy, 31 , No. 2.
Siores, E., and Groombridge, P., 1996, “Microwave Guide Design and Temperature Control for Joining Thermoplastics,” Asian Pacific Welding Congress, Conference, Auckland, N.Z.
Bond,  G., Boyes,  R. B., Pollington,  S. D., and Whan,  D. A., 1991, “Measurement of Temperature During Microwave Heating,” Meas. Sci. Technol., 2, pp. 571–572.
Bowman, R. R., 1976, “A Probe for Measuring Temperature in Radio Frequency Heated Material,” Transactions on Microwave Theory and Techniques.
Buchta, R., Zhang, S. L., and Sigurd, D., 1993, “Temperature Control During Chemical Vapor Deposition of Polycrystalline Silicon with Substrate Heating by Microwaves,” Appl. Phys. Lett., 62 , No. 24.
Katzir, B. F., Asfour, Y., Zur, A., and Valery, C. R., 1988, “Infra Red Fibre Optics for Thermometry in Microwave,” Appl. Phys. Lett., 53 , No. 19.
Zur, A., and Katzir, A., 1987, “Fibres for Low Temperature Radiometric Measurements,” Appl. Opt., 26 , No. 7.
Kaufmann, W. J., III, 1985, Universe, W. H. Freeman and Company, Book, New York, pp. 317–318.
Brydson, J. A., 1989, Plastics Materials, Butterworth Heinemann, Oxford.
Yarlagadda, P. K. D. V., Ahmed, A., Soon, S. T., and Siores, E., 1997, “Microwave Welding of Alumina Ceramic Using a Ridge Waveguide,” Microwave Theory and Applications in Materials Processing, Ceramic Transactions, Vol. 80.
National Materials Advisory Board on Engineering Technical Systems, 1991, “Microwave Processing of Materials,” National Research Council, Washington D.C.
Peterson, E. R., Oct. 1989, “Modelling Using Dielectric Properties of Select Packaging Polymers,” Dow Chemical USA, Report, pp. 1-2-1 to 1-2-10.
Groombridge, P., Oloyede, A., and Siores, E., 1997, “Process Control in Microwave Joining of Materials,” Australasian Conference on Technology for Manufacturing, Palmerston North, New Zealand.

Figures

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Dielectric loss factor of nylon 6 versus temperature 17
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Prototype of microwave joining apparatus 18
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Ridged waveguide applicator 18
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Standing wave pattern at four power levels with dummy load
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Standing wave pattern at four power levels with short circuit
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Temperature versus time for ABS heated at different power levels 18
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Variation in heating times for ABS heated at the same constant power level 18
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Heating time variation versus short circuit position 18
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Temperature versus time for timber heated in a rectangular waveguide

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