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Progress on electrocaloric multilayer ceramic capacitor development
E. T. Jaynes, Ferroelectricity (Princeton University Press, 1953).
T. Usui, S. Hirose, S. Crossley, B. Nair, X. Moya, and N. D. Mathur, “Electrocaloric effects in multilayer capacitors of 0.9Pb(Mg1/2Nb2/3)O3 − 0.1PbTiO3” (unpublished).
M. Vrabelj, H. Uršič, Z. Kutnjak, B. Rožič, S. Drnovšek, A. Benčan, V. Bobnar, L. Fulanović, and B. Malič, J. Eur. Ceram. Soc. 36, 75 (2016).
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capacitor comprising 19 layers of 38 μm-thick 0.9Pb(Mg1/3Nb2/3)O3–0.1PbTiO3 has elsewhere been shown to display electrocaloric temperature changes of 2.2 K due to field changes of 24 V μm−1, near ∼100 °C. Here we demonstrate temperature changes of 1.2 K in an equivalent device with 2.6 times the thermal mass, i.e., 49 layers that could tolerate 10.3 V μm−1. Breakdown was compromised by the increased number of layers, and occurred at 10.5 V μm−1 near the edge of a near-surface inner electrode. Further optimization is required to improve the breakdown strength of large electrocaloric multilayer
capacitors for cooling applications.
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