Concomitant structural and ferroelectric properties of Sr2Bi4Ti5O18 ceramics sintered with (K0.41Na0.53Li0.06)(Nb0.89Sb0.06Ta0.05)O3 perovskite

Effect of ZnSnO3 on dielectric and ferroelectric properties of Sr2Bi4Ti5O18 ceramics

“…Grain growth promotion was extensively observed in the literature for the A-site (Sr +2 or Bi +3 ) substitution in SBT ceramics. 27,32,45,48 This study indicates that the ZS doping in SBT acts as a gain growth inhibitor and indirectly suggests possible ions from doped ZS occupies only B-site (Ti +4 ) cations of SBT. The gain growth reduction in the case of SBT-10, SBT-20, and SBT-30 is mainly due to higher activation energy associated with the incorporation of SnO 2 and Zn 2 SnO 4 ceramics at the grain boundaries of SBT ceramics.…”

“…The ferroelectric properties of the BLSFs compounds mainly depend on several factors, such as structural distortion, oxygen vacancies, and intrinsic or extrinsic contribution. 32 The electrical conductivity of the samples also can have a strong effect on the measured polarization. To confirm this we performed the I-V studies on the same pellets of SBT-0, SBT-5, SBT-10, and SBT-20 ceramics using the same pulses with pulse width and pulse delay of the PUND test.…”

“…20 The ferroelectric and dielectric properties of this ceramic can be tuned or improved by A-site, and B-site substitutions, with sintering aids, making solid solutions with other ferroelectric materials or composites. [24][25][26][27][28][29][30][31][32][33] In another instance, the replacement of Sr 2+ cations at the A-site by the (Na + , Bi 3+ ) and (Li + , Ce 3+ ) or a combination led to improved piezoelectric and ferroelectric properties along with high Curie temperature when compared to that of pure SBT. 24,26,27 For (1 − x) SBT + xBiFeO 3 (where x = 0.3) ceramics' lower leakage current density (0.9 times) and high remanent polarization (1.3 times) were reported compared to that of pure SBT ceramics.…”

“…33 Recently, high relative permittivity (38%), low dielectric loss, and higher maximum polarization (23%) were observed for the 20 mol% KNLNST-SBT ceramic when compared to that of pure SBT ceramics. 32 From these studies, it is imperative that the physical properties of SBT can be further improved by making solid solutions with other ferroelectric materials. In our continued pursuit to design and fabricate superior ferroelectric systems for piezoelectric and ferroelectric device applications in line with the previous research efforts of our group, we have chosen one of our most well-investigated SBT systems and juxtaposed ZS, a structural twin of well-known LiNbO 3 (LNO) into it, which has similar figures of merit as that of the LNO but more importantly devoid of the usual volatile elemental ingredients.…”

“…For instance, 645 nm (average grain) sized SBT ceramics obtained by the sol–gel route have shown the highest remanent polarization (2 P r = 16.4 μC/cm 2 ) as well as the highest piezoelectric coefficient ( d 33 = 22 pCN −1 ) when compared to that of 115 nm (2 P r = 0.98 μC/cm 2 and d 33 = 10 pCN −1 ) and 1427 nm (2 P r = 13.1 μC/cm 2 and d 33 = 17 pCN −1 ) sized SBT ceramics obtained by the same method 20 . The ferroelectric and dielectric properties of this ceramic can be tuned or improved by A‐site, and B‐site substitutions, with sintering aids, making solid solutions with other ferroelectric materials or composites 24–33 . In another instance, the replacement of Sr 2+ cations at the A‐site by the (Na + , Bi 3+ ) and (Li + , Ce 3+ ) or a combination led to improved piezoelectric and ferroelectric properties along with high Curie temperature when compared to that of pure SBT 24,26,27 .…”