Polarization and leakage current properties of bismuth sodium titanate ceramic films deposited by aerosol deposition method

Abstract

(Bi0.5Na0.5)TiO3 (BNT) dense ceramic films with a thickness of approximately 25 μm were deposited by an aerosol deposition method, and thieir ferroelectric and leakage current properties were investigated. The BNT films annealed at 1100°C represented the leakage current density (J) of 10-6 A/cm2, while the BNT films annealed at 800 and 1000°C led to a marked decrease in J. The J of order of 10-7 A/cm2 was obtained for the films annealed at 1000°C. The ceramic films annealed at 1000°C showed a remanent polarization (Pr) of 27μC/cm2 which was larger than that of the ceramic films annealed at 800°C (a Pr of 7.4 μC/cm2). © 2010 The Ceramic Society of Japan. All rights reserved.