Dielectric and ferroelectric responses of Ba0.99−xBi2x/3Ca0.01Zr0.02Ti0.98O3 ceramics

Effects of Bi2O3 additive on sintering process and dielectric, ferroelectric, and piezoelectric properties of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 lead-free piezoceramics

“…A relaxor behavior has also been reported for Ba 1−x Bi x Zr 0.05 Ti 0.95 O 3 with x = 0.08 by Mahajan et al [31]. According to Zhang et al a similar behavior was also evident in Ba 0.99−x Bi 2x/3 Ca 0.01 Zr 0.02 Ti 0.98 O 3 system for x > 0.125, whereas the material showed a normal ferroelectric behavior at lower values of Bi doping [24]. It should be noted that the onset of relaxor behavior in the present work occurs at a much lower Bi content than those of the previous reports.…”

“…However, different behavior has been observed in sintering of Bi-doped BCZT ceramics. Zhang [24]. Fig.…”

“…The Curie temperature was unaffected upon addition of up to 2 mol% of Y 3+ , but higher amounts resulted in a considerable decrease in T C along with the appearance of a relaxor-like behavior [23]. However, according to Cui et al [17] only 0.06 wt% Y 2 O 3 increased the T C of BCZT to 95 • C. Zhang et al have studied the dielectric and ferroelectric behavior of Ca, Zr, and Bi modified BT [24]. They observed a normal ferroelectric behavior without any changes in T C even for 12 at.% Bi substitution of Ba.…”