2007 Volume 15 Pages 39-45
The authors have succeeded in developing the highly polarization-axis oriented piezoelectric ceramics with superlattice structure by electrophoretic deposition (EPD) method under a strong magnetic field. Although this material has a small anisotropy of the crystal magnetic properties, the use of a magnetic field of 12T enables us to obtain the highly oriented ferroelectric ceramics. The increase in the grain size of the powder used for EPD resulted in a higher degree of orientation of the sintered ceramics, which is attributed to a higher rotation moment of larger grains. The highly polarization-axis oriented ceramics exhibited superior ferroelectric properties with a large remanent polarization of 26μC/cm2 and a piezoelectric strain without hysteresis.