Transactions on Electrical and Electronic Materials

  • 제4권2호
  • /
  • Pages.24-28
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  • 2003
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  • 1229-7607(pISSN)
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  • 2092-7592(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
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Dielectric Properties of Zr-doped (Ba,Sr,Ca)TiO3 Thick Films for Microwave Phase Shifters

  • Lee, Sung-Gap (Department of Electric and Electronics Engineering, Seonam University) ;
  • Lee, Sang-Heon (Department of electronics Information and Communication Engineering, Sunmoon University)
  • 발행 : 2003.04.01
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초록

(Ba,Sr,Ca)TiO$_3$ powders, prepared by the sol-gel method, were mixed with organic binder and the BSCT thick films were fabricated by the screen printing techniques on alumina substrates. All the BSCT thick films, sintered at 1420$^{\circ}C$, showed the typical XRD patterns of a perovskite polycrystalline structure. The average grain sizes decreased with increasing amounts of ZrO$_2$, and the BSCT(40/40/20) thick films doped with 2wt% MnO$_2$ showed a value of 8$\mu\textrm{m}$. The thickness of thick films by four-cycle on printing/drying was approximately 951$\mu\textrm{m}$. The relative dielectric constant decreased with increasing Ca content and MnO$_2$ doping amount. The relative dielectric constant, dielectric loss and tunability of the BSCT(50/40/10) thick films doped with 2.0wt% ZrO$_2$ were 772, 0.184％ and 15.62%, respectively.

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참고문헌

  1. P. S. Kang, K. T. Kim, D. P. Kim, C. I. Kim, and S. J. Lee, 'The etching charactehstics of ($Ba_0.6Sr_0.4TiO_3$films using Ar/$CF_4$ inductively coupled plasma', J. of KIEEME, Vol. 15, p. 933, 2002
  2. S. G. Lee, 'Dielecthc properties of (Ba,Sr,Ca)Ti$0_3$ceramics modified with MgO for phased array antennas', J. Korean Phys. Soc. Vol. 41, p. 129, 2002
  3. B. Jaffe, W. R. Cook, and H. Jaffe, 'Piezoelecthc Ceramics', Academic Press, New York, 1971, p. 98
  4. S. G. Lee, Y. H. Lee, and S. G. Bae, 'A study on the stmctural and dielecthc properties of (Ba,Sr,Ca)Ti$0_3$ with sintering conditions', J. of KIEEME, Vol. 14, p. 460, 2001
  5. H. Diamond, 'Variation of permittivity with etectric field in perovskite like ferroelectrics', J. Appl. Phys., Vo1.32, p. 909, 1961 https://doi.org/10.1063/1.1736132
  6. Y. H. Lee, J. H. Chung, M. K. Lee, and K. W. Ryu, 'Electhcal properties of the (Ba,Sr)Ti$0_3$ thin films prepared by sol gel method', J. of KIEEME, Vol. 13, p.592, 2000
  7. L. Wu, Y. C. Chen, Y. P. Chou, Y. T. Tsai, and S. Y. Chu, 'Dielectric properties of $Al_2O_3$ doped barium strontium titanate for application in phased array antennas', Jpn. J. Appl. Phys., Vol. 38, P. 5154, 1999 https://doi.org/10.1143/JJAP.38.5154