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

doi:10.1016/j.jeurceramsoc.2019.04.032

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 journal › Article › peer-review

21 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 language	English (US)
Pages (from-to)	3315-3319
Number of pages	5
Journal	Journal of the European Ceramic Society
Volume	39
Issue number	11
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2019.04.032
State	Published - Sep 2019

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

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10.1016/j.jeurceramsoc.2019.04.032

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Le Goupil, F., Baker, A., Tonus, F., Berenov, A., Randall, C. A., & Alford, N. M. N. (2019). Direct measurement of electrocaloric effect in lead-free (Na _0.5 Bi _0.5 )TiO ₃ -based multilayer ceramic capacitors Journal of the European Ceramic Society, 39(11), 3315-3319. https://doi.org/10.1016/j.jeurceramsoc.2019.04.032

Le Goupil, Florian ; Baker, Amanda ; Tonus, Florent et al. / 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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title = " Direct measurement of electrocaloric effect in lead-free (Na 0.5 Bi 0.5 )TiO 3 -based multilayer ceramic capacitors ",

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.",

author = "{Le Goupil}, Florian and Amanda Baker and Florent Tonus and Andrey Berenov and Randall, {Clive A.} and Alford, {Neil Mc N.}",

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Le Goupil, F, Baker, A, Tonus, F, Berenov, A, Randall, CA & Alford, NMN 2019, ' Direct measurement of electrocaloric effect in lead-free (Na _0.5 Bi _0.5 )TiO ₃ -based multilayer ceramic capacitors ', Journal of the European Ceramic Society, vol. 39, no. 11, pp. 3315-3319. https://doi.org/10.1016/j.jeurceramsoc.2019.04.032

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 et al.
In: Journal of the European Ceramic Society, Vol. 39, No. 11, 09.2019, p. 3315-3319.

Research output: Contribution to journal › Article › peer-review

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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

AU - Baker, Amanda

AU - Tonus, Florent

AU - Berenov, Andrey

AU - Randall, Clive A.

AU - Alford, Neil Mc N.

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AB - 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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Le Goupil F, Baker A, Tonus F, Berenov A, Randall CA, Alford NMN. Direct measurement of electrocaloric effect in lead-free (Na _0.5 Bi _0.5 )TiO ₃ -based multilayer ceramic capacitors Journal of the European Ceramic Society. 2019 Sep;39(11):3315-3319. doi: 10.1016/j.jeurceramsoc.2019.04.032

Direct measurement of electrocaloric effect in lead-free (Na _0.5 Bi _0.5 )TiO ₃ -based multilayer ceramic capacitors

Abstract

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