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Symmetry of domains in morphotropic PbZr_{1−x}Ti_{x}O_{3} ceramics

Schierholz, Roland and Fuess, Hartmut (2011):
Symmetry of domains in morphotropic PbZr_{1−x}Ti_{x}O_{3} ceramics.
In: Physical Review B, pp. 064122(1-12), 84, (6), ISSN 1098-0121, [Online-Edition: http://dx.doi.org/10.1103/PhysRevB.84.064122],
[Article]

Abstract

PbZr1−xTixO3 (PZT) ceramic samples with compositions over the morphotropic phase boundary (MPB) ranging from 45/55 to 60/40 [(1−x)/x] are studied by transmission electron microscopy combined with convergent-beam electron diffraction (CBED). All point-group symmetries debated for morphotropic PZT, 4mm, m, and 3m, are identified. Up to PZT 54/46 the symmetry is mainly tetragonal within lamellar domain configurations. From PZT 52/48 to PZT 54/46 nanodomains evolve within the tetragonal microdomains and monoclinic symmetry is identified within the same domain configurations, together with tetragonal symmetry for PZT 54/46. For PZT 55/45 up to PZT 60/40 rhombohedral symmetry is observed. Rhombohedral domains, as identified by CBED, are characterized by their width, curved domain walls, and grainy inner contrast. This contrast, together with anisotropic first-order Laue-zone intensities, implies that local deviations from 3m symmetry may exist within rhombohedral domains. Between PZT 54/46 and PZT 55/45 the morphology of the microdomains changes abruptly. For PZT 54.5/45.5 both types of domain configurations coexist within the same grain. For PZT 56/44 a tetragonal inclusion within a rhombohedral matrix is identified by CBED. On the other side of the MPB, domains with a rhombohedral appearance are found in PZT 53.5/46.5. These observation were less frequent but show that coexistence is present in ceramic samples around the MPB.

Item Type: Article
Erschienen: 2011
Creators: Schierholz, Roland and Fuess, Hartmut
Title: Symmetry of domains in morphotropic PbZr_{1−x}Ti_{x}O_{3} ceramics
Language: English
Abstract:

PbZr1−xTixO3 (PZT) ceramic samples with compositions over the morphotropic phase boundary (MPB) ranging from 45/55 to 60/40 [(1−x)/x] are studied by transmission electron microscopy combined with convergent-beam electron diffraction (CBED). All point-group symmetries debated for morphotropic PZT, 4mm, m, and 3m, are identified. Up to PZT 54/46 the symmetry is mainly tetragonal within lamellar domain configurations. From PZT 52/48 to PZT 54/46 nanodomains evolve within the tetragonal microdomains and monoclinic symmetry is identified within the same domain configurations, together with tetragonal symmetry for PZT 54/46. For PZT 55/45 up to PZT 60/40 rhombohedral symmetry is observed. Rhombohedral domains, as identified by CBED, are characterized by their width, curved domain walls, and grainy inner contrast. This contrast, together with anisotropic first-order Laue-zone intensities, implies that local deviations from 3m symmetry may exist within rhombohedral domains. Between PZT 54/46 and PZT 55/45 the morphology of the microdomains changes abruptly. For PZT 54.5/45.5 both types of domain configurations coexist within the same grain. For PZT 56/44 a tetragonal inclusion within a rhombohedral matrix is identified by CBED. On the other side of the MPB, domains with a rhombohedral appearance are found in PZT 53.5/46.5. These observation were less frequent but show that coexistence is present in ceramic samples around the MPB.

Journal or Publication Title: Physical Review B
Volume: 84
Number: 6
Divisions: DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation > Subproject B3: Structure Characterization of Piezoelectric Ceramics With Respect to Electrical Fatigue
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 31 Aug 2012 12:46
Official URL: http://dx.doi.org/10.1103/PhysRevB.84.064122
Additional Information:

SFB 595 B3

Identification Number: doi:10.1103/PhysRevB.84.064122
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