TY - JOUR AB - In this paper, we report on studies of the electrocaloric (EC) effect in lead-free (1−x)Ba(Zr0.2Ti0.8)O3–x(Ba0.7Ca0.3)TiO3 ceramics with compositions range between 0.32 ≤ x ≤ 0.45. The EC effect was measured directly using a modified differential scanning calorimeter. The maximum EC temperature change, ΔTdirect = 0.33 K under an electric field of 2 kV/mm, was observed for the composition with x = 0.32 at ~63°C. We found that the EC effect peaks not only around the Curie temperature but also at the transition between the ferroelectric phases with different symmetries. A strong discrepancy observed between the results of the direct measurements and indirect estimations points out that using Maxwell's equations is invalid for the thermodynamic nonequilibrium conditions that accompany only partial (incomplete) poling of ceramics. We also observe a nonlinearity of the EC effect above the Curie temperature and in the temperature range corresponding to the tetragonal ferroelectric phase. AU - Sanlialp,M AU - Shvartsman,VV AU - Acosta,M AU - Lupascu,DC DO - 10.1111/jace.14456 EP - 4030 PY - 2016/// SN - 0002-7820 SP - 4022 TI - Electrocaloric Effect in Ba(Zr,Ti)O<inf>3</inf>–(Ba,Ca)TiO<inf>3</inf> Ceramics Measured Directly T2 - Journal of the American Ceramic Society UR - http://dx.doi.org/10.1111/jace.14456 VL - 99 ER -