SCIENCE CHINA Technological Sciences, Volume 59 , Issue 7 : 1054-1058(2016) https://doi.org/10.1007/s11431-016-6079-1

Large electrocaloric effect in BaTiO3 based multilayer ceramic capacitors

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  • ReceivedDec 31, 2015
  • AcceptedApr 17, 2016
  • PublishedJun 20, 2016


The electrocaloric effect (ECE) of multilayer ceramic capacitor (MLCC) of Y5V type was directly measured via a differential scanning calorimetry (DSC) method and a reference resistor was used to calibrate the heat flow due to the heat dissipation. The results are compared with those calculated from Maxwell relations by using the polarization data obtained from the polarization–electric field hysteresis loops. The direct method shows a larger ECE temperature change, which is accounted for the situation approaches an ideal condition. For the indirect method using Maxwell relations, only the polarization projection along the electric field was taken into account, which will be less than the randomly distributed real polarizations that contribute to the ECE. The MLCCs exhibit a broad peak of ECE around 80C, which will be favorite for the practical ECE cooling devices.


This work was supported by the National Natural Science Foundation of China (Grant No. 51372042), the Department of Education of Guangdong Province of People’s Republic of China (Grant No. 2014GKXM039), Guangdong Provincial Natural Science Foundation (Grant No. 2015A030308004), and the NSFC-Guangdong Joint Fund (Grant No.U1501246).


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  • Figure 1

    (Color online) SEM image of MLCC samples D-3 (a), D-4 (b) and E-4 (c). Scale bars are also shown in the images.

  • Figure 2

    (Color online) Permittivities as a function of temperature as well as frequency for three samples D-3 (a), D-4 (b) and E-4 (c).

  • Figure 3

    (Color online) P-E hysteresis loops for sample D-3.

  • Figure 4

    (Color online) Polarization as a function of temperature for sample D-3.

  • Figure 5

    (Color online) (a) ECE entropy change as a function of temperature for sample D-3; (b) ECE temperature change as a function of temperature for sample D-3.

  • Figure 6

    (Color online) ECE heat flow as a function of time for sample D-4.

  • Table 1   Sample layers, dielectric thickness and inner electrode thickness

    MLCC Sample




    Number of layer




    Ceramic thickness (μm)




    Electrode thickness (μm)




  • Table 2   Entropy change and temperature change of MLCC

    MLCC Sample




    Electric field (MV/m)




    ΔS (J/kg K)




    ΔT (K)




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