Direct measurement of electrocaloric effect in lead-free (Na 0.5 Bi 0.5 )TiO 3 -based multilayer ceramic capacitors

Florian Le Goupil, Amanda Baker, Florent Tonus, Andrey Berenov, Clive A. Randall, Neil Mc N. Alford

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Multilayer ceramic capacitors (MLCCs)of lead-free NBT-based ceramics are produced and their electrocaloric effect (ECE)is characterised for the first time. Dense MLCCs with 97μm-thick active layers are successfully produced by tape casting. Dielectric permittivity measurements reveal the MLCCs to have properties similar with that reported for the corresponding bulk ceramics, including T d ∼50°C and T S ∼100°C. Direct ECE measurements also reveal agreement and confirm the previously reported tendency of the high-field ECE peak to shift towards T S . The highest value of ECE, ΔT max ∼1.7K is measured at 90°C under 90kV/cm. A low breakdown strength of 93kV/cm needs to be solved to realise stronger electric fields and achieve commercially viable ECE values.

Original languageEnglish (US)
Pages (from-to)3315-3319
Number of pages5
JournalJournal of the European Ceramic Society
Volume39
Issue number11
DOIs
StatePublished - Sep 1 2019

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Ceramic capacitors
Multilayers
Lead
Permittivity measurement
Tapes
Casting
Electric fields

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Le Goupil, Florian ; Baker, Amanda ; Tonus, Florent ; Berenov, Andrey ; Randall, Clive A. ; Alford, Neil Mc N. / Direct measurement of electrocaloric effect in lead-free (Na 0.5 Bi 0.5 )TiO 3 -based multilayer ceramic capacitors In: Journal of the European Ceramic Society. 2019 ; Vol. 39, No. 11. pp. 3315-3319.
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abstract = "Multilayer ceramic capacitors (MLCCs)of lead-free NBT-based ceramics are produced and their electrocaloric effect (ECE)is characterised for the first time. Dense MLCCs with 97μm-thick active layers are successfully produced by tape casting. Dielectric permittivity measurements reveal the MLCCs to have properties similar with that reported for the corresponding bulk ceramics, including T d ∼50°C and T S ∼100°C. Direct ECE measurements also reveal agreement and confirm the previously reported tendency of the high-field ECE peak to shift towards T S . The highest value of ECE, ΔT max ∼1.7K is measured at 90°C under 90kV/cm. A low breakdown strength of 93kV/cm needs to be solved to realise stronger electric fields and achieve commercially viable ECE values.",
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Direct measurement of electrocaloric effect in lead-free (Na 0.5 Bi 0.5 )TiO 3 -based multilayer ceramic capacitors . / Le Goupil, Florian; Baker, Amanda; Tonus, Florent; Berenov, Andrey; Randall, Clive A.; Alford, Neil Mc N.

In: Journal of the European Ceramic Society, Vol. 39, No. 11, 01.09.2019, p. 3315-3319.

Research output: Contribution to journalArticle

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T1 - Direct measurement of electrocaloric effect in lead-free (Na 0.5 Bi 0.5 )TiO 3 -based multilayer ceramic capacitors

AU - Le Goupil, Florian

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AU - Tonus, Florent

AU - Berenov, Andrey

AU - Randall, Clive A.

AU - Alford, Neil Mc N.

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