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Mechanism of the giant permittivity in Sm modified SrTiO3sintered at different atmospheres

Journal Article


Abstract


  • The pure and Sm modified SrTiO 3 ceramics have been fabricated by solid state reaction method at different atmospheres, including ambient, reduced and oxidized conditions. All studied ceramics are in single cubic perovskite phase with high bulk density, where Sm doped ceramics possess decreased grain size. The room temperature permittivities of Sr 0.97 Sm 0.02 TiO 3 and Sr 0.98 Sm 0.02 TiO 3 sintered in N 2 were found to be on the order of 25120 and 13370 at 1 kHz with dielectric loss being 0.044 and 0.008. The giant permittivities were associated with the increase of Ti 3+ ions, which were due to the combination of Ti 4+ ions and electrons. With increasing Ti 3+ ions, the concentration of Ti 4+ ions, Ti 3+ ions and (Formula presented.) reach the balance where the defect dipoles [(Formula presented.)] were created, responsible for the low dielectric loss.

UOW Authors


  •   Huang, Xindi (external author)
  •   Liu, Hanxing (external author)
  •   Zhang, Shujun
  •   Li, Guangyao (external author)
  •   Hao, Hua (external author)
  •   Cao, Minghe (external author)
  •   Yao, Zhonghua (external author)
  •   Xie, Juan (external author)

Publication Date


  • 2018

Citation


  • Huang, X., Liu, H., Zhang, S., Li, G., Hao, H., Cao, M., Yao, Z. & Xie, J. (2018). Mechanism of the giant permittivity in Sm modified SrTiO3sintered at different atmospheres. Journal of Materials Science: Materials in Electronics, 29 (13), 11546-11552.

Scopus Eid


  • 2-s2.0-85047787415

Number Of Pages


  • 6

Start Page


  • 11546

End Page


  • 11552

Volume


  • 29

Issue


  • 13

Place Of Publication


  • United States

Abstract


  • The pure and Sm modified SrTiO 3 ceramics have been fabricated by solid state reaction method at different atmospheres, including ambient, reduced and oxidized conditions. All studied ceramics are in single cubic perovskite phase with high bulk density, where Sm doped ceramics possess decreased grain size. The room temperature permittivities of Sr 0.97 Sm 0.02 TiO 3 and Sr 0.98 Sm 0.02 TiO 3 sintered in N 2 were found to be on the order of 25120 and 13370 at 1 kHz with dielectric loss being 0.044 and 0.008. The giant permittivities were associated with the increase of Ti 3+ ions, which were due to the combination of Ti 4+ ions and electrons. With increasing Ti 3+ ions, the concentration of Ti 4+ ions, Ti 3+ ions and (Formula presented.) reach the balance where the defect dipoles [(Formula presented.)] were created, responsible for the low dielectric loss.

UOW Authors


  •   Huang, Xindi (external author)
  •   Liu, Hanxing (external author)
  •   Zhang, Shujun
  •   Li, Guangyao (external author)
  •   Hao, Hua (external author)
  •   Cao, Minghe (external author)
  •   Yao, Zhonghua (external author)
  •   Xie, Juan (external author)

Publication Date


  • 2018

Citation


  • Huang, X., Liu, H., Zhang, S., Li, G., Hao, H., Cao, M., Yao, Z. & Xie, J. (2018). Mechanism of the giant permittivity in Sm modified SrTiO3sintered at different atmospheres. Journal of Materials Science: Materials in Electronics, 29 (13), 11546-11552.

Scopus Eid


  • 2-s2.0-85047787415

Number Of Pages


  • 6

Start Page


  • 11546

End Page


  • 11552

Volume


  • 29

Issue


  • 13

Place Of Publication


  • United States