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- Title
Electrical and thermal properties of PTFE-SrZnSiO composites.
- Authors
Joseph, T.; Uma, S.; Philip, J.; Sebastian, M. T.
- Abstract
new polymer-ceramic composite was prepared using PTFE and low loss SrZnSiO. The dielectric properties of the composite were studied in the microwave and radiofrequency ranges. The relative permittivity (ε) and dielectric loss (tan δ) increased with the filler loading from 0.10 to 0.50 volume fractions (v). The observed values of ε, thermal conductivity and coefficient of thermal expansion (CTE) were compared with the corresponding theoretical predictions. The ability of the composite towards moisture absorption resistance was studied as a function of filler loading. It was also found that the variation of ε was less than 2% in the temperature range 25-90 °C, at 1 MHz. For a filler content of 0.50 v, the PTFE/SrZnSiO composite exhibited ε = 4.4 tan δ = 0.003 (at 4-6 GHz), CTE = 38.3 ppm/°C, thermal conductivity = 2.1 W/mK and moisture absorption = 0.09 wt%.
- Subjects
CERAMICS; DIELECTRICS; THERMAL conductivity; MICROWAVES; THERMAL expansion
- Publication
Journal of Materials Science: Materials in Electronics, 2011, Vol 22, Issue 8, p1000
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-010-0250-4