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Crystal Structure–microwave Dielectric Property Relations in R2BaZnO5 (R= Sm, Eu, Gd, Dy, Ho, Er, and Tm) Ceramics

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Abstract

R2BaZnO5 (R = Sm, Eu, Gd, Dy, Ho, Er, and Tm) were synthesized, and the effects of the differences in ionic radii of R ions on the microwave dielectric properties and crystal structure have been investigated by using x-ray powder diffraction It was shown that the R2BaZnO5compounds have an orthorhombic crystal structure with Pnma (No 62) and the lattice parameters of the samples increase linearly with the increase in the ionic radii of the R ions. The dielectric constants (εr) of R2BaZnO5sintered at the optimum temperatures vary linearly from 16.1 to 19.3, suggesting that these variations in εr are the result of the differences in the ionic polarizabilities of R ions. Moreover, it is suggested that the variations in the valences of R ions determined by using bond valence sum may exert an influence on quality factor (Qf ), because the values of valences of R ions in R(1)O7 polyhedra and Qf exhibit similar tendencies with changes in the ionic radii of R ions. In the R2O3–BaO–ZnO system, Dy2BaZnO5showed the appropriate microwave dielectric properties: εr = 17.1, Qf = 29669 GHz, and τf = −1.5 ppm/°C.

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References

  1. H.M. O’Bryan, P.K. Gallagher, G.W. Berkstresser, and C.D. Brandle, J. Mater. Res. 5, 183 (1990).

    Article  Google Scholar 

  2. D.C. Dube and H.J. Scheel, J. Appl. Phys. 75, 126 (1994).

    Article  Google Scholar 

  3. E.L. Colla, I.M. Reaney, and N. Setter, J. Appl. Phys. 74, 3414 (1993).

    Article  CAS  Google Scholar 

  4. V. Sivasubramanian, V.R.K. Murthy, and B. Viswanathan, Jpn. J. Appl. Phys. 36, 194 (1997).

    Article  CAS  Google Scholar 

  5. M.J. Lancaster, Passive Microwave Device Applications of High-Temperature Superconductor. (Cambridge University Press, Cambridge, United Kingdom, 1997).

    Book  Google Scholar 

  6. H. Takezoe, K. Kondo, A. Fukuda, and E. Kuze, Jpn. J. Appl. Phys. 21, L627 (1982).

  7. M. Watanabe, H. Ogawa, H. Ohsato, and C. Humphreys, Jpn. J. Appl. Phys. 37, 5360 (1998).

    Article  CAS  Google Scholar 

  8. C. Michel and B. Raveau, J. Solid State Chem. 43, 73 (1982).

    Article  CAS  Google Scholar 

  9. H. Ogawa, M. Watanabe, H. Ohsato, and C. Humphreys, Proceedings of the Eleventh IEEE International Symposium on Application of Ferroelectrics, ISAF 1998 (IEEE, Piscataway, NJ, 1998), p. 517.

    Google Scholar 

  10. H.M. Rietveld, J. Appl. Crystallogr. 2, 65 (1969).

    Article  CAS  Google Scholar 

  11. F. Izumi, in Rietveld Method, edited by R.A. Young (Oxford University Press, Oxford, United Kingdom, 1993), Chap. 13.

    Google Scholar 

  12. B.W. Hakki and P.D. Coleman, IRE Trans. Microwave Theory Tech. MTT–8, 402 (1960).

    Article  Google Scholar 

  13. R.D. Shannon, Acta. Crystallogr. A 32, 751 (1976).

    Article  Google Scholar 

  14. A. Salinas-Sanchez, J.L. Garcia-Munoz, J. Rodriguez-Carvajal, R. Saez-Puche, and J.L. Martinez, J. Solid State Chem. 100, 201 (1992).

    Article  CAS  Google Scholar 

  15. M. Tabi, J. Aride, J. Darriet, A. Moqine, and A. Boukhari, J. Solid State Chem. 86, 233 (1990).

    Article  Google Scholar 

  16. A. Kan, H. Ogawa, H. Ohsato, and S. Ishihara, J. Eur. Ceram. Soc. 21, 2593 (2001).

    Article  CAS  Google Scholar 

  17. S.Y. Cho, I.T. Kim, and K.S. Hong, J. Mater. Res. 14, 114 (1999).

    Article  CAS  Google Scholar 

  18. R.D. Shannon, J. Appl. Phys. 73, 348 (1993).

    Article  CAS  Google Scholar 

  19. S. Kucheiko, J.W. Choi, H.J. Kim, and H.J. Jung, J. Am. Ceram. Soc. 79, 2739 (1996).

    Article  CAS  Google Scholar 

  20. I.D. Brown and D. Altermatt, Acta Crystallogr. B 41, 244 (1985).

    Article  Google Scholar 

  21. N.E. Brese and M. O’keeffe, Acta Crystallogr. B 47, 192 (1991).

    Article  Google Scholar 

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  1. Faculty of Science and Technology, Meijo University, 1–501 Shiogamaguchi, 468-8502, Tempaku-ku, Nagoya, Japan

    Akinori Kan & Hirotaka Ogawa

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  1. Akinori Kan
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  2. Hirotaka Ogawa
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Kan, A., Ogawa, H. Crystal Structure–microwave Dielectric Property Relations in R2BaZnO5 (R= Sm, Eu, Gd, Dy, Ho, Er, and Tm) Ceramics. Journal of Materials Research 17, 1803–1807 (2002). https://doi.org/10.1557/JMR.2002.0267

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  • DOI: https://doi.org/10.1557/JMR.2002.0267

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