Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Low Temperature Sintering and Microwave Properties in (Mg0.93Ca0.07)TiO3 Ceramics

(Mg0.93Ca0.07)TiO3 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-Gwan (Multifunctional Ceramics Research Center, Korea Institute of Science and Technology) ;
  • Park, Jae-Hwan (Multifunctional Ceramics Research Center, Korea Institute of Science and Technology) ;
  • Nahm, Sahn (Department of Materials Science and Engineering, Korea University)
  • 신동순 (고려대학교 재료공학과) ;
  • 최영진 (고려대학교 재료공학과) ;
  • 박재관 (한국과학기술연구원 복합기능세라믹스연구센터) ;
  • 박재환 (한국과학기술연구원 복합기능세라믹스연구센터) ;
  • 남산 (고려대학교 재료공학과)
  • Published : 2002.06.01
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Abstract

The effects of alumine borosilicate glass composition on the densification and the microwave properties of (M $g_{0.93}$C $a_{0.07}$)Ti $O_3$ ceramics were studied. As the amount of glass increase, the density of ceramics increases and grain growth enhances. When 20 ~30 wt% of glass added, it was densified to over 95% of (M $g_{0.93}$C $a_{0.07}$)Ti $O_3$ theoretical density. (M $g_{0.93}$C $a_{0.07}$)Ti $O_3$ ceramic sintered at 95$0^{\circ}C$ exhibits dielectric constants of 15~16, quality factor of 8000 and temperature coefficient of resonant frequency of -45 ppm/$^{\circ}C$ by adding 20 wt% alumine borosilicate glass.

(M $g_{0.93}$C $a_{0.07}$)Ti $O_3$마이크로파 유전체 세라믹스에 alumine borosilicate계 유리를 5~30wt% 첨가하여 저온소결 특성과 마이크로파 유전 특성을 조사하였다. (M $g_{0.93}$C $a_{0.07}$)Ti $O_3$에 alumine borosilicate계 유리를 첨가함으로서 소결온도를 135$0^{\circ}C$에서 95$0^{\circ}C$로 낮추었으며, 유리의 첨가량이 증가함에 따라 소결밀도의 증가 및 입성장이 뚜렷이 나타났고 20~30wt%의 유리가 첨가된 영역에서는 95%의 상대밀도를 갖는 소결체를 얻을 수 있었다. (M $g_{0.93}$C $a_{0.07}$)Ti $O_3$에 20wt%의 alumino boiosilicate계 유리를 첨가함으로서 95$0^{\circ}C$에서 유전율($\varepsilon$$_{r}$)은 15~16, 품질계수(Q$\times$f)는 8000이었으며, 이때 공진주파수의 온도 계수($ au$$_{cf}$ )는 -45 ppm/$^{\circ}C$을 나타내었다.

Keywords

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