Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Microwave Dielectric Properties of CaZr(BO3)2 Ceramics

CaZr(BO3)2 세라믹스의 마이크로웨이브 유전특성

  • Nam, Myung-Hwa (Department of Materials Science and Engineering, Korea University) ;
  • Kim, Hyo-Tae (Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Jong-Hee (Korea Institute of Ceramic Engineering and Technology) ;
  • Nahm, Sahn (Department of Materials Science and Engineering, Korea University)
  • 남명화 (고려대학교 재료공학과) ;
  • 김효태 (요업기술원 융복합기술본부) ;
  • 김종희 (요업기술원 융복합기술본부) ;
  • 남산 (고려대학교 재료공학과)
  • Published : 2007.05.31
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Abstract

The microstructure and microwave dielectric properties of dolomite type borates, $CaZr(BO_3)_2$ ceramics prepared by conventional mixed oxide method were explored. The sintering temperature of $CaZr(BO_3)_2$ ceramics could be reduced from $1150^{\circ}C\;to\;925^{\circ}C$ with little amount of sintering additives. Microwave dielectric properties of 3 wt% $Bi_2O_3-CuO$ added $CaZr(BO_3)_2$ ceramics sintered at $925^{\circ}C$ were $K{\approx}10.4,\;Q{\times}f{\approx}80,000GHz\;and\;TCF{\approx}+2ppm/^{\circ}C$. Thus obtained LTCC tape was co-fired with Ag paste for compatibility test and revealed no sign of Ag reaction with the ceramics. Therefore, $CaZr(BO_3)_2$ ceramics is considered as a possible candidate material for low temperature co-fired multilayer devices.

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References

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