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Microstructural, ferroelectric, and dielectric properties of Bi3.15Nd0.85Ti3O12 ceramics

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5 Author(s)
Qi, Y.J. ; Department of Physics, Hubei University, Wuhan, Hubei 430062, People’s Republic of China ; Xiao, X. ; Lu, C.J. ; Mao, X.Y.
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Dense Bi3.15Nd0.85Ti3O12 (BNdT) ceramics of a layered perovskite structure were sintered at 1100 °C by solid state reaction. Ferroelectric domains were probably observed in plate-shaped grains. The BNdT ceramics exhibit saturated ferroelectric hysteresis loops with a remanent polarization (2Pr) of 45 μC/cm2 and a coercive field of 67.6 kV/cm. The dielectric constant and dissipation factor of the ceramics at 100 kHz are 221 and 0.0064, respectively. A broad dielectric peak was observed around 408 °C, and it might come from the oxygen-vacancy-related dielectric relaxation. The leakage current density of the ceramics is less than 7.5×10-7 A/cm2 under an applied field below 239 kV/cm. The BNdT ceramics show Schottky emission behavior under low electric field below 75 kV/cm.

Published in:

Journal of Applied Physics  (Volume:98 ,  Issue: 9 )

Date of Publication:

Nov 2005

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