Solid solutions of (1 − x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 promise to exhibit a large electrocaloric effect (ECE), because their Curie temperature and a multiphase coexistence region lie near room temperature. We report on direct measurements of the electrocaloric effect in bulk ceramics 0.65Ba(Zr0.2Ti0.8)O3-0.35(Ba0.7Ca0.3)TiO3 using a modified differential scanning calorimeter. The adiabatic temperature change reaches a value of ΔTEC = 0.33 K at ∼65 °C under an electric field of 20 kV/cm. It remains sizeable in a broad temperature interval above this temperature. Direct measurements of the ECE proved that the temperature change exceeds the indirect estimates derived from Maxwell relations by about ∼50%. The discrepancy is attributed to the relaxor character of this material.
Skip Nav Destination
Article navigation
9 February 2015
Research Article|
February 09 2015
Strong electrocaloric effect in lead-free 0.65Ba(Zr0.2Ti0.8)O3-0.35(Ba0.7Ca0.3)TiO3 ceramics obtained by direct measurements
Mehmet Sanlialp;
Mehmet Sanlialp
1Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE),
University of Duisburg-Essen
, Universitätsstraße 15, 45141 Essen, Germany
Search for other works by this author on:
Vladimir V. Shvartsman;
Vladimir V. Shvartsman
1Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE),
University of Duisburg-Essen
, Universitätsstraße 15, 45141 Essen, Germany
Search for other works by this author on:
Matias Acosta
;
Matias Acosta
2Institute of Materials Science,
Technische Universität Darmstadt
, Alarich-Weiss Str. 2, 64287 Darmstadt, Germany
Search for other works by this author on:
Brahim Dkhil;
Brahim Dkhil
3Laboratoire Structures Propriétés et Modélisation des Solides, UMR CNRS 8580,
Université Paris-Saclay
, CentraleSupélec, 92295 Chatenay-Malabry Cedex, France
Search for other works by this author on:
Doru C. Lupascu
Doru C. Lupascu
1Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE),
University of Duisburg-Essen
, Universitätsstraße 15, 45141 Essen, Germany
Search for other works by this author on:
Appl. Phys. Lett. 106, 062901 (2015)
Article history
Received:
December 11 2014
Accepted:
January 28 2015
Citation
Mehmet Sanlialp, Vladimir V. Shvartsman, Matias Acosta, Brahim Dkhil, Doru C. Lupascu; Strong electrocaloric effect in lead-free 0.65Ba(Zr0.2Ti0.8)O3-0.35(Ba0.7Ca0.3)TiO3 ceramics obtained by direct measurements. Appl. Phys. Lett. 9 February 2015; 106 (6): 062901. https://doi.org/10.1063/1.4907774
Download citation file:
Sign in
Don't already have an account? Register
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Sign in via your Institution
Sign in via your InstitutionPay-Per-View Access
$40.00