TY - JOUR
T1 - Improved Pyroelectric Properties of CaBi 4 Ti 4 O 15 Ferroelectrics Ceramics by Nb / Mn Co-Doping for Pyrosensors
AU - Tang, Yanxue
AU - Shen, Zong Yang
AU - Zhang, Shujun
AU - Shrout, Thomas R.
N1 - Funding Information:
This work is supported by the Science and Technology Commission of Shanghai Municipality (grant no. 13ZR1430200). The author (Y. X. Tang) thank the China Scholarship Council for the financial support of exchange scholar. The author (Z. Y. Shen) thank the financial support of Young Scientists Cultivation Program of Jiangxi Province (20142BCB23020) and Science Foundation of Jiangxi Provincial Department of Education (KJLD13076).
Publisher Copyright:
© 2016 The American Ceramic Society.
PY - 2016/4/1
Y1 - 2016/4/1
N2 - 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.
AB - 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.
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U2 - 10.1111/jace.14075
DO - 10.1111/jace.14075
M3 - Article
AN - SCOPUS:84955446995
SN - 0002-7820
VL - 99
SP - 1294
EP - 1298
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 4
ER -