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- Title
Effects of Li<sub>2</sub>CO<sub>3</sub>–CuO addition on the sintering behavior, dielectric and piezoelectric properties of PZT ceramics.
- Authors
Zhao, S. Y.; Bian, J. J.
- Abstract
The influences of CuOLi2CO3 additive on the sintering behaviors, microstructure, and dielectric/piezoelectric/ferroelectric properties of a commercial "soft" lead zirconate titanate (PZT)-based piezoelectric ceramic have been investigated in this paper. The sintering temperature of PZT ceramic could be successfully reduced to 1050 °C with the addition of 0.1 wt% CuOLi2CO3. The possible sintering mechanism and sintering kinetics were studied based on the in situ measurement of temperature dependent sintering shrinkages of the samples. Some Cu/Li ions incorporated into the perovskite lattice and the remainder precipitated as Pb-rich secondary phase by eutectic formation at triple junction of grain boundaries. Cu+ seems to be more likely to enter into the perovskite lattice in comparison to Cu2+, leading to a little smaller εr, tanδ, d33 and high temperature conduction. The addition of CuOLi2CO3 leads to an increase in the concentration of rhombohedral phase around the morphotropic phase boundary (MPB) composition, resulting in decreases in permittivity, dielectric loss, piezoelectric coefficient (d33), and coercive field (Ec), slight increase in remnant polarization (Pr), while little change in Tc temperature (~ 310 °C) and electromechanical coupling coefficient (kp). Good combined dielectric and piezoelectric properties with εr = 1881, tanδ = 1.32%, d33 = 474 pC/N and kp = 0.73 could be obtained with the addition of 0.4 wt% CuOLi2CO3 after sintering at 1050 °C/2 h.
- Publication
Journal of Materials Science: Materials in Electronics, 2023, Vol 34, Issue 15, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-023-10658-6