Morphotropic phase boundary and electrical properties of 1-x[Bi0.5Na0.5]TiO3 -xBa[Zr0.25Ti0.75]O-3 lead-free piezoelectric ceramics

Author(s)

Parija, B. ^[1] ; Badapanda, T. ^[2] ; Rout, S. K. ^[3] ; Cavalcante, L. S. ^{[4, 5]} ; Panigrahi, S. ^[1] ; Longo, E. ^[4] ; Batista, N. C. ^[5] ; Sinha, T. P. ^[6]

Affiliation

^[1] NIT, Dept Phys, Rourkela 769008 - India

^[2] CV Raman Coll Engn, Dept Phys, Bhubaneswar 752054, Orissa - India

^[3] BIT, Dept Appl Phys, Ranchi, Bihar - India

^[4] Univ Estadual Paulista, BR-14801907 Araraquara, SP - Brazil

^[5] Univ Estadual Piaui, CCN, Dept Quim, BR-64002150 Teresina, PI - Brazil

^[6] Bose Inst, Dept Appl Phys, Kolkata 700009, W Bengal - India

• Document type: Journal article
• Source: CERAMICS INTERNATIONAL; v. 39, n. 5, p. 4877-4886, JUL 2013.
• Web of Science Citations: 27

Abstract

Lead-free solid solutions (1 - x)Bi0.5Na0.5TiO3 (BNT)-xBaZr(0.25)Ti(0.75)O(3) (BZT) (x=0, 0.01, 0.03, 0.05, and 0.07) were prepared by the solid state reaction method. X-ray diffraction (XRD) and Rietveld refinement analyses of 1-x(BNT)-x(BZT) solid solution ceramic were employed to study the structure of these systems. A morphotropic phase boundary (MPB) between rhombohedral and cubic structures occured at the composition x=0.05. Raman spectroscopy exhibited a splitting of the (TO3) mode at x=0.05 and confirmed the presence of MPB region. Scanning electron microcopy (SEM) images showed a change in the grain shape with the increase of BZT into the BNT matrix lattice. The temperature dependent dielectric study showed a gradual increase in dielectric constant up to x=0.05 and then decrease with further increase in BZT content. Maximum coercive field, remanent polarization and high piezoelectric constant were observed at x=0.05. Both the structural and electrical properties show that the solid solution has an MPB around x=0.05. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved. (AU)

• FAPESP's process: 09/50303-4 - Optical and photocatalytic properties of ZnMoO4 and ZnWO4
• Grantee: Laécio Santos Cavalcante
• Support Opportunities: Scholarships in Brazil - Post-Doctoral