@article{8160dbfc3ed940ceb13cce6d72933f86,
title = "Electromechanical properties of A -site (LiCe)-modified sodium bismuth titanate (Na0.5Bi4.5Ti4O15) piezoelectric ceramics at elevated temperature",
abstract = "The Aurivillius-type bismuth layer-structured (NaBi)0.46(LiCe) 0.04Bi4Ti4O15 (NBT-LiCe) piezoelectric ceramics were synthesized using conventional solid-state processing. Phase analysis was performed by x-ray diffraction and microstructural morphology was assessed by scanning electron microscopy. The dielectric, piezoelectric, ferroelectric, and electromechanical properties of NBT-LiCe ceramics were investigated. The piezoelectric activities were found to be significantly enhanced compared to NBT ceramics, which can be attributed to the lattice distortion and the presence of bismuth vacancies. The dielectric and electromechanical properties of NBT-LiCe ceramics at elevated temperature were investigated in detail. The excellent piezoelectric, dielectric, and electromechanical properties, coupled with high Curie temperature (Tc =660 °C), demonstrated that the NBT-LiCe ceramics are the promising candidates for high temperature applications.",
author = "Wang, {Chun Ming} and Wang, {Jin Feng} and Shujun Zhang and Shrout, {Thomas R.}",
note = "Funding Information: This research was supported by the Outstanding Youth Scientist Research Foundation of Shandong Province of China under Grant No. 2008BS04002 and the Specialized Research Fund for the Doctoral Program of Higher Education of China under Grant Nos. 20070422059 and 20080422003, and the National Natural Science Foundation of China under the Grant No. 50702030. We also acknowledge the support of the National Institutes of Health (NIH) under grant No. P41-RR11795. The author CMW acknowledge the support of the Postdoctoral Science Foundation of China under Grant No. 20080431199. FIG. 1. XRD patterns of the NBT-LiCe piezoelectric ceramics. Inset shows the SEM photograph of the NBT-LiCe sample. FIG. 2. Temperature dependence of dielectric permittivity and dielectric loss tan δ of the NBT-LiCe ceramics. FIG. 3. Temperature dependence of electrical resistivity of the NBT and NBT-LiCe ceramics FIG. 4. The P - E hysteresis loops of the NBT-LiCe ceramics at a maximum drive field. FIG. 5. Electrical impedance modulus as a function of frequency at various temperatures. FIG. 6. Electrical impedance modulus as a function of frequency at high temperatures. Inset shows the resonance f r and antiresonance f a as a function of temperature. FIG. 7. Electromechanical coupling factors k p and k t as a function of temperature. FIG. 8. Mechanical quality factor Q m as a function of temperature. FIG. 9. Effect of annealing temperature for 1 h on the piezoelectric coefficient d 33 of the NBT-LiCe piezoelectric ceramics. ",
year = "2009",
doi = "10.1063/1.3117219",
language = "English (US)",
volume = "105",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics",
number = "9",
}