Abstract
The KN/BT nanocomplex ceramics with the necking structure were prepared by the solvothermal method to improve dielectric properties and piezoelectric response of barium titanate (BaTiO3, BT)-based ceramics by introducing a three-dimensionally connected structure-gradient region (3D-connected SGR). We attempted to form epitaxial potassium niobate (KNbO3, KN) layers on the sintered BT particle compacts with the necking structure by the solvothermal method at the various temperatures. The presence of the 3D-connected SGR in the KN/BT nanocomplex ceramics is suggested by the XRD measurement and the maximal dielectric constant of 1640 (at 1 MHz) and the maximal apparent piezoelectric constant, d33*, of 430 pm/V (at 0.1 Hz) were recorded for the KN/BT nanocomplex ceramics prepared at 200 °C. The introduction of the 3D-connected SGR is possible to contribute to the enhancement in the dielectric properties and the piezoelectric responses.
