fig2

Figure 2. Dielectric and ferroelectric properties of BNST-xFN ceramic samples. (A-D) Dielectric constant (ε_r) and dielectric loss (tanδ) of BNST-xFN ceramics measured at 1, 10, and 100 kHz, 1 MHz as a function of temperature from room temperature (RT) to 450 °C (A: x = 0; B: x = 0.01; C: x = 0.02; D: x = 0.03). (E) Comparison of curves of ε_r at 1 MHz for BNST-xFN ceramic samples. (F) T_m, T_FR and ε_max as a function of x. (G) P-E loops of BNST-xFN ceramic samples at 100 kV/cm and 3 Hz. (H) S-E curves of BNST-xFN ceramic samples at 100 kV/cm and 3 Hz. (I) Variations in P_max, P_r, S_max and S_neg as a function of x.