Electrocaloric effect and dielectric properties in ferroelectric ceramics based on solid solution of barium-calcium titanate

Barium titanate based ceramics is the most common class of lead-free ceramics due to its high values of dielectric constant, polarization, piezo- and electrocaloric effects. In this paper dielectric properties and electrocaloric effect in ceramics based on solid solution of barium-calcium titanate h...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 1400; no. 7; pp. 77004 - 77008
Main Authors Anokhin, A S, Es'kov, A V, Pakhomov, O V, Semenov, A A, Lähderanta, E
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.11.2019
Subjects
Barium
Barium titanates
Calcium titanate
Ceramics
Dielectric properties
Ferroelectricity
Lead free
Leakage current
Permittivity
Physics
Solid solutions
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Summary:Barium titanate based ceramics is the most common class of lead-free ceramics due to its high values of dielectric constant, polarization, piezo- and electrocaloric effects. In this paper dielectric properties and electrocaloric effect in ceramics based on solid solution of barium-calcium titanate had been studied. It was shown, that increasing of calcium titanate in solid solution leads to increasing of dielectric constant and electrocaloric effect, simultaneouslyit leads to decreasing of leakage currents. While increasing fraction of calcium titanate from 0% to 10%, dielectric constant at frequency of 1 kHz rises from 10500 to 13600, maximum adiabatic electrocaloric response at ΔE = 1.3 V/μm rises from 0.5 K to 0.7 K.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1400/7/077004