High- and low-field dielectric responses and ferroelectric properties of (Bi0.5Na0.5)Zr1−xTixO3 ceramics

Diffuse Dielectric Behavior of (Bi0.5Na0.5)Zr1-xTixO3Lead-Free Ceramics

“…1) and an inset back-scattered electron image taken from our previous report (Fig. 2(f)) [6,7] could support further the compositional fluctuation in these samples. In addition, the diffuse phase transition due to the compositional inhomogeneity was observed similarly in other reports investigating Bi-and Na-based compounds [9,10].…”

“…054873) for Ti addition of x = 0.1 and 0.2, and ZrO 2 (JADE No.371484) for the Ti addition up to x = 0.3, which was attributed to the disintegration of the easily-melting composition i.e. Bi 2 O 3 and Na 2 CO 3 [6,7]. This evidence implied a compositional fluctuation of the system.…”

“…According to electrical property dependence of Zr/Ti composition for BZT, it then became our motivation to seek further understanding on electrical properties of Bi 0.5 Na 0.5 Zr 1-x Ti x O 3 (BNZT) ceramics. Accordingly, BNZT compositions where x = 0, 0.1, 0.2, 0.3, 0.4, 0.5 and 0.6 were investigated in our previous work and it was found that Ti addition apparently resulted in a phase transformation from a typical orthorhombic phase of BNZ to a rhombohedral phase in Ti-rich BNZT ceramic to cause an increase of dielectric properties at room temperature for both low and high applied field [6,7]. In order to bring better understanding on dielectric behavior and rhombohedral phase transition dominance in BNZT ceramics, the dielectric measurement BNZ and BNZT with Ti concentration of 0 ≤ x ≤ 0.6 as a function of the temperature was carried out and discussed in this study.…”

“…The data of BNZT ceramics 0 ≤ x ≤ 0.6 are taken from our previous report[7]. (Color figure available online.…”

Structure and properties of (Na0.5Bi0.5)ZrO3 (NBZ) lead-free perovskite compound

“…The elaboration of NBZ powders and the densification mechanism of ceramics were studied and the orthorhombic space group Pnma (SG #62) was attributed to NBZ without any structural study [15,16]. Ferroelectric properties were reported for NBZ [17], but: (i) this property is conflicting with the centrosymmetric Pnma space group and (ii) the elliptic shape of hysteresis loop is typical of a lossy dielectric and not of a ferroelectric material [18]. The evolution of lattice parameters and dielectric properties in the (Na0.5Bi0.5)(Zr1-xTix)O3 solidsolution were later studied [19][20][21][22], confirming that zirconium can totally substitute titanium in such complex perovskites, like for KBT-KBZ system [23].…”