Giant piezoelectricity and ultrahigh strain response in bismuth sodium titanate lead-free ceramics

摘要

The obvious conflicts between large piezoelectricity and high strain could be solved by adding new components in BNT. Moreover, this urgent problem has been solved and induced a large strain as well as a high piezoelectricity in BNT. Large normalized strain (d(33)(*)=526-597 pm/V) and high strain (0.342%-0.388%) were achieved at the composition range of 0.0025 <= x <= 0.0050, suggesting that such a system is a promising lead-free candidate for electromechanical actuator applications. Furthermore, high d(33) values of 141-204 pC/N have also been attained at the above composition range due to adding new components. (C) 2015 Elsevier B.V. All rights reserved.