The Structural and Microwave Dielectric Properties of the BMT Ceramics with Sintering Temperature and BCN Composition Ratio

소결온도와 BCN 초성에 따른 BMT 세라믹스의 구조 및 마이크로파 유전특성

  • 최의선 (광원대학 전자재료공학과) ;
  • 이문기 (광원대학 전자재료공학과) ;
  • 류기원 (여주대학 전자과.) ;
  • 이성갑 (서남대학 전자전기공학부.) ;
  • 이영희 (광운대학 전자재료공학과.)
  • Published : 2002.07.01


The microwave dielectric properties of Ba(Mg$_{1}$3/Ta$_{2}$3/O$_3$-Ba(Co$_{1}$3/Nb$_{2}$3/O$_3$[BMT-BCN] ceramics were investigated. The specimens were prepared by the conventional mixed oxide method with the sintering temperature of 15$25^{\circ}C$~1575$^{\circ}C$. It was found that Ba(Mg$_{1}$3/Ta$_{2}$3/O$_3$[BMT] and BCN formed a solid solution with complex perovskite structure. As increasing the mole fraction of BCN, dielectric constant increased while the temperature coefficient of resonant frequency was changed from positive to negative value. The highest value of quality factor, Q$\times$f$_{0}$=138,205GHz, obtained in the 0.9BMT-0.1BCN ceramics sintered at 1575$^{\circ}C$. In the range of x$\geq$0.4, the dielectric constant was about 30. The 0.55BMT-0.45BCN ceramics sintered at 15$25^{\circ}C$ for 5 hours showed the microwave dielectric properties of $\varepsilon$$_{r}$=30.21, Q$\times$f$_{0}$=85,789GHz and $\tau$$_{f}$=2.9015ppm/$^{\circ}C$.EX>.


  1. M. Onoda, 'Ba$(Zn_{\frac{1}{3}}Nb_{\frac{2}{3}})O_3$-Sr$(Zn_{\frac{1}{3}}Nb_{\frac{2}{3}})O_3$ Solid Solution Ceramics with Temperature-Stable, High Dielectric Constant and Low Microwave Loss', Jpn. J. Appl., Vol.21, No.12, 1982
  2. S. Kawashima et al., '$Ba(Zn_{1/3}Ta_{2/3})O_3$ Ceramics with Low Dielectric Loss at Microwave Frequencies', J. Am. Ceram. Soc., Vol.66, No.6, pp.421 -423, 1983
  3. K. Wakino, 'Relations between Microwave Dielectric Losses and Microstructure on $(Zn,Sn)TiO_3$ Dielectric Ceramics', 日本窯業協會誌, 88(8), pp.475-482, 1980
  4. 安井 至 外, 'セラミツクス キャラクタりゼショソ技術, 窯業協會, pp. 7-8, 1987
  5. B. W. Hakki et al., 'A Dielectric Resonator Method of Measuring Inductive Capacities in the Millimeter Range', IRE Trans. on Microwave Theory and Technique, Vol. MTT-24, No. 10, 1960
  6. Y. Kobayashi et al., 'Microwave Measurement of Dielectric Properties of Low-Loss Materials by the Dielectric Rod Resonator Method', IEEE Trans. on Microwave Theory and Techniques, Vol. MTT-33, No.7, 1985
  7. S. B. Desu and H. M. O'bryan, 'Microwave Loss Quality of $BaZn_{\frac{1}{3}}Ta_{\frac{2}{3}}O_3$ Ceramics', J. Am. Ceram. Soc., 68(10), pp.546-551, 1985
  8. S. Nomura, K. Toyama, and K. Kaneta, 'Ba$(Mg_{\frac{1}{3}}Ta_{\frac{2}{3}})O_3$ Ceramics with Temperature -Stable Loss', Jpn. J. Appl. Phys, 21(10), L624-L626, 1982
  9. J. M. Wu, 'Reaction Sequence and Effect of Calcination and Sintering on Microwave Properties of $(Ba,Sr)O-Sm_2O_3-TiO_2$ Ceramics', J. Am. Ceram. Soc., Vol.73, No.6, pp.1599-1605, 1990
  10. Peter K. Davies and Jianzhu Tong, 'Effect of Ordering-Induced Domain Boundaries on Low-Loss $Ba(Zn_{1/3}Ta_{2/3})O_3-BaZrO_3$ Perovskite Microwave Dielectrics', J. Am. Ceram. Soc., 80[7] pp.1727-1740, 1997
  11. 이영희 등, '소결온도에 따른 $0.9MgTiO_3-0.1SrTiO_3$ 세라믹스의 구조 및 마이크로파 유전특성', 대한전기학회논문지, Vol.49, No.5, pp.294-298, 2000
  12. 이영희 등, '소결온도와 Sr몰비에 따른 $Mg_{1-x}Sr_xTiO_3$ 세라믹스의 구조 및 마이크로파 유전특성', 대한전기학회논문지, Vol. 50, No.5, pp. 226-231, 2001
  13. 이영희 등, '$0.15(Ba_{0.95}Sr_{0.05}O-0.15Sm_2O_3-0.7TiO_2$ 세라믹스의 마이크로파 유전특성', 한국전기전자재료학회지, Vol.8, No.2, pp. 224-228, 1995
  14. N.Ida, 'Microwave NDT', Kluwer Academic Publisher, 1990
  15. R. Christoffersen, P. K. Davies and X. Wei, 'Effect og Sn Substitution on Cation Ordering in $(Zr_{1-x}Sn_x)TiO_4$ Microwave Dielectric Ceramics', J. Am. Ceram. Soc., 77(6), pp.1441-1450, 1994
  16. S. Nishigaki, S. Yono and H. Kato, 'BaO-$TiO_2-WO_3$ Microwave Ceramics and Crystalline $BaWO_4$', J. Am. Ceram. Soc., 71(1), C-11-17, 1988
  17. N. Negas, G. Yeager, S. Bell, and R. Amren, 'Chemistry and properties of temperature compensated microwave dielectrics'. NIST spec. publ. 804. in Chemistry of Electronic Ceramic Materials, pp.21, 1991