The effects of Sn substitution on the phase, microstructure, and dielectric properties of 0.94(Bi0.5Na0.5)TiO3–0.06Ba(Zr0.1Ti0.9)O3 ceramic system

Abstract

0.94(Bi0.5Na0.5)TiO3–0.06Ba(Zr0.1Ti0.9-xSnx)O3 (x = 0, 0.08, 0.1) (BNT-BZST) ceramics were synthesized via conventional mix oxide sintering route. X-ray diffraction, scanning electron microscopy, inductance (L), capacitance (C), and resistance (R) (LCR) measurement meter, d33 meter, and ferroelectric testes system were used for determining the phase, microstructure, ferroelectric and piezoelectric properties of the samples. Dense microstructure with a decrease in the average grain size with an increase in Sn content was observed. Improvement in the ferroelectric and piezoelectric properties such as dielectric constant (εr), dielectric loss (tanδ), polarization (P), and piezoelectric coefficient (d33) was observed for 08 wt% of Sn substituted sample. A maximum values of saturated polarization (Pmax) ~ 55 µC/cm2, a remnant polarization (Pr) ~35 µC/cm2, d33~130 pC/N and εr ~3895 (1 MHz) at Tm~264 °C were obtained for x=0.08.

Keywords

• Ceramics
• Synthesis
• Properties