The Transactions of the Korean Institute of Electrical Engineers C (대한전기학회논문지:전기물성ㆍ응용부문C)

The Korean Institute of Electrical Engineers (대한전기학회)
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Microwave Dielectric Properties of the $MgTiO_3-SrTiO_3$ Ceramics

$MgTiO_3-SrTiO_3$ 세라믹스의 마이크로파 유전특성

  • Published : 2001.08.01
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Abstract

The(1-x) MgTiO$_3$-xSrTiO$_3$(x=0.03~0.04) ceramics were fabricated by the conventional mixed oxide method. The structural and microwave dielectric properties were investigated by XRD, SEM, EDS and network analyzer. The sintering temperature and time were 1275$^{\circ}C$~135$0^{\circ}C$ and 2hours, respectively. In the XRD results of 0.96MgTiO$_3$-0.04SrTiO$_3$ceramics, the perovskite structure of SrTiO$_3$and ilmenite structure of MgTiO$_3$phase were coexisted. The dielectric constant($\varepsilon$(sub)${\gamma}$) and temperature coefficient of resonant frequency($\tau$(sub)f) were increased with addition of SrTiO$_3$. In thie case of 0.96MgTiO$_3$-0.04SrTiO$_3$ ceramics sintered at 13$25^{\circ}C$, the dielectric constant, quality factor(Q) and temperature coefficient of resonant frequency($\tau$(sub)f) were 20.13, 7956(at 7.27GHz), and +1.76ppm/$^{\circ}C$, respectively.

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References

  1. 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
  2. N.Ida, 'Microwave NDT', Kluwer Academic Publisher, 1990
  3. O. Renoult et al., 'Sol-Gel Processing and Microwave Characteristics of $Ba(Mg_{1/3}Ta_{2/3})O_3$Dielectrics', J. Am. Ceram. Soc., Vol. 75, No.12, pp.3337-3340, 1992 https://doi.org/10.1111/j.1151-2916.1992.tb04430.x
  4. V. M. Ferreira et al., 'The effect of Cr and La on MgTiO₃and MgTiO₃-CaTiO₃microwave dielectric ceramics', J. Mater. Res., Vol. 12, No.12, pp. 3293-3299, 1997
  5. 이영희 등,'소결온도와 Sr몰비에 따른 $Mg_{1-x}Sr_xTiO_3$세라믹스의 구조 및 마이크로파 유전특성', 대한전기학회 논문지, Vol.50, No.5, pp.226-231, 2001
  6. T. Hirata, K. Ishioka, M. Kitajima, 'Vibrational Spectroscopy and X-Ray Diffraction of Perovskite Compounds $Sr_{1-x}M_xTiO_3(M=Ca,\;Mg;0{\le}x{\le}1)$', Journal of Solid State Chemistry, Vol.124, pp.353-359, 1996 https://doi.org/10.1006/jssc.1996.0249
  7. M. Furuya et al., 'Microwave Dielectric Properties for $Ba(Mg_{1/3}Ta_{2/3})O_3-A(Mg_{1/2}W_{1/2})O_3$(A=Ba, Sr and Ca) Ceramics', Jpn. J .Appl. Phys., Vol.33, No.9B, pp.5482-5487, 1994 https://doi.org/10.1143/JJAP.33.5482
  8. B. W. Hakki et al., 'A Dielectric Resonator Method of Measuring Inductive Capacities in the Millimeter Range', IRE Trans. on Microwave Theory and Techniques, Vol.MTT-24, No.10, pp.402-410, 1960
  9. 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, pp.586-592, 1985
  10. 이영희 등, '소결온도에 따른 $0.9MgTiO_3-0.1SrTiO_3$ 세라믹스의 구조 및 마이크로파 유전특성', 대한전기학회논문지, Vol.49, No.5, pp.294-298, 2000
  11. 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, pp1599-1605, 1990 https://doi.org/10.1111/j.1151-2916.1990.tb09802.x
  12. M. Onoda, '$Ba(Zn_{1/3}Nb_{2/3})O_3-Sr(Zn_{1/3}Nb_{2/3})O_3$ Solid Solution Ceramics with Temperature-Stable, High Dielectric Constant and Low Microwave Loss', Jpn J. Appl., Vol.21, No.12, pp.908-911, 1982