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Impedance and modulus analysis of barium calcium titanate ferroelectric ceramics

Patel, Satyanarayan ; Kodumudi Venkataraman, Lalitha ; Yadav, Harekrishna (2020)
Impedance and modulus analysis of barium calcium titanate ferroelectric ceramics.
In: Journal of the Korean Ceramic Society
doi: 10.1007/s43207-020-00099-w
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

BaTiO3-based derivatives have been explored in recent times for potential applications in energy harvesting and ultrasonics. To this end, energy harvesting and conversion applications require an understanding of the conduction and loss mecha-nisms. The conduction mechanism in Ba0.9Ca0.1TiO3 (BCT) ceramics is studied using impedance spectroscopy at different temperatures. Impedance analysis suggests the presence of two types of relaxation processes corresponding to grain and grain boundary contributions. The relaxation mechanism follows non-Debye-type behavior. The high resistance of the grain (bulk) in the ferroelectric region does not contribute to the high losses; the losses probably result from the phase transition. In addition, BCT ceramics exhibit a negative temperature coefficient of resistance (NTCR). The open-circuit pyroelectric voltage shows a twofold increase compared to (Ca, Zr) modification in BaTiO3.

Typ des Eintrags: Artikel
Erschienen: 2020
Autor(en): Patel, Satyanarayan ; Kodumudi Venkataraman, Lalitha ; Yadav, Harekrishna
Art des Eintrags: Bibliographie
Titel: Impedance and modulus analysis of barium calcium titanate ferroelectric ceramics
Sprache: Englisch
Publikationsjahr: 3 Dezember 2020
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Journal of the Korean Ceramic Society
DOI: 10.1007/s43207-020-00099-w
Kurzbeschreibung (Abstract):

BaTiO3-based derivatives have been explored in recent times for potential applications in energy harvesting and ultrasonics. To this end, energy harvesting and conversion applications require an understanding of the conduction and loss mecha-nisms. The conduction mechanism in Ba0.9Ca0.1TiO3 (BCT) ceramics is studied using impedance spectroscopy at different temperatures. Impedance analysis suggests the presence of two types of relaxation processes corresponding to grain and grain boundary contributions. The relaxation mechanism follows non-Debye-type behavior. The high resistance of the grain (bulk) in the ferroelectric region does not contribute to the high losses; the losses probably result from the phase transition. In addition, BCT ceramics exhibit a negative temperature coefficient of resistance (NTCR). The open-circuit pyroelectric voltage shows a twofold increase compared to (Ca, Zr) modification in BaTiO3.

Freie Schlagworte: Lead free, BCT ceramics, Impedance spectroscopy, Electric modulus
Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe
Hinterlegungsdatum: 03 Feb 2021 10:36
Letzte Änderung: 03 Feb 2021 10:36
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