Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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The Effect of Glass Addition on the Sintering and Dielectric Properties of BaO-Nd2O3-TiO2 Microwave Ceramics

Glass첨가에 의한 BaO-Nd2O3-TiO2계 세라믹스의 저온소결과 마이크로파 유전특성

  • Shin, Dong-Soon (Department of Materials Science and Engineering, Korea University) ;
  • Choi, Young-Jin (Department of Materials Science and Engineering, Korea University) ;
  • Park, Jae-Hwan (Multifunctional Ceramics Research Center, Korea Institute of Science and Technology) ;
  • Nahm, Sahn (Department of Materials Science and Engineering, Korea University) ;
  • Park, Jae-Gwan (Multifunctional Ceramics Research Center, Korea Institute of Science and Technology)
  • 신동순 (고려대학교 재료공학과) ;
  • 최영진 (고려대학교 재료공학과) ;
  • 박재환 (한국과학기술연구원 복합기능세라믹스연구센터) ;
  • 남산 (고려대학교 재료공학과) ;
  • 박재관 (한국과학기술연구원 복합기능세라믹스연구센터)
  • Published : 2003.01.01
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Abstract

The effect of glass addition on the low-temperature sintering and microwave dielectric properties in $BaO-Nd_2O_3-TiO_2$ dielectric ceramics were studied. When 10~30 wt% of alkali lithium borosilicate glass was added, the sintering temperature decreases from $1300^{\circ}C$;to;1000^{\circ}C$ and the relative density more than 95% was obtained. When the added amount of glass increased above 10 wt%, the density as well as dielectric properties changed, which was attributed to the second phase formation. When the sample was sintered at 100$0^{\circ}C$ with l0wt% of glass, the dielectric properties of $Qxf_o{ge}2800,;{varepsilon}_r{ge}65;and;{ au_f=+55 ppm/^{\circ}C$ were obtained.

BaO-Nd$_2$O$_3$-TiO$_2$계 유전체 세라믹스에 유리를 첨가하여 저온소결특성과 마이크로파 유전특성을 조사하였다. 알칼리가 첨가된 lithium borosilicate계 유리 프릿을 10~30wt% 범위로 첨가함으로서 소결온도를 130$0^{\circ}C$에서 100$0^{\circ}C$로 낮추었으며, 95% 이상의 상대밀도를 갖는 소결체를 얻을 수 있었다. 유리의 첨가량이 l0wt% 이상으로 증가함에 따라 결정상의 변화가 뚜렷이 나타났고 이에 따라 밀도 및 전기적 특성이 크게 변화하였다 l0wt%의 유리 프릿을 첨가하여 100$0^{\circ}C$에서 소결한 경우 유전율($\varepsilon$$_{r}$) 65 및 품질계수(Qxf) 2800GHz의 특성을 얻을 수 있었다.

Keywords

References

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