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Microwave Dielectric Characteristics of Ba(Mg1/3Nb2/3)O3-La(Mg2/3Nb1/3)O3 Ceramics with Crystal Structure

결정 구조에 따른 Ba(Mg1/3Nb2/3)O3-La(Mg2/3Nb1/3)O3세라믹스의 마이크로파 유전 특성

  • 백종후 (요업기술원 전자소재기술개발사업단) ;
  • 임은경 (요업기술원 전자소재기술개발사업단) ;
  • 이미재 (요업기술원 전자소재기술개발사업단) ;
  • 지미정 (요업기술원 전자소재기술개발사업단) ;
  • 최병현 (요업기술원 전자소재기술개발사업단) ;
  • 김세기 (요업기술원 전자소재기술개발사업단)
  • Published : 2005.01.01

Abstract

The microwave dielectric properties and their related structural characteristics in solid solutions of (1-$\chi$) Ba($Mg_{1/3}$Nb$_{2/3}$) $O_3$-$\chi$La(Mg$_{2/3}$Nb$_{1}$3) $O_3$(BLMN) have been investigated by measuring the dielectric constant($\varepsilon$r), Q value and temperature coefficient of resonant frequency($\tau$f) and by observing the crystal structure using high resolution transmission electron microscopy (HRTEM). Microwave dielectric properties showed characteristic features for specific composition. Dielectric constant($\varepsilon$$_{r}$) showed maximum value at the composition which corresponds to the phase boundary between 1 : 2 ordered and 1 : 1 ordered structure. The increase in $\varepsilon$$_{r}$ may be caused by the rattling of ions by incorporating smaller ions and the disordered structure. The variation of temperature coefficient of resonant frequency($\tau$$_{f}$) was investigated in terms of oxygen octahedra tilting.dra tilting.

References

  1. K. Wakino, 'Recent Development of Dielectric Resonator Materials and Filter in Japan', Ferroelectrics 91, p. 69, 1989
  2. 최지원, 하종윤, 안병국, 윤석진, 김현재, '결정구조와 이온 분극율에 따른$ (Al,\;Mg,\;Ta)_2$ 고용체의 마이크로파 유전상수 특성', 전기전자재료학회논문지, 16권,2호 p. 108, 2003
  3. T. Nagai and M. Sugiyama, 'Contribution of dielectrics constant to change in temperature coefficient of resonant frequency in $(Ba_{1-x}Sr_x)(Mg_{1/3}Ta_{2/3})O_3$ compound', Jap. J. Appl. Phys., Vol. 31, No. 9B, p. 3132, 1992 https://doi.org/10.1143/JJAP.31.3132
  4. K. Kageyama, 'Crystal structure and microwave dielectrics of $Ba(Zn_{1/3}Ta_{2/3})O_3-(Sr,Ba)(Ga_{1/2}Ta_{1/2})O_3$', J. Am. Ceram. Soc., Vol. 75, No. 7, p. 1767, 1992 https://doi.org/10.1111/j.1151-2916.1992.tb07195.x
  5. T. Nagai, M. Sugiyama, M. Sando, and K.Nihara, 'Structural changes in $Ba(Sr_{1/3}Ta_{2/3})O_3$-type perovskite compounds upon tilting of oxygen octahedra', Jpn. J. Appl. Phys., Vol. 36, No. 3A, p. 1146, 1997
  6. S. Y. Cho, K S. Hong, and S. J, Park, 'Influence of ZnO evaporation on microwave dielectric properties of $La(Zn_{1/2}Ti_{1/2})O_3$', Mater. Res. Bull., Vol. 32, No. 6, p. 725, 1997
  7. A. M. Glazer, 'Simple Ways of Determining Perovskite Structures', Acta. Cryst, A31, p. 756, 1975
  8. B. W. Hakki and P. D. Coleman, 'A Dielectric Resonator Method of Measuring Inductive Capacities in the Millimeter Range', IRE Trans. Micro Theory Tech., MTT-8, p. 402, 1960
  9. 백종후, 이미재, 최병현, 지미정, 임은경, 남산 '$Ba(Mg_{1/3}Nb_{2/3})O_3-La(Mg_{2/3}Nb_{1/3})O_3$ 복합 페로브스카이트 화합물의 결정구조', 전기전자재료학회논문지 , 17권,7호, p. 718, 2004
  10. 백종후, 이미재, 최병현, 김효태, 지미정, 임은경, 남 산, 이학주, 'Mg 결핍에 따른 $Ba(Mg_{1/3}Nb_{2/3})O_3$ 세라믹스의 마이크로파 유전특성', 전기전자재료학회논문지, 17권,4호, p. 384, 2004
  11. K. Park, M. Wuttig, and D. Viehland, 'Ordering in the lead magnesium niobate solid solutions', J. Mater. Sci., Vol. 29, p. 1284, 1994
  12. K. Unicho and L.E. Cross, 'Elastic constant and thermal expansion of cation disordered perovskites', Jpn. J. Appl. Phys., Vol. 19, No. 7, p. L398, 1980
  13. H. Ikawa, M Touma, and O. Fukunaga, 'Change in paraelectric properties of a-site ion of perovskite oxide', Electroceramics V, vol 2, p. 41, 1996
  14. E. E. Havinga and A. J. Bosman, 'Temperature dependance of dielectric constant of cubic ionic compounds', Phy, Rev., Vol. 129, No.4, p. 1593, 1963
  15. E. L. Colla, I. M. Reaney, and N. Setter, 'Effect of structural change in perovskite on temperature coefficient of the rrelative permittivity', J. Appl. Phys., Vol. 74, No.5, p. 3414, 1993
  16. I. M. Reaney, E. L. Colla, and N. Setter, 'Dielectric and structural characteristics of Ba- and Sr-based complex perovskites as a function of tolerance factor', Jpn. J. Appl. Phys., Vol. 33, p. 3984, 1994
  17. T. Nagai and M. Sugiyama, 'Anomaly of dielectrics constant of $(Ba_{1-x}Sr_x)(Mg_{1/3}Ta_{2/3})O_3$ solid solution and its relation to structural change', Jap. J. Appl, Phys., Vol. 32, No. 9B, p. 4360, 1993 https://doi.org/10.1143/JJAP.32.4360
  18. V. M. Ferreira and J. Petzelt, 'Dielectric spectroscopy of $MgTiO_3$-based ceramics', J. Mater. Sci., Vol. 28, p. 5894, 1993
  19. H. J. Youn, K. S. Hong, and H. Kim, 'Coexistence of 1: 2 and 1: 1 long range ordering types in the la-rnodified $Ba(Mn_{0.33}Ta_{0.67})O_3$ Ceramics', J. Mater. Res., Vol. 12, No. 3, p. 589, 1996