Effect of a-site cation substitution of Rb1+ on dielectric and ferroelectric properties in Na0.2K0.3Bi0.5TiO3.

The current research effect focuses on investigating the effect of A-site Rb1+ substitution on Na0.2K0.3Bi0.5TiO3 (RB 0) for 2 mol concentrations of Rb1+ (RB 2). Rb-doped NKBT-30 samples are made utilizing the standard solid-state synthesis approach. The results obtained from X-ray analysis and Raman analysis confirm the existence of a tetragonal phase structure in the samples. The magnitude of Tm is escalated from 315 °C to 365 °C with the replacement of the greater proportion of Rb1+. Dielectric analysis verifies the presence of a distribution of Curie's temperature and enhanced diffused phase transition with an increase in Rb1+ doping. The Grain size declines from 0.473 µm to 0.401 µm due to substitution of Rb. The decrease in the negative strain value with an increase in the concentration of Rb1+ confirms the relaxor nature of the crystals. RB2 exhibits the minimum value of remnant polarization (27 µC/cm2), the maximum value of breakdown field (84 kV/cm), and the minimum value of negative strain, making it a suitable candidate for actuator applications. [ABSTRACT FROM AUTHOR]