Abstract

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 (d33*=526–597pm/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 d33 values of 141–204pC/N have also been attained at the above composition range due to adding new components.

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