Preparation and Dielectric Properties of LCP and BaTiO<sub>3</sub> Composites

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doi:2003.40.12.1183

J. Korean Ceram. Soc. > Volume 40(12); 2003 > Article

Journal of the Korean Ceramic Society 2003;40(12): 1183.
doi: https://doi.org/10.4191/kcers.2003.40.12.1183

LCP(Liquid Crystal Polymer)와 BaTiO₃복합체의 제조 및 유전특성

윤기현, 이승주, 양병덕, 김종희¹

연세대학교 세라믹공학과
¹삼성전기 주식회사

Preparation and Dielectric Properties of LCP and BaTiO₃ Composites

ABSTRACT

LCP (Liquid Crystal Polymer)/BT(BaTiO$_3$) composite was prepared by mixing LCP varnish and BT slurry. And the effect of the composition of LCP/BT composites and the size of BT powder on dielectric properties of LCP/BT composite were investigated. The dispersion properties of BT slurries were also studied as a function of volume fraction of dispersant, GLYMO (3-glycidyloxypropyltrimethoxysilane) added to various sized BT powders. The quantity of optimum dispersant in BT slurry decreased with an increase of BT powder size because of the decrease of specific surface area of BT powder. LCP/BT composite sheet was prepared by tape-casting method with mixing BT slurry and LCP varnish. The dielectric constant of the composites increased from 34.3 to 44.1 and their dielectric loss increased from 0.05 to 0.063 as the size of BT powder increased from 100 nm to 500 nm.

Key words: Liquid crystal polymer, $BaTiO_3$, Composite, Dielectric, Dispersion