| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1791714 | Journal of Crystal Growth | 2012 | 4 Pages |
0.95Na0.5Bi0.5TiO3–0.05K0.5Bi0.5TiO3 lead-free piezoelectric single crystal with rhombohedral structure was grown by the top-seeded solution growth method. The temperature dependence of dielectric constant and loss, polarization hysteresis loops, the optimum poling condition and the electromechanical coupling property were investigated for the 〈100〉-oriented as-grown crystal. The curves ε(T) show two anomalies, which are related to the two phase transformations at the temperature range of 130–340 °C. The piezoelectric constant d33 and electromechanical coupling coefficient kt for the 〈001〉-oriented crystal at room temperature reached 147 pC/N and 0.52, respectively. The value of kt demonstrated a relatively stable thermal electromechanical coupling property over the temperature range of 15–130 °C.
► High-quality and large-size 0.95NBT–0.05KBT crystal has been firstly grown. ► The phase transition related to the two abnormal dielectric peaks was elucidated. ► The temperature dependence of the value kt for the crystal was firstly reported. ► The optimum poling condition for the crystal was firstly investigated.
