Open AccessProgress on electrocaloric multilayer ceramic capacitor development
Author(s) -
S. Hirose,
Tomoyasu Usui,
Sam Crossley,
B. Nair,
Akira Ando,
Xavier Moya,
N. D. Mathur
Publication year - 2016
Publication title -
apl materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.571
H-Index - 60
ISSN - 2166-532X
DOI - 10.1063/1.4950796
Subject(s) - materials science , capacitor , ceramic , electrocaloric effect , ceramic capacitor , composite material , electrode , optoelectronics , enhanced data rates for gsm evolution , thermal , ferroelectricity , voltage , dielectric , electrical engineering , thermodynamics , engineering , telecommunications , chemistry , physics , computer science
A multilayer 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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