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Improved Pyroelectric Properties of CaBi4Ti4O15 Ferroelectrics Ceramics by Nb/Mn Co-Doping for Pyrosensors

Journal Article


Abstract


  • The pyroelectric properties of Nb(Mn)-doped and Nb/Mn co-doped CaBi4Ti4O15 (CBT) bismuth layer-structured ferroelectric ceramics were investigated. It was found that Nb/Mn co-doping resulted in stronger enhancement of pyroelectric properties than that of single Nb or Mn doping. The mechanism of doping effect was explained by the distortion of the [BO6] octahedra induced by the doped Nb and Mn cations occupying the B-site of the pseudoperovskite structure. A large pyroelectric coefficient of 84.4 μC/m2K was obtained at room temperature for Nb/Mn co-doped CBT (CBTN-Mn) ceramics, higher than that of pure, Nb or Mn-doped counterparts, being on the order of 35.9, 58.2, 44.0 μC/m2K, respectively. The enhanced pyroelectric coefficient together with reduced dielectric constant (99) and dielectric loss (0.002) led to greater improvement of figures of merit (FOMs), including FOMs for voltage responsivity (Fv ~ 3.95 × 10−2 m2/C) and detectivity (Fd ~ 2.44 × 10−5 Pa−1/2), in CBTN-Mn ceramics. Furthermore, the temperature variations of Fv and Fd were found to be 24% and 68%, respectively, over a broad temperature range from room temperature to 350°C, making CBTN-Mn ceramics potential candidate for high-temperature pyroelectric devices.

UOW Authors


  •   Tang, Yanxue (external author)
  •   Shen, Zongyang (external author)
  •   Zhang, Shujun
  •   Shrout, Thomas R. (external author)

Publication Date


  • 2016

Citation


  • Tang, Y., Shen, Z., Zhang, S. & Shrout, T. R. (2016). Improved Pyroelectric Properties of CaBi4Ti4O15 Ferroelectrics Ceramics by Nb/Mn Co-Doping for Pyrosensors. Journal of the American Ceramic Society, 99 (4), 1294-1298.

Scopus Eid


  • 2-s2.0-84955446995

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2838

Number Of Pages


  • 4

Start Page


  • 1294

End Page


  • 1298

Volume


  • 99

Issue


  • 4

Place Of Publication


  • United States

Abstract


  • The pyroelectric properties of Nb(Mn)-doped and Nb/Mn co-doped CaBi4Ti4O15 (CBT) bismuth layer-structured ferroelectric ceramics were investigated. It was found that Nb/Mn co-doping resulted in stronger enhancement of pyroelectric properties than that of single Nb or Mn doping. The mechanism of doping effect was explained by the distortion of the [BO6] octahedra induced by the doped Nb and Mn cations occupying the B-site of the pseudoperovskite structure. A large pyroelectric coefficient of 84.4 μC/m2K was obtained at room temperature for Nb/Mn co-doped CBT (CBTN-Mn) ceramics, higher than that of pure, Nb or Mn-doped counterparts, being on the order of 35.9, 58.2, 44.0 μC/m2K, respectively. The enhanced pyroelectric coefficient together with reduced dielectric constant (99) and dielectric loss (0.002) led to greater improvement of figures of merit (FOMs), including FOMs for voltage responsivity (Fv ~ 3.95 × 10−2 m2/C) and detectivity (Fd ~ 2.44 × 10−5 Pa−1/2), in CBTN-Mn ceramics. Furthermore, the temperature variations of Fv and Fd were found to be 24% and 68%, respectively, over a broad temperature range from room temperature to 350°C, making CBTN-Mn ceramics potential candidate for high-temperature pyroelectric devices.

UOW Authors


  •   Tang, Yanxue (external author)
  •   Shen, Zongyang (external author)
  •   Zhang, Shujun
  •   Shrout, Thomas R. (external author)

Publication Date


  • 2016

Citation


  • Tang, Y., Shen, Z., Zhang, S. & Shrout, T. R. (2016). Improved Pyroelectric Properties of CaBi4Ti4O15 Ferroelectrics Ceramics by Nb/Mn Co-Doping for Pyrosensors. Journal of the American Ceramic Society, 99 (4), 1294-1298.

Scopus Eid


  • 2-s2.0-84955446995

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2838

Number Of Pages


  • 4

Start Page


  • 1294

End Page


  • 1298

Volume


  • 99

Issue


  • 4

Place Of Publication


  • United States