Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Preparation and Dielectric Properties of Ceramic(BNT)-Polymer(LCP) Composite

세라믹(BNT)-폴리머(LCP) 복합체 제조 및 유전특성

  • 박명성 (한국세라믹기술원 광전자세라믹본부 전자부품센터) ;
  • 전명표 (한국세라믹기술원 광전자세라믹본부 전자부품센터) ;
  • 조정호 (한국세라믹기술원 광전자세라믹본부 전자부품센터) ;
  • 남중희 (한국세라믹기술원 광전자세라믹본부 전자부품센터) ;
  • 최병현 (한국세라믹기술원 광전자세라믹본부 전자부품센터) ;
  • 남산 (고려대학교 신소재공학과)
  • Published : 2009.11.01
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Abstract

In this research, the composites (100-x)LCP-xBNT (x = 0, 10, 20, 30, 40 vol.%) were fabricated with thermoplastic LCP(Liquid Crystal Polymer) and BNT($BaNd_2Ti_4O_{12}$) which is a high frequency dielectric material. Their dielectric properties, mechanical strength and microstructure were investigated by Impedance analyser, Instron and SEM. In order to fabricate LCP-BNT composites, LCP resin was put into the twin screw type mixer($310^{\circ}C$), melted by keeping for 10 min. After that, BNT filler was dispersed with melted LCP resin for 15 min. in the mixer. For measuring the dielectric properties and mechanical strength, Composite specimens were made by pressing composite granule (LCP-BNT) with 7 ton in the mold at $310^{\circ}C$. With increasing the BNT content (0~40 vol.%) of the composite, Its dielectric constant increased, dielectric loss and flexural strength decreased. The dielectric constant and flexural strength of composites with 20~30 vol.% of BNT filler are 4.1~6.0 and 35~55 MPa respectively. BNT/LCP composite is the potential substrate material for the high frequency application.

Keywords

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