High-Quality Lead-Free Ferroelectric Ceramics Prepared from the Flash-Creation-Method-Derived Nanopowder

摘要

We report high-quality and high-density Bi_(3.25)La_(0.75)Ti_3O_(12) ceramics prepared by sintering at a low temperature of 900 deg C from the nanosizect powder with a diameter around 100 nm synthesized by the flash creation method. The densification at 900 deg C, which was 300 deg C lower sintering temperature compared with conventional solid-state reaction, enables us to obtain the ceramics showing a remanent polarization of 14.5 mu C/cm~2, a coercive field of 50 kV/cm and a leakage current of approx 10~(-9)A/cm~2. The superior properties are indicated to originate from lower defect concentration achieved by the low temperature sintering.