Impedance and modulus analysis of barium calcium titanate ferroelectric ceramics

BaTiO 3 -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 mechanisms. The conduction mechanism in Ba 0.9 Ca 0.1 TiO 3 (B...

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Bibliographic Details
Published inHanʼguk Seramik Hakhoe chi Vol. 58; no. 3; pp. 337 - 350
Main Authors Patel, Satyanarayan, Kodumudi Venkataraman, Lalitha, Yadav, Harekrishna
Format Journal Article
LanguageEnglish
Published Singapore Springer Singapore 01.05.2021
Subjects
Ceramics
Chemistry and Materials Science
Composites
Glass
Materials Science
Natural Materials
Original Article
BCT ceramics
Lead free
Impedance spectroscopy
Electric modulus
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Summary:BaTiO 3 -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 mechanisms. The conduction mechanism in Ba 0.9 Ca 0.1 TiO 3 (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 BaTiO 3 .
ISSN:1229-7801
2234-0491
DOI:10.1007/s43207-020-00099-w