Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/101958
Title: Dielectric relaxation and phase transition behavior of (1–x)Pb(Zn1/3Nb2/3)O3-xBaTiO3 binary solid solutions
Authors: Gao, Q.
Hu, Q.
Jin, L.
Gorev, M. V.
Chezganov, D. S.
Vlasov, E. O.
Zeng, H.
Zhao, L.
Cui, Y.
Xu, Z.
Wei, X.
Issue Date: 2018
Publisher: Elsevier Ltd
Citation: Dielectric relaxation and phase transition behavior of (1–x)Pb(Zn1/3Nb2/3)O3-xBaTiO3 binary solid solutions / Q. Gao, Q. Hu, L. Jin, et al. — DOI 10.1016/j.ceramint.2018.07.069 // Ceramics International. — 2018. — Vol. 44. — Iss. 15. — P. 18491-18498.
Abstract: Dielectric relaxation and phase transition behaviors in (1–x)Pb(Zn1/3Nb2/3)O3-xBaTiO3 (PZN-BT) binary solid solutions have been systematically studied in this paper. All the compositions display a pure pseudo-cubic perovskite structure. As the BT contents increase from 10 mol% to 70 mol%, the phase transition peak becomes broader and broader, accompanying with decreases of ɛm (the maximum dielectric permittivity) and Tm (the temperature corresponds to the ɛm). Nevertheless, an abnormal increase of ɛm and Tm occurs when the BT contents exceeds 70 mol%, forming a “U” shaped curve of the compositional dependence of ɛm and Tm. Moreover, it is indicated from the new glass model fitting results that the characteristic parameter p, which represents the degree of relaxation, also shows a similar “U” shaped variation curve. Similarly, as shown in polarization-electric field loops, both remnant polarizations (Pr) and coercive fields (Ec) display the “U” shaped curve as the BT content changes from 10 mol% to 80 mol%. Finally, according to the similar variation of these key parameters mentioned above, a polarization mismatched model, which describes the destruction and reestablishment of the long range order arrangement in solid solutions composed of two kinds of ferroelectrics, is proposed to illustrate the underlying mechanism. In this PZN-BT system or other similar ABO3-type perovskite relaxors, the competition between the A-O and B-O coupling plays an important role to form the “U” shaped evolution of these key parameters. © 2018
Keywords: DIELECTRIC RELAXATION
PHASE TRANSITION
POLARIZATION MISMATCH
“U”-SHAPED VARIATION
CURVE FITTING
DIELECTRIC RELAXATION
ELECTRIC FIELDS
PERMITTIVITY
PEROVSKITE
PHASE TRANSITIONS
POLARIZATION
THULIUM
BINARY SOLID SOLUTIONS
COMPOSITIONAL DEPENDENCE
DEGREE OF RELAXATION
DIELECTRIC PERMITTIVITIES
PEROVSKITE RELAXORS
PSEUDOCUBIC PEROVSKITE STRUCTURES
REMNANT POLARIZATIONS
TRANSITION BEHAVIOR
SOLID SOLUTIONS
URI: http://hdl.handle.net/10995/101958
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85050074039
PURE ID: 7759919
67927b64-d4f1-412a-9579-21ee4612bc65
ISSN: 2728842
DOI: 10.1016/j.ceramint.2018.07.069
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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