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

5 Scopus citations

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 2019

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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