The effect of filler on the temperature coefficient of the relative permittivity of PTFE/ceramic composites |
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| Authors: | S Rajesh KP MuraliH Jantunen R Ratheesh |
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| Institution: | a Microwave Materials Division, Centre for Materials for Electronics Technology (C-MET), Department of Information Technology, Government of India, Athani P.O. Thrissur, Kerala 680 771, India
b Microelectronics and Materials Physics Laboratories, University of Oulu P.O. Box 4500, FI 90014 Oulu, Finland |
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| Abstract: | High permittivity and low-loss ceramic fillers have been prepared by means of the solid state ceramic route. Ceramic-filled composites were prepared by the Sigma Mixing, Extrusion, Calendering, which was followed by the Hot pressing (SMECH) process. The microwave dielectric properties of the composites were studied using X-band waveguide cavity perturbation technique. The temperature coefficient of the relative permittivity of the composites was investigated in the 0-100 °C temperature range using a hot and cold chamber coupled with an impedance analyzer. The temperature coefficient of the relative permittivity of the composites showed strong dependence on the temperature coefficient of the relative permittivity of the filler material. In the present study, a high-permittivity polymer/ceramic composite, having τεr ∼63 ppm/K, has been realized. This composite is suitable for outdoor wireless applications. |
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| Keywords: | Dielectric properties Polymer/ceramic composites Temperature stability PTFE |
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