Low dielectric loss PTFE/CeO(2) ceramic composites for microwave substrate applications

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Title:	Low dielectric loss PTFE/CeO(2) ceramic composites for microwave substrate applications
Authors:	Anjana, P S Sebastian, M T Suma, M N Mohanan, P
Keywords:	Optoelectronic packaging materials Epoxy/silica composites Polymer composites
Issue Date:	2008
Publisher:	Wiley
Citation:	International Journal of Applied Ceramic Technology 5(4):325-333;Jul 2008
Abstract:	Cerium oxide (CeO(2)) filled polytetrafluoroethylene (PTFE) composites prepared by powder processing technique for microwave substrate application is presented in this paper. The PTFE is used as the matrix and the dispersion of CeO(2) in the composite is varied up to 0.6 by volume fraction, and the dielectric properties were studied at 1 MHz and microwave frequencies. The relative permittivity and dielectric loss increased with increase in CeO(2) content. For 0.6 volume fraction loading of the ceramic, the composite has epsilon(r) of 5 and tan delta of 0.0064 at 7 GHz. Different theoretical approaches have been employed to predict the effective permittivity of composite systems and the results were compared with that of experimental data. The serial mixing model shows good correlation with the experimental results.
URI:	http://ir.niist.res.in:8080/jspui/handle/123456789/1730
ISSN:	1546-542X
Appears in Collections:	2008

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