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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