Crystal structure and properties of K0.5Na0.5NbO3–Bi0.5Na0.5TiO3–LiSbO3 lead-free piezoelectric ceramics

Dielectric and piezoelectric properties of Sb5+ doped (NaBi)0.38(LiCe)0.05[]0.14Bi2Nb2O9 ceramics

“…1(b). This result suggests that the addition of Sb 5+ into B sites of NBN pseudo-perovskite unit cells increases the tetragonality of the crystal structure; similar effect was found in Sb 5+ -modified (K, Na)NbO 3 systems [21]. Fig.…”

“…Nevertheless, literature mainly focused on ionic substitution at A-sites, whereas the B sites modification is hitherto rarely reported. Quinquevalent antimony ion (Sb 5+ ) has been proved to be a desirable dopant for the improvement of piezoelectric property of Nb-based perovskite systems [21]. It was also found that Sb 5+ and Ta 5+ doped Bi 4 Ti 3 O 12 compounds possessed a high d 33 value (∼35 pC/N) recently [22].…”

Microstructure, electrical properties, and electric field‐induced phase transitions in NaNbO3–LiTaO3 lead‐free ceramics

“…This suggests that a small amount of LiTaO 3 can induce ferroelectricity in the initially AFE NaNbO 3 . As x increases, the P-E loop becomes gradually narrow and slanted.…”

“…BaTiO 3 (BT)- [1], Bi 0.5 Na 0.5 TiO 3 (BNT)- [2], and K 0.5 Na 0.5 NbO 3 (KNN)- [3] based ceramics are the most intensively investigated lead-free materials and possess high piezoelectric constant. However, these leadfree ceramics without acceptor doping (e.g., Cu, Mn, etc.)…”

“…5a, while the inset figure shows the variation of Curie temperature T C with x. Unlike BT-, BNT-, and KNN-based ceramics [1][2][3], only a dielectric peak associated with the FE to paraelectric transition is observed in the NN-LT-x ceramics (Fig. 5a).…”