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The temperature-dependent piezoelectric and electromechanical properties of cobalt-modified sodium bismuth titanate

Journal Article


Abstract


  • Lightly cobalt-modified, Aurivillius-type, sodium bismuth titanate (Na0.5Bi4.5Ti4O15, NBT) ceramics were synthesized by substituting a small amount of cobalt ions onto the Ti4+ sites using conventional solid-state reaction. X-ray photoelectron spectroscopy (XPS) analysis coupled with bond valence sum calculations show that the dopant cobalt ions substitute for Ti4+ ions in the form of Co3+. The resultant cobalt-modified NBT ceramics (NBT-Co) exhibit better piezoelectric and electromechanical properties by comparison with pure NBT. With only 0.3 wt% Co3+ substitution, the piezoelectric properties of the NBT-Co ceramics are optimal, exhibiting a high piezoelectric coefficient (d33~33 pC/N), a low dielectric loss tan δ (~0.1% at 1 kHz), a high thickness planar coupling coefficient (kt~34%) as well as a high Curie temperature (Tc~663 °C). Such NBT-Co ceramics exhibit nearly temperature-independent piezoelectric and electromechanical properties up to 400 °C, suggesting that these cobalt-modified NBT ceramics are promising materials for high temperature piezoelectric applications.

UOW Authors


  •   Wang, Chun Ming. (external author)
  •   Zhao, Liang (external author)
  •   Liu, Yun (external author)
  •   Withers, R L (external author)
  •   Zhang, Shujun
  •   Wang, Qian (external author)

Publication Date


  • 2016

Citation


  • Wang, C., Zhao, L., Liu, Y., Withers, R. L., Zhang, S. & Wang, Q. (2016). The temperature-dependent piezoelectric and electromechanical properties of cobalt-modified sodium bismuth titanate. Ceramics International, 42 (3), 4268-4273.

Scopus Eid


  • 2-s2.0-84951910718

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2855

Number Of Pages


  • 5

Start Page


  • 4268

End Page


  • 4273

Volume


  • 42

Issue


  • 3

Place Of Publication


  • United Kingdom

Abstract


  • Lightly cobalt-modified, Aurivillius-type, sodium bismuth titanate (Na0.5Bi4.5Ti4O15, NBT) ceramics were synthesized by substituting a small amount of cobalt ions onto the Ti4+ sites using conventional solid-state reaction. X-ray photoelectron spectroscopy (XPS) analysis coupled with bond valence sum calculations show that the dopant cobalt ions substitute for Ti4+ ions in the form of Co3+. The resultant cobalt-modified NBT ceramics (NBT-Co) exhibit better piezoelectric and electromechanical properties by comparison with pure NBT. With only 0.3 wt% Co3+ substitution, the piezoelectric properties of the NBT-Co ceramics are optimal, exhibiting a high piezoelectric coefficient (d33~33 pC/N), a low dielectric loss tan δ (~0.1% at 1 kHz), a high thickness planar coupling coefficient (kt~34%) as well as a high Curie temperature (Tc~663 °C). Such NBT-Co ceramics exhibit nearly temperature-independent piezoelectric and electromechanical properties up to 400 °C, suggesting that these cobalt-modified NBT ceramics are promising materials for high temperature piezoelectric applications.

UOW Authors


  •   Wang, Chun Ming. (external author)
  •   Zhao, Liang (external author)
  •   Liu, Yun (external author)
  •   Withers, R L (external author)
  •   Zhang, Shujun
  •   Wang, Qian (external author)

Publication Date


  • 2016

Citation


  • Wang, C., Zhao, L., Liu, Y., Withers, R. L., Zhang, S. & Wang, Q. (2016). The temperature-dependent piezoelectric and electromechanical properties of cobalt-modified sodium bismuth titanate. Ceramics International, 42 (3), 4268-4273.

Scopus Eid


  • 2-s2.0-84951910718

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2855

Number Of Pages


  • 5

Start Page


  • 4268

End Page


  • 4273

Volume


  • 42

Issue


  • 3

Place Of Publication


  • United Kingdom