Microstructure and electric properties of strontium niobate ceramics

Strontium niobate (SNO) ceramics were prepared by the conventional mixed-oxide method and the crystalline microstructure, surface morphology and electric properties were investigated. The X-ray diffraction pattern showed that there exists no other phases. The dielectric constant and dielectric loss were 54 and 1.3% at 10 kHz, respectively. The piezoelectric constant (d33) reached 2.4 pC/N. There existed well-behaved hysteresis loops, and the remanent polarization (Pr) and the coercive field (EC) of SNO ceramics are 0.022 μC/cm2 and 3.56 kV/cm, respectively.