B-site substituted solid solutions on the base of sodium-bismuth titanate

Abstract

The paper presents results of studies of the formation of phases during the solid-state synthesis in the [(Na 0:5 Bi 0:5 Þ 0:80 Ba 0:20 ðTi 1Ày B y ÞO 3 system of solid solutions with B-site substitutions. The substitutions by zirconium, tin and ion complexes (In 0:5 Nb 0:5 Þ and (Fe 0:5 Nb 0:5 Þ have been studied. It has been found that the synthesis is a multi-step process associated with the formation of a number of intermediate phases (depending on the compositions and calcination temperatures). Single-phase solid solutions have been produced at the calcination temperatures in the interval 1000-1100 C. An increase in the substituting ions concentration leads to a linear increase of the crystal cell size. At the same time, the tolerance factor gets reduced boosting the stability of the antiferroelectric phase as compared to that of the ferroelectric phase.

Correlation between the structure and dielectric constant of Bi0.5(Na1‐xLix)0.5TiO3 (0 ≤ x ≤ 0.20) solid solutions

“…The main drawbacks of BNT for practical applications are its large coercive field and high electrical conductivity. Several studies have been reported in the literature on the modifications of the composition of BNT to overcome the drawbacks and to improve its piezoelectric properties 5–10 . Most of these studies are centered on the substitution of Na + by K + in Bi 0.5 (Na 1‐ x K x ) 0.5 TiO 3 , and these compositions are considered as potential candidates for various piezoelectric applications 11–23 .…”

“…Several studies have been reported in the literature on the modifications of the composition of BNT to overcome the drawbacks and to improve its piezoelectric properties. [5][6][7][8][9][10] Most of these studies are centered on the substitution of Na + by K + in Bi 0.5 (Na 1x K x ) 0.5 TiO 3 , and these compositions are considered as potential candidates for various piezoelectric applications. [11][12][13][14][15][16][17][18][19][20][21][22][23] Sasaki et al studied the structural, dielectric, and piezoelectric properties of Bi 0.5 (Na 1-x K x ) 0.5 TiO 3 solid solution series and found the morphotropic phase boundary (MPB) region in the range x = 0.16-0.20 and the piezoelectric properties are maximum in this compositional range.…”

Effect of Li Substitution on the Structure and Dielectric Constant of Bi0.5(Na⁠1-xLix)0.5TiO⁠3 (0 ≤ x ≤ 0.20) Solid Solution Series

“…The main drawbacks of BNT for practical applications are its large coercive eld and high electrical conductivity. Several studies have been reported in the literature on the modi cations of BNT to overcome these drawbacks and to improve its piezoelectric properties [5][6][7][8][9][10]. Most of these studies are centered on the substitution of Bi-or Na-site of the perovskite lattice by other metal ions of comparable size, ionic character, etc.…”