Microstructural, ferroelectric, and dielectric properties of Bi{sub 3.15}Nd{sub 0.85}Ti{sub 3}O{sub 12} ceramics

Journal Article · Tue Nov 01 04:00:00 EST 2005 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.2103418· OSTI ID:20719665

Qi, Y J; Xiao, X; Lu, C J; Mao, X Y; Chen, X B ^[1]

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1. Department of Physics, Hubei University, Wuhan, Hubei 430062 (China)

Dense Bi{sub 3.15}Nd{sub 0.85}Ti{sub 3}O{sub 12} (BNdT) ceramics of a layered perovskite structure were sintered at 1100 deg. 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 (2P{sub r}) of 45 {mu}C/cm{sup 2} 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 deg. C, and it might come from the oxygen-vacancy-related dielectric relaxation. The leakage current density of the ceramics is less than 7.5x10{sup -7} A/cm{sup 2} under an applied field below 239 kV/cm. The BNdT ceramics show Schottky emission behavior under low electric field below 75 kV/cm.

• OSTI ID: 20719665
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 9 Vol. 98; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH COMPOUNDS
CERAMICS
CURRENT DENSITY
DIELECTRIC MATERIALS
DISSIPATION FACTOR
ELECTRIC FIELDS
HYSTERESIS
KHZ RANGE 01-100
LEAKAGE CURRENT
MICROSTRUCTURE
NEODYMIUM COMPOUNDS
OXYGEN
PERMITTIVITY
PEROVSKITE
POLARIZATION
RELAXATION
SCHOTTKY EFFECT
SINTERING
TITANATES
VACANCIES