Decoding intrinsic and extrinsic contributions for high piezoelectricity of CBT-based piezoelectric ceramics

Abstract

The excellent electrical properties of CaBi4Ti4O15 -based piezoelectric ceramics come from both of intrinsic and extrinsic contributions. Nb5+/Mg2+ co-doping into the Ca0.6(Na0.5Bi0.5)0.4Bi4Ti4O15 ceramic results in the increased oxygen octahedron tilts...

Ultra-high piezoelectric properties and ultra-high Curie temperature of Li/Ce-doped La2Ti2O7 ceramics

“…5(e)–(g) illustrates a comparison of d 33 , ρ dc , and T C between some reported bismuth-layered structure ceramics and the LTO-based ceramics in this work. 16,17,23 The d 33 of modified bismuth layered structure ceramics consistently surpasses the LTO-LC3 ceramics. However, the ρ dc value of the bismuth layered structure materials remains below 10 6 Ω cm at 700 °C.…”

3D printing of CaBi4Ti3.925(Nb2/3Mn1/3)0.075O15 ceramics for high temperature ultrasound transducer

“…Bismuth layer-structured ferroelectric (BLSF) ceramics with high Curie temperatures (>500 • C) and good thermal stability have great potential in high-temperature piezoelectric sensor applications. Therefore, BLSF ceramics such as CaBi 2 Nb 2 O 9 (Tc ∼ 940 • C, d 33 ∼ 5 pC/N) [3], CaBi 4 Ti 4 O 15 (Tc ∼ 790 • C, d 33 ∼ 9 pC/N) [4], Na 0.5 Bi 4.5 Ti 4 O 15 (Tc ∼ 660 • C, d 33 ∼ 17 pC/N) [5], and Bi 4 Ti 3 O 12 (Tc ∼ 675 • C, d 33 ∼ 6 pC/N) [6,7] have drawn great attention in recent years. Among them, CaBi 4 Ti 4 O 15 (CBT) is often considered a good candidate for high-temperature piezoelectric materials because of its good comprehensive properties [4].…”

“…Therefore, BLSF ceramics such as CaBi 2 Nb 2 O 9 (Tc ∼ 940 • C, d 33 ∼ 5 pC/N) [3], CaBi 4 Ti 4 O 15 (Tc ∼ 790 • C, d 33 ∼ 9 pC/N) [4], Na 0.5 Bi 4.5 Ti 4 O 15 (Tc ∼ 660 • C, d 33 ∼ 17 pC/N) [5], and Bi 4 Ti 3 O 12 (Tc ∼ 675 • C, d 33 ∼ 6 pC/N) [6,7] have drawn great attention in recent years. Among them, CaBi 4 Ti 4 O 15 (CBT) is often considered a good candidate for high-temperature piezoelectric materials because of its good comprehensive properties [4]. However, the piezoelectric constant of pure CBT is relatively low (∼9 pC/N), limiting its practical applications.…”

“…Besides, ion doping is effective at enhancing the piezoelectric properties of CBT ceramics. The Nb 5+ /Mg 2+ co-doped CBT ceramic shows an enhanced piezoelectric constant (d 33 ∼ 25.5 pC/N) and slightly decreased Curie temperature (Tc ∼ 738.6 • C) [4]. (Nd, Ce) co-doped CBT ceramics exhibit good piezoelectric properties (d 33 ∼ 19 pC/N), and a high Curie temperature (Tc ∼ 794 • C) [9].…”

Deciphering the synergistic action of multiple factors inducing high piezoresponse in CaBi4Ti4O15‐based piezoelectric ceramics

“…Various previous studies have focused on this method, and some achievements had been realized. 13,14 Wu et al 15 revealed that CBT ceramics doped with Bi 4 Ti 3 O 12 exhibit an optimal piezoelectric constant (d 33 = 13 pC/N). Liu et al 16 reported that Ta/Mn co-doped CBT ceramics exhibit improved electrical properties (d 33 = 24.0 pC/N, T c = 793 1 and Figure S1.…”