Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Sintering and Dielectric Properties of K2O-CaO-P2O5 Glasses-BNT(BaO-Nd2O3-TiO2) Ceramic Composites

K2O-CaO-P2O5계 유리-BNT(BaO-Nd2O3-TiO2)계 세라믹 복합체의 소결 및 유전특성

  • 오영석 (단국대학교 신소재공학과) ;
  • 이용수 (단국대학교 신소재공학과) ;
  • 강원호 (단국대학교 신소재공학과) ;
  • 정병해 (순천대학교 재료·금속공학과) ;
  • 김형순 (순천대학교 재료·금속공학과)
  • Published : 2003.10.01
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Abstract

To develop mobile phone antenna modules, glass-ceramics composites that are 20∼80 dielectric constant materials which has been fabricated. The glass-ceramics composites were based in the BNT (BaO-Nd$_2$O$_3$-TiO$_2$), and properties-a sintering and dielectric property-were investigated in its composites according to the $K_2$O-CaO-P$_2$O$_{5}$ system glass frits. The prepared ceramics were sintered at 900∼120$0^{\circ}C$ with the glass frit contents ranging from 10 to 40 wt%. The shrinkage and relative density grew into increasing glass frits and sintering temperature. Sintered composites showed the tendency that the dielectric constant ($\varepsilon$$_{r}$) and quality factor (Q${\times}$f) decreased in increasing glass frits and sintering temperature.

본 연구에서는 모바일 폰 안테나 모듈용 유전체 재료를 개발을 위해 20∼80의 유전율을 가지는 유리-세라믹스 복합체를 제조하고자 하였다. BaO-Nd$_2$O$_3$-TiO$_2$계 세라믹스에 $K_2$O-CaO-P$_2$O$_{5}$계 글래스 프릿의 첨가를 통해 제조된 글래스-세라믹스 복합체의 소결특성과 유전특성을 조사하였다. BaO-Nd$_2$O$_3$-TiO$_2$계 세라믹스에 글래스 프릿을 10∼40 wt% 범위로 첨가하였고, 900∼120$0^{\circ}C$의 온도범위에서 소결하였다. 그 결과로서, $K_2$O-CaO-P$_2$O$_{5}$계 글래스 프릿의 첨가량이 증가하고 소결온도가 증가할수록 소결수축률과 상대밀도가 증가하였다. 또한 유전율($\varepsilon$$_{r}$)과 품질계수(Q${\times}$f)는 감소하는 경향을 나타내었다.

Keywords

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