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Structure property relationship in BaTiO3-Na0.5Bi0.5TiO3-Nb2O5-NiO X8R system

Journal Article


Abstract


  • A novel BaTiO 3 -Na 0.5 Bi 0.5 TiO 3 -Nb 2 O 5 -NiO (BT-NBT-Nb-Ni) system that meets the X8R specification (-55°C-150°C, ΔC/C≤±15%) of multilayer ceramic capacitors (MLCCs) was fabricated, with a maximum dielectric constant of 2350 at room temperature (25°C). Core-shell microstructure was observed by transmission electron microscopy (TEM), accounting for the good dielectric temperature stability. The role of Ni on the formation of core-shell structure and phase structure, and the subsequent relationship between structure and dielectric/ionic conduction properties were investigated. It was observed that the addition of Ni could adjust the ratio of core/shell, and significantly reduces the dielectric loss over the studied temperature range. A new Ba 11 (Ni, Ti) 28 O 66+x phase with a 10-layer close-packed structure was identified by X-ray diffraction (XRD), serving as a source of oxygen vacancies for ionic conduction in addition to Ba(Ni,Ti)O 3 . Furthermore, the impedance spectroscopy measurements demonstrated the remarkable impact of these Ni-induced oxygen vacancies on both the grain and grain-boundary conductivities.

UOW Authors


  •   Sun, Yue (external author)
  •   Liu, Hanxing (external author)
  •   Hao, Hua (external author)
  •   Song, Zhe (external author)
  •   Zhang, Shujun

Publication Date


  • 2015

Citation


  • Sun, Y., Liu, H., Hao, H., Song, Z. & Zhang, S. (2015). Structure property relationship in BaTiO3-Na0.5Bi0.5TiO3-Nb2O5-NiO X8R system. Journal of the American Ceramic Society, 98 (5), 1574-1579.

Scopus Eid


  • 2-s2.0-85027932838

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3027

Number Of Pages


  • 5

Start Page


  • 1574

End Page


  • 1579

Volume


  • 98

Issue


  • 5

Place Of Publication


  • United States

Abstract


  • A novel BaTiO 3 -Na 0.5 Bi 0.5 TiO 3 -Nb 2 O 5 -NiO (BT-NBT-Nb-Ni) system that meets the X8R specification (-55°C-150°C, ΔC/C≤±15%) of multilayer ceramic capacitors (MLCCs) was fabricated, with a maximum dielectric constant of 2350 at room temperature (25°C). Core-shell microstructure was observed by transmission electron microscopy (TEM), accounting for the good dielectric temperature stability. The role of Ni on the formation of core-shell structure and phase structure, and the subsequent relationship between structure and dielectric/ionic conduction properties were investigated. It was observed that the addition of Ni could adjust the ratio of core/shell, and significantly reduces the dielectric loss over the studied temperature range. A new Ba 11 (Ni, Ti) 28 O 66+x phase with a 10-layer close-packed structure was identified by X-ray diffraction (XRD), serving as a source of oxygen vacancies for ionic conduction in addition to Ba(Ni,Ti)O 3 . Furthermore, the impedance spectroscopy measurements demonstrated the remarkable impact of these Ni-induced oxygen vacancies on both the grain and grain-boundary conductivities.

UOW Authors


  •   Sun, Yue (external author)
  •   Liu, Hanxing (external author)
  •   Hao, Hua (external author)
  •   Song, Zhe (external author)
  •   Zhang, Shujun

Publication Date


  • 2015

Citation


  • Sun, Y., Liu, H., Hao, H., Song, Z. & Zhang, S. (2015). Structure property relationship in BaTiO3-Na0.5Bi0.5TiO3-Nb2O5-NiO X8R system. Journal of the American Ceramic Society, 98 (5), 1574-1579.

Scopus Eid


  • 2-s2.0-85027932838

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3027

Number Of Pages


  • 5

Start Page


  • 1574

End Page


  • 1579

Volume


  • 98

Issue


  • 5

Place Of Publication


  • United States