Influence of Ca[(Lisub 1/3 bsub 2/3)sub 0.8 exp isub 0.2]Osub 3-[delta] Filler on the Microwave Dielectric Properties of Polyethylene and Polystyrene for Microelectronic Applications

• Published in: Polymer engineering and science Vol. 50; no. 3; pp. 570 - 576
• Main Authors: George, Sumesh, Deepu, Vasudevan Nair, Mohanan, Pezholil, Sebastian, Mailadil Thomas
• Format: Journal Article
• Language: English
• Published: 01.03.2010
• ISSN: 0032-3888

Ceramic reinforced polyethylene and polystyrene composites were prepared by melt mixing and hot molding techniques. Temperature stable low-loss Ca[(Lisub 1/3 bsub 2/3)sub 0.8 Tisub 0.2]Osub 3- (CLNT) ceramic was used as the filler to improve the dielectric properties of the polymers. The relative permittivity and dielectric loss in the microwave frequency range were increased with increase in the ceramic loading. As the filler content increased from 0 to 0.50 volume fraction, the relative permittivity increased from 2.3 to 9 and dielectric loss tangent from 0.0006 to 0.005 for poly-CLNT ethylene-CLNT composite. In the case of polystyrene-composite, the relative permittivity and dielectric loss tangent increased from 2.1 to 10.5 and 0.0005 to 0.0032 respectively with increase in filler content from 0 to 0.50 volume fractions. The thermal stability of the relative permittivity of polymer ceramic composites was also investigated. The experimentally observed relative permittivity was compared with theoretical models. [PUBLICATION ABSTRACT]