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A large-sized, high-quality single crystal of K0.47Na0.53NbO3 was grown by the top-seeded solution growth method. A complete set of elastic, dielectric, and piezoelectric constants for a [001]C-poled K0.47Na0.53NbO3 single crystal was determined via combined resonance and ultrasonic methods. The [001]C-poled K0.47Na0.53NbO3 (KNN47) single crystal exhibits a large piezoelectric coefficient (d33 = 220 pC N−1), high coupling coefficients (k33 = 0.759 and kt = 0.702), high dielectric constants (eT11 = 2194 and eS11 = 2162), and relatively high elastic compliance constants (SE11 = 14.3 × 10−12 N m−2 and SE33 = 17.6 × 10−12 N m−2). Furthermore, a large electrical field induced strain of 0.16% was measured from the slope in the unipolar strain versus electric field dependence. The piezoelectric coefficient, , was determined to be as high as 401 pm V−1, likely resulting due to the morphotropic phase boundary around x = 0.5. These excellent properties make KNN47 a good candidate for application as a high-performance transducer material.

High-quality K0.47Na0.53NbO3 single crystal toward high performance transducer

High-quality K_0.47Na_0.53NbO₃ single crystal toward high performance transducer