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Domain fragmentation during cyclic fatigue in 94%(Bi1/2Na1/2)TiO3-6%BaTiO3

Simons, Hugh and Glaum, Julia and Daniels, John E. and Studer, Andrew J. and Liess, Andreas and Rödel, Jürgen and Hoffman, Mark (2012):
Domain fragmentation during cyclic fatigue in 94%(Bi1/2Na1/2)TiO3-6%BaTiO3.
112, In: Journal of Applied Physics, (4), pp. 044101(1-5), ISSN 00218979, [Online-Edition: http://dx.doi.org/10.1063/1.4745900],
[Article]

Abstract

The fatigue of the lead-free piezoceramic 94%(Bi1/2Na1/2)TiO3-6%BaTiO3 was investigated under bipolar electric fields. Degradation of the polarization, strain, and permittivity was measured during the fatigue process, and correlated with structural data measured at incremental points in the fatigue process using neutron diffraction. The results suggest a two-stage fatigue mechanism whereby, following a field-induced phase transformation to a poled ferroelectric state, the domain structure becomes progressively fragmented by a repetitive process of domain wall pinning and subdivision.

Item Type: Article
Erschienen: 2012
Creators: Simons, Hugh and Glaum, Julia and Daniels, John E. and Studer, Andrew J. and Liess, Andreas and Rödel, Jürgen and Hoffman, Mark
Title: Domain fragmentation during cyclic fatigue in 94%(Bi1/2Na1/2)TiO3-6%BaTiO3
Language: English
Abstract:

The fatigue of the lead-free piezoceramic 94%(Bi1/2Na1/2)TiO3-6%BaTiO3 was investigated under bipolar electric fields. Degradation of the polarization, strain, and permittivity was measured during the fatigue process, and correlated with structural data measured at incremental points in the fatigue process using neutron diffraction. The results suggest a two-stage fatigue mechanism whereby, following a field-induced phase transformation to a poled ferroelectric state, the domain structure becomes progressively fragmented by a repetitive process of domain wall pinning and subdivision.

Journal or Publication Title: Journal of Applied Physics
Volume: 112
Number: 4
Uncontrolled Keywords: barium compounds, bismuth compounds, crystal structure, dielectric hysteresis, dielectric polarisation, electric domain walls, fatigue, ferroelectric ceramics, ferroelectric transitions, neutron diffraction, permittivity, piezoceramics, piezoelectricity, sodium compounds
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 22 Jan 2013 14:40
Official URL: http://dx.doi.org/10.1063/1.4745900
Identification Number: doi:10.1063/1.4745900
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