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

fYear

2009

fDate

14-16 Dec. 2009

Firstpage

1

Lastpage

4

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)_0.8Ti_0.2]O_3-?? (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 (v_f = 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((Li_0.33Nb_0.67)_0.8Ti_0.2)O_3-??; 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;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Electromagnetics Conference (AEMC), 2009

Conference_Location

Kolkata

Print_ISBN

978-1-4244-4818-0

Electronic_ISBN

978-1-4244-4819-7

Type

conf

DOI

10.1109/AEMC.2009.5430628

Filename

5430628