Title :
Effect of filler on the microwave dielectric properties of polyethylene/ceramic composites
Author :
Sebastian, M.T. ; Thomas, Sherin ; George, Sumesh
Author_Institution :
Mater. & Miner. Div., Nat. Inst. for Interdiscipl. Sci. & Technol., Thiruvananthapuram, India
Abstract :
The present study investigates the effect of various ceramic fillers on the dielectric properties of polyethylene based composites. The fillers used were Sr9Ce2Ti12O36 (SCT), Ca[(Li1/3Nb2/3)0.8Ti0.2]O3-?? (CLNT) and Sm2Si2O7 (SS) with relative permittivities 173, 38 and 12 respectively. The composites were synthesized by melt mixing and hot pressing methods. The effect of different volume fractions of the ceramic (vf = 0 - 0.5) on the dielectric properties of the composites was investigated at 8 GHz. The dielectric properties (relative permittivity and dielectric loss) were found to increase with the ceramic filler content. The relative permittivities obtained experimentally were compared with that of the theoretical predictions.
Keywords :
ceramics; dielectric losses; filled polymers; hot pressing; melt processing; microwave materials; mixing; permittivity; Ca((Li0.33Nb0.67)0.8Ti0.2)O3-??; Sm2Si2O7; Sr9Ce2Ti12O36; ceramic filler content; ceramic volume fractions; dielectric loss; filler effect; frequency 8 GHz; hot pressing; melt mixing; microwave dielectric properties; polyethylene based composites; polyethylene/ceramic composites; relative permittivities;
Conference_Titel :
Applied Electromagnetics Conference (AEMC), 2009
Conference_Location :
Kolkata
Print_ISBN :
978-1-4244-4818-0
Electronic_ISBN :
978-1-4244-4819-7
DOI :
10.1109/AEMC.2009.5430628
