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PMN-8PT device structures for electrocaloric cooling applications

: Molin, Christian; Gebhardt, Sylvia


Ferroelectrics 498 (2016), pp.111-119
ISSN: 0015-0193
ISSN: 1563-5112
European Meeting on Ferroelectricity (EMF) <13, 2015, Porto>
Deutsche Forschungsgemeinschaft DFG
SPP 1599; GE 2078/3-1; Ferroic Cooling
Conference Paper, Journal Article
Fraunhofer IKTS ()
electrocaloric effect; PMN-PT; Thick film; Multilayer

Based on fundamental research carried out on PMN-8PT bulk ceramics, screen-printed thick films and multilayer ceramic (MLC) structures have been developed. The influence of device design on the microstructural, dielectric, ferroelectric and electrocaloric properties has been investigated in detail. MLC structures turned out to be promising candidates for implementation into electrocaloric cooling systems providing large refrigerant volume and low single layer thickness. The latter allows for the application of high electric fields under low operation voltages. An electrocaloric temperature change of DT = 0.21 K was measured directly, by application/withdrawal of an electric field ofDE = 2.1 kVmm-1.