Abstract
A single phase BaTiO3 ceramic was prepared by traditional solid-state sintering process at 1220 °C for 4 h. XRD analysis results show that the obtained sample is tetragonal phase BaTiO3, the space group belongs to P4mm (No. 99). Lattice vibrational characteristics of BaTiO3 ceramic were revealed according to Raman and far-infrared spectroscopy. By fitting far infrared data with 4-P model, the dielectric constant (εr) of BaTiO3 ceramic is 20.0782, while its dielectric loss (tanδ) is 19.9756 × 10−4. The peak at 181 cm−1 has the greatest impact on the dielectric constant and dielectric loss. The theoretical dielectric properties of BaTiO3 ceramic were calculated by C–M and damping formulas, which εr = 20.1030 and tanδ = 19.1672 × 10−4. However, the theoretical data are too far different from the tested data, which is because the asymmetrical structure inside the tetragonal phase BaTiO3 generates spontaneously polarize along the C axis, forming a ferroelectric domain and resulting in an increase in the dielectric constants, and thus the dielectric loss also increases.
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This work was supported by National Natural Science Foundation of China (Grant 11874240), Shandong Provincial Key Research and Development Program, China (No. 2019GGX101060).
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Wang, L., Lv, J., Shi, F. et al. Intrinsic dielectric properties and lattice vibrational characteristics of single phase BaTiO3 ceramic. J Mater Sci: Mater Electron 32, 24041–24049 (2021). https://doi.org/10.1007/s10854-021-06866-7
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DOI: https://doi.org/10.1007/s10854-021-06866-7