The structural and dielectric properties of the Na_0.96 Li_0.04NbO₃ ceramics

Abstract

Ceramic samples Na_0.96Li_0.04NbO₃ were obtained using ceramic technology. The phase and structural analysis, the microstructure, EDS and EPMA, dielectric and hysteresis loops measurements have been performed. The dielectric and hysteresis loops measurements of Na_0.96Li_0.04NbO₃ have been carried out. The dielectric measurements were performed both without and under axial pressure up to 120 MPa. It was shown that Na_0.96Li_0.04NbO₃ ceramics have orthorhombic symmetry at room temperature and undergo a first order phase transition at a temperature of about 570 K. The axial pressure shifts the phase transition temperature and decreases the hysteresis in field-polarisation and field-strain dependences.

Keywords:

• NaNbO3--LiNbO3 solid solutions
• Axial pressure
• Dielectric properties