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

Simons, Hugh ; Glaum, Julia ; Daniels, John E. ; Studer, Andrew J. ; Liess, Andreas ; Rödel, Jürgen ; Hoffman, Mark (2012)
Domain fragmentation during cyclic fatigue in 94%(Bi1/2Na1/2)TiO3-6%BaTiO3.
In: Journal of Applied Physics, 112 (4)
doi: 10.1063/1.4745900
Artikel, Bibliographie

Kurzbeschreibung (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.

Typ des Eintrags: Artikel
Erschienen: 2012
Autor(en): Simons, Hugh ; Glaum, Julia ; Daniels, John E. ; Studer, Andrew J. ; Liess, Andreas ; Rödel, Jürgen ; Hoffman, Mark
Art des Eintrags: Bibliographie
Titel: Domain fragmentation during cyclic fatigue in 94%(Bi1/2Na1/2)TiO3-6%BaTiO3
Sprache: Englisch
Publikationsjahr: 15 August 2012
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Journal of Applied Physics
Jahrgang/Volume einer Zeitschrift: 112
(Heft-)Nummer: 4
DOI: 10.1063/1.4745900
Kurzbeschreibung (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.

Freie Schlagworte: 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
Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 22 Jan 2013 14:40
Letzte Änderung: 05 Mär 2013 10:04
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