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Electric-Field-Induced Phase Transformation and Frequency-Dependent Behavior of Bismuth Sodium Titanate-Barium Titanate

Lee, Kai-Yang ; Shi, Xi ; Kumar, Nitish ; Hoffman, Mark ; Etter, Martin ; Checchia, Stefano ; Winter, Jens ; Lemos da Silva, Lucas ; Seifert, Daniela ; Hinterstein, Manuel

Materials, 2020-02, Vol.13 (5), p.1054-1-1054-14 [Periódico revisado por pares]

Switzerland: MDPI

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Título:
Electric-Field-Induced Phase Transformation and Frequency-Dependent Behavior of Bismuth Sodium Titanate-Barium Titanate
Autor: Lee, Kai-Yang ; Shi, Xi ; Kumar, Nitish ; Hoffman, Mark ; Etter, Martin ; Checchia, Stefano ; Winter, Jens ; Lemos da Silva, Lucas ; Seifert, Daniela ; Hinterstein, Manuel
Assuntos: Actuating materials ; BNT-BT ; Chemical Sciences ; Engineering and Technology ; Ferroelectrics ; Kemi ; Lead-free ; Materialkemi ; Materials Chemistry ; Materials Engineering ; Materialteknik ; Metallurgi och metalliska material ; Metallurgy and Metallic Materials ; Natural Sciences ; Naturvetenskap ; Phase transformation ; Piezoceramics ; Piezoelectricity ; Relaxor ; Self-heating ; Teknik ; X-ray powder diffraction
É parte de: Materials, 2020-02, Vol.13 (5), p.1054-1-1054-14
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: The electric field response of the lead-free solid solution (1- )Bi Na TiO - BaTiO (BNT-BT) in the higher BT composition range with = 0.12 was investigated using in situ synchrotron X-ray powder diffraction. An introduced Bi-excess non-stoichiometry caused an extended morphotropic phase boundary, leading to an unexpected fully reversible relaxor to ferroelectric (R-FE) phase transformation behavior. By varying the field frequency in a broad range from 10 up to 10 Hz, BNT-12BT showed a frequency-dependent gradual suppression of the field induced ferroelectric phase transformation in favor of the relaxor state. A frequency triggered self-heating within the sample was found and the temperature increase exponentially correlated with the field frequency. The effects of a lowered phase transformation temperature T , caused by the non-stoichiometric composition, were observed in the experimental setup of the freestanding sample. This frequency-dependent investigation of an R-FE phase transformation is unlike previous macroscopic studies, in which heat dissipating metal contacts are used.
Editor: Switzerland: MDPI
Idioma: Inglês

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Electric-Field-Induced Phase Transformation and Frequency-Dependent Behavior of Bismuth Sodium Titanate-Barium Titanate

Lee, Kai-Yang ; Shi, Xi ; Kumar, Nitish ; Hoffman, Mark ; Etter, Martin ; Checchia, Stefano ; Winter, Jens ; Lemos da Silva, Lucas ; Seifert, Daniela ; Hinterstein, Manuel

Switzerland: MDPI

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