Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Low-temperature Sintering and Microwave Dielectric Properties of BaTi4O9-based Ceramics

BaTi4O9계 세라믹스의 저온소결 및 마이크로파 유전특성

  • Choi, Young-Jin (Multifunctional Ceramics Research Center, Korea Institute of Science and Technology, Department of Materials Science and Engineering, Korea University) ;
  • Shin, Dong-Soon (Multifunctional Ceramics Research Center, Korea Institute of Science and Technology, 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)
  • 최영진 (한국과학기술연구원 복합세라믹스연구센터, 고려대학교 재료공학과) ;
  • 신동순 (한국과학기술연구원 복합세라믹스연구센터, 고려대학교 재료공학과) ;
  • 박재환 (한국과학기술연구원 복합기능세라믹연구센터) ;
  • 남산 (고려대학교 재료공학과) ;
  • 박재관 (한국과학기술연구원 복합기능세라믹연구센터)
  • Published : 2003.02.01
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Abstract

Effect of glass addition on the low-temperature sintering and microwave dielectric properties of $BaTi_4O_9$-based ceramics were studied to develop the materials for the functional substrate of low-temperature co-fired ceramics. When 10 wt% of glass was added, sufficient densification was obtained and the relative density more than 98% was reached at the sintering temperature of$875{\circ}C$. The microwave dielectric properties were k=32, Q＊f=9000 GHz, ${ au}_f$=10 ppm/${\circ}C$. As the amount of glass increased, phase decompositions from $BaTi_4O_9;to;BaTi_5O_{11};and;Ba_4Ti_{13}O_{30}$ was observed.

저온동시소성 기능성 기판용 소재로 활용하기 위하여 Ba $Ti_4$ $O_{9}$계 마이크로파 유전체에 저융점의 유리 프리트를 첨가하여 저온소성 거동 및 마이크로파 유전특성을 고찰하였다. 유리 프리트의 첨가량이 증가할수록 소결 하한 온도가 낮아졌으며, l0wt%의 유리 프리트를 첨가하였을 때 875$^{\circ}C$의 소성온도에서 상대밀도 98% 이상을 나타내는 충분한 소결이 이루어졌다. 이 때 소결체의 마이크로파 유전특성은 유전율 32, 품질계수 9000 GHz, 공진주파수 온도계수 10 ppm/$^{\circ}C$으로 평가되었다. 유리의 첨가량이 증가하면서 소결 과정에서 주상인 Ba $Ti_4$ $O_{9}$가 Ba $Ti_{5}$ $O_{11}$상과 $Ba_4$ $Ti_{13}$ $O_{30}$상으로의 변화하는 현상도 관찰되었다.

Keywords

References

  1. J. Am. Ceram. Soc. v.74 no.5 Ceramic and Glass-ceramics Packaging in the 1990s R. R. Tummala https://doi.org/10.1111/j.1151-2916.1991.tb04320.x
  2. Ceram. Tran. v.26 Materials Compatibility and Cosintering Aspects of Shrinkage Control in Low-temperature Cofired Ceramic Packages H. T. Sawhill
  3. J. Am. Ceram Soc. v.77 no.9 Effect of Glass Additions on $(Zr,Sn)TiO_4$ for Microwave Applications T. Takada;S. F. Wang;S. Yoshikawa;S. J. Jang;R. E. Newnham https://doi.org/10.1111/j.1151-2916.1994.tb04629.x
  4. J. Am. Ceram Soc. v.77 no.7 Effect of Glass Additions on $BaO-TiO_2-WO_3$ Microwave Ceramics T. Takada;S. F. Wang:S. Yoshikawa;S. J. Jang;R. E. Newnham https://doi.org/10.1111/j.1151-2916.1994.tb07070.x
  5. Jpn. J. Appl. Phys. v.38 The Microwave Characteristics of Glass-$BaTi_4O_9$ Ceramic C. F. Yang https://doi.org/10.1143/JJAP.38.3576
  6. IRE Microwave Theor. Tech. v.MTT-8 A Dielectric Resonator Method of Measuring Inductive Capacities in the Millimeter Wave Range B. W. Hakki;P. D. Coleman
  7. Proc. IEEE v.59 no.11 A New Low Loss High-K Temperature Compensated for Microwave Application D. J. Masse;R. A. Purcel;D. W. Readey;E. A. Maguire;C. P. Hartwig https://doi.org/10.1109/PROC.1971.8508
  8. J. Am. Ceram. Soc. v.57 no.12 Phase Equilibria in the $TiO_2-rich$ Region of the System $BaO-TiO_2$ H. M. O'Bryan, Jr;J. Thomson, Jr. https://doi.org/10.1111/j.1151-2916.1974.tb10801.x
  9. Acta Cryst. v.B25 Die Kristallstruktur Von $BaTi_5O_{11}$ V. E. Tillmanns