본문 바로가기
KCI 등재

Electrically tunable dielectric properties of Ba0.6Sr0.4TiO3-MgO composite ceramics.

Journal of Ceramic Processing Research
약어 : J. Ceram. Process. Res.
2013 vol.14, no.3, pp.430 - 435
DOI : 10.36410/jcpr.2013.14.3.430
발행기관 : 한양대학교 청정에너지연구소
연구분야 : 재료공학
Copyright © 한양대학교 청정에너지연구소
Xiao-Fei Zhang 1

1Hubei Ploytechnic University

6 회 열람

40 wt.% Ba0.6Sr0.4TiO3-60 wt.% MgO composite ceramics were prepared from Ba0.6Sr0.4TiO3 powder synthesized by a citrate method and fine MgO powder. The composite ceramics sintered at 1150-1270 o C attained reasonable densification. The structure and dielectric properties of the specimens were investigated. The results showed an important role of sintering temperature in controlling the microstructure and dielectric properties of the specimens. Sintering at 1250 o C was determined to be preferred in terms of the nonlinear dielectric properties of the specimens under bias electric field. The specimen sintered at 1250 o C attained a dielectric constant (εr) of 207 and a dielectric loss (tanδ) of 0.11% at 10 kHz together with a tunability of 18.5% and a figure of merit (FOM) of 168 at 10 kHz and 30 kV/cm. It was found that the nonlinear dielectric properties of the specimen measured in continuous cycles of bias electric field sweep were dependent on field history. The phenomenon is qualitatively explained in relation to the polarization reorientation of polar nano-regions (PNRs) in Ba0.6Sr0.4TiO3 phase of the composite specimen.

Ba0.6Sr0.4TiO3-MgO, Composite ceramics, Nonlinear dielectric properties, Microstructure

  • 1. [학술지] L.C. Sengupta / 1999 / / Mater. Res. Innovations / 2 : 278 ~
  • 2. [학술지] A.K. Tagantsev / 2003 / / J. Electroceram / 11 : 5 ~
  • 3. [학술지] L.B. Kong / 2010 / / Prog. Mater. Sci / 55 : 840 ~
  • 4. [학술지] W. Chang / 2002 / / J. Appl. Phys / 92 : 3941 ~
  • 5. [학술지] B. Su / 2004 / / J. Appl. Phys / 95 : 1382 ~
  • 6. [학술지] Y. Chen / 2005 / / J. Appl. Phys / 98 : 064107-1 ~
  • 7. [학술지] Y. Chen / 2010 / / J. Am. Ceram. Soc / 93 : 161 ~
  • 8. [학술지] X.J. Chou / 2007 / / Appl. Phys. Lett / 91 : 122908-1 ~
  • 9. [학술지] J.J. Zhang / 2008 / / J. Am. Ceram. Soc / 91 : 3258 ~
  • 10. [학술지] J.J. Zhang / 2008 / / J. Phys. D: Appl. Phys / 41 : 195405-1 ~
  • 11. [학술지] S.M. Ke / 2008 / / Compos. Part A-Appl. S / 39 : 597 ~
  • 12. [학술지] T. Hu / 2004 / / J. Am. Ceram. Soc / 87 : 578 ~
  • 13. [학술지] D. Zhang / 2007 / / J. Eur. Ceram. Soc / 27 : 1047 ~
  • 14. [학술지] X.F. Zhang / 2010 / / Ceram. Int / 36 : 1405 ~
  • 15. [학술지] X.F. Zhang / 2011 / / Physica B / 406 : 1571 ~
  • 16. [학술지] S. Agrawal / 2004 / / Ferroelectrics / 306 : 155 ~
  • 17. [학술지] A. Feteira / 2004 / / J. Am. Ceram. Soc / 87 : 1082 ~
  • 18. [학술지] X.F. Liang / 2003 / / Mater. Sci. Eng. B / 99 : 366 ~
  • 19. [학술지] J.J. Zhang / 2009 / / Acta Mater / 57 : 4491 ~
  • 20. [학술지] C. Ang / 2004 / / Phys. Rev. B / 69 : 174109-1 ~
  • 21. [학술지] K.M. Johnson / 1962 / / J. Appl. Phys / 33 : 2826 ~
  • 22. [학술지] J.W. Liou / 1997 / / Jpn. J. Appl. Phys / 36 : 4359 ~
  • 23. [학술지] K.F. Astafiev / 2003 / / J. Eur. Ceram. Soc / 23 : 2381 ~
  • 24. [학술지] J.W. Liou / 1997 / / J. Am. Ceram. Soc / 80 : 3093 ~