Piezoelectric Properties of (Bi0.5Na0.5)1-XBaxTiO3 Lead-Free Ferroelectric Ceramics
Lead-based piezoelectric compounds are the most widely used in a wide applications range such as sensors and transducers. However, these materials are environmentally-aggressive, so these must be replaced by using lead-free compounds. This paper presents the study on the electromechanical behavior and the main piezoelectric parameters of five piezoelectric ceramic compositions of the (Bi0.5Na0.5)1-xBaxTiO3 family, where x = 8, 10, 12, 16, 18 at%. The samples have been prepared by using the standard solid-state reaction method and then polarized under an electric field of 2 kV/mm for a temperature lower than that of the phase’s transition temperature. Results revealed d33 values higher than 120 pC/N for x = 8, 10, 12 at%, better than those for lead-based compounds. There were also obtained d33, d31 and g31 values higher than those reported in the literature for a large number of lead-free systems.
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
This work is licensed under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license.