Electric field-induced irreversible phase transformations in Pb(Zr, Ti)O3-based piezoceramics. (15th February 2023)

• Record Type: Journal Article
• Authors: Kalyani, Ajay Kumar; Kumar, Ajeet; James, A.R.
• Is Part Of: Solid state communications. Volume 361(2023)
• Publication Date: 2023-02-15
• Subjects: Ferroelectric -- Crystal structure -- Rietveld refinement -- Dielectric; Solid state chemistry -- Periodicals; Solid state physics -- Periodicals; Chimie de l'état solide -- Périodiques; Physique de l'état solide -- Périodiques; 530.41
• DOI: 10.1016/j.ssc.2023.115082
• Languages: English
• ISSNs: 0038-1098

Abstract

Abstract: La-modified Pb(Zr, Ti)O3 (PLZT) (d33 ∼ 650 pC/N) and unmodified Pb(Zr1-x, Tix )O3 in the composition range (0.35 = x ≤ 0.51) were electrically poled through a novel powder poling technique. The mechanisms of large piezoelectric response in morphotropic phase boundary (MPB) and non-MPB-based compositions were discussed. Structural analysis suggests MPB-based compositions undergo irreversible structural phase transformation and lattice distortion after poling, and non-MPB undergo irreversible structural phase transformation. In the framework of theories, it has been argued that the MPB compositions satisfy the polarization rotation cum structural distortion phenomenon and non-MPB-based compositions follow the polarization rotation model. Highlights: Electric field-dependent structural study on high-performance La-modified Pb(Zr, Ti)O3 and unmodified Pb(Zr1-x, Tix )O3 in the composition range (0.35 = x ≤ 0.51) were carried out using novel powder poling technique. Structural analysis after poling suggests that the (MPB) based compositions undergo an irreversible structural phase transformation and significant structural distortion. Interestingly, it is found that the non-MPB-based compositions also exhibit irreversible phase transformations. it has been argued that the MPB compositions satisfy the polarization rotation cum structural distortion phenomenon and non-MPB-based compositions follow the polarization rotation model.