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CaZr(BO3)2 세라믹스의 마이크로웨이브 유전특성

Microwave Dielectric Properties of CaZr(BO3)2 Ceramics

  • 남명화 (고려대학교 재료공학과) ;
  • 김효태 (요업기술원 융복합기술본부) ;
  • 김종희 (요업기술원 융복합기술본부) ;
  • 남산 (고려대학교 재료공학과)
  • 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)
  • 발행 : 2007.05.31

초록

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.

키워드

참고문헌

  1. E. S. Kim, B. S. Chun, J. D. Kim, and K. H. Yoon, 'Low Temperature Sintering and Microwave Dielectric Properties of $[Ca_{0.6}(Li_{0.5}Nd_{0.5})_{0.4}]0.45Zn_{0.55}TiO_3$,' Mat. Sci. Eng., B 99 [1] 243-46 (2003) https://doi.org/10.1016/S0921-5107(02)00470-1
  2. T. Hu, A. Uusimaki, H. Jantunen, S. Leppavuori, K. Soponmanee, and S. Sirisoonthorn, 'Optimization of $MgTiO_3-CaTiO_3$ Based LTCC Tapes Containing $B_2O_3$ for Use in Microwave Applications,' Ceramics International, 31 [1] 85-93 (2005) https://doi.org/10.1016/j.ceramint.2004.03.039
  3. A. Yokoi, H. Ogawa, and A. Kan, 'Microwave Dielectric Properties of $BaO-Ta_2O_5-TiO_2$ System,' J. Euro. Ceram. Soc, 26 [10] 2069-207 (2006) https://doi.org/10.1016/j.jeurceramsoc.2005.09.061
  4. J.-j. Bian, D.-W. Kim, and K. S. Hong, 'Glass-free LTCC Microwave Dielectric Ceramics,' Mat. Res. Bull., 40 [12] 2120-29 (2005) https://doi.org/10.1016/j.materresbull.2005.07.003
  5. M. Valant and D. Suvorov, 'Glass-free Low-temperature Cofired Ceramics: Calcium Germanates, Silicates and Tellurates,' J. Euro. Ceram. Soc., 24 [6] 1715-19 (2004) https://doi.org/10.1016/S0955-2219(03)00483-7
  6. N. Iwase, 'Dolomite Type Boron Compound,' Elec. Ceram.(in JPN), 87 (2002)
  7. T. D. Thangh, N. Iwase, H. Egami, and E. Ichimori, 'Low Temperature Sintered Ceramics for Hybrid Functional Circuit (HFC) Substrates,' Proc. 3rd Int'l Microelectronics Conf., 220-23 (1984)
  8. G. Bayer, 'Thermal Expansion Anisotropy of Dolomite- Type Borates $Me^{2+}$$Me^{4+}B_2O_6$ B2O6,' Zeitschriftfur Kristallographie, 133 85-90 (1971) https://doi.org/10.1524/zkri.1971.133.133.85
  9. M. H. Nam, H. T. Kim, J. H. Nam, D. H. Yeo, J. H. Kim, and S. Nahm, 'Low-temperature Sintering and Dielectric Properties of $BaSn(BO_3)_2$ Ceramics (in Korean),' J. Kor. Ceram. Soc., 43 [2] 92-7 (2006) https://doi.org/10.4191/KCERS.2006.43.2.092