Abstract

Barium titanate (BaTiO3, BT)–potassium niobate (KNbO3, KN) (BT–KN) nanocomplex ceramics with various KN/BT molar ratios were prepared by a solvothermal method. From a transmittance electron microscopy (TEM) observation, it was confirmed that KN layer thickness of the BT–KN nanocomplex ceramics was controlled from 0 to 44nm by controlling KN/BT molar ratios. Their apparent piezoelectric constants d33* were measured at 20°C and 0.1Hz, and the maximum d33* of around 167pC/N was measured for the BT–KN nanocomplex ceramics with a KN thickness of 33nm. The result suggested that the strained heteroepitaxial interface could be responsible to the enhanced piezoelectric properties.

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