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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

Abstract

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.


Acknowledgment

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).


References

[1] Lines M E, Glass A M. Principles and Applications of Ferroelectrics and Related Materials. Oxford: Oxford University Press. 1977, Google Scholar

[2] Fatuzzo E, Merz W J. Ferroelectricity. Amsterdam: North-Holland Pub. Co., 1967. Google Scholar

[3] Mitsui T, Tatsuzaki I, Nakamura E. An Introduction to the Physics of Ferroelectrics. London: Gordon & Breach Science Pub. 1976, Google Scholar

[4] Mischenko A S. Giant Electrocaloric Effect in Thin-Film PbZr0.95Ti0.05O3. Science, 2006, 311: 1270-1271 CrossRef PubMed ADS Google Scholar

[5] Neese B, Chu B, Lu S G, et al. Large Electrocaloric Effect in Ferroelectric Polymers Near Room Temperature. Science, 2008, 321: 821-823 CrossRef PubMed ADS Google Scholar

[6] Lu S G, Zhang Q. LARGE ELECTROCALORIC EFFECT IN RELAXOR FERROELECTRICS. J Adv Dielect, 2012, 02: 1230011 CrossRef Google Scholar

[7] Lu S G, Zhang Q. Electrocaloric Materials for Solid-State Refrigeration. Adv Mater, 2009, 21: 1983-1987 CrossRef Google Scholar

[8] Li X, Qian X S, Gu H, et al. Giant electrocaloric effect in ferroelectric poly(vinylidenefluoride-trifluoroethylene) copolymers near a first-order ferroelectric transition. Appl Phys Lett, 2012, 101: 132903 CrossRef ADS Google Scholar

[9] Shaobo L, Yanqiu L. Research on the electrocaloric effect of PMN/PT solid solution for ferroelectrics MEMS microcooler. Mater Sci Eng-B, 2004, 113: 46-49 CrossRef Google Scholar

[10] Liu Y, Peng X, Lou X, et al. Intrinsic electrocaloric effect in ultrathin ferroelectric capacitors. Appl Phys Lett, 2012, 100: 192902 CrossRef ADS Google Scholar

[11] Zhang G, Li Q, Gu H, et al. Ferroelectric polymer nanocomposites for room-temperature electrocaloric refrigeration. Adv Mater, 2015, 27: 1450-1454 Google Scholar

[12] Zhang G, Zhang X, Yang T, et al. Colossal room-temperature electrocaloric effect in ferroelectric polymer nanocomposites using nanostructured barium strontium titanates. ACS Nano, 2015, 9: 7164-7174 Google Scholar

[13] Li Q, Zhang G, Zhang X, et al. Relaxor Ferroelectric-Based Electrocaloric Polymer Nanocomposites with a Broad Operating Temperature Range and High Cooling Energy. Adv Mater, 2015, 27: 2236-2241 CrossRef PubMed Google Scholar

[14] Kar-Narayan S, Crossley S, Mathur N D. Electrocaloric Multilayer Capacitors. Berlin Heidelberg: Springer. 2014, : 91-105 Google Scholar

[15] Sawyer C B, Tower C H. Rochelle Salt as a Dielectric. Phys Rev, 1930, 35: 269-273 CrossRef Google Scholar

[16] Lu S G, Xu Z K, Chen H. Tunability and relaxor properties of ferroelectric barium stannate titanate ceramics. Appl Phys Lett, 2004, 85: 5319-5321 CrossRef Google Scholar

[17] Wei X, Feng Y, Yao X. Slow relaxation of field-induced piezoelectric resonance in paraelectric barium stannate titanate. Appl Phys Lett, 2004, 84: 1534-1536 CrossRef ADS Google Scholar

[18] He Y. Heat capacity, thermal conductivity, and thermal expansion of barium titanate-based ceramics. Thermochimica Acta, 2004, 419: 135-141 CrossRef Google Scholar

[19] Sinyavsky Y V, Brodyansky V M. Experimental testing of electrocaloric cooling with transparent ferroelectric ceramic as a working body. Ferroelectrics, 1992, 131: 321-325 CrossRef Google Scholar

[20] Lu S G, Rožič B, Zhang Q M, et al. Electrocaloric effect in ferroelectric polymers. App Phys, 2012, A107: 559–566. Google Scholar

[21] Lu S G, Rožič B, Zhang Q M, et al. Enhanced electrocaloric effect in ferroelectric poly(vinylidene-fluoride/trifluoroethylene) 55/45 mol % copolymer at ferroelectric-paraelectric transition. Appl Phys Lett, 2011, 98: 122906 CrossRef ADS Google Scholar

[22] Lu S G, Rožič B, Zhang Q M, et al. Comparison of directly and indirectly measured electrocaloric effect in relaxor ferroelectric polymers. Appl Phys Lett, 2010, 97: 202901 CrossRef ADS Google Scholar

[23] Lu S G, Rožič B, Zhang Q M, et al. Organic and inorganic relaxor ferroelectrics with giant electrocaloric effect. Appl Phys Lett, 2010, 97: 162904 Google Scholar

[24] Li X Y, Lu S G, Chen X Z, et al. Pyroelectric and electrocaloric materials. J Mater Chem C, 2013, 1: 23-37 Google Scholar

[25] Lu S G, Zhu X H, Mak C L, et al. High tenability in compositionally graded epitaxial barium strontium titanate thin films by pulsed-laser deposition. Appl Phys Lett, 2003, 87: 2877-2879 Google Scholar

[26] Johnson K M. Variation of Dielectric Constant with Voltage in Ferroelectrics and Its Application to Parametric Devices. J Appl Phys, 1962, 33: 2826-2831 CrossRef ADS Google Scholar

  • 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

    D-3

    D-4

    E-4

    Number of layer

    30

    180

    165

    Ceramic thickness (μm)

    13.56±0.24

    4.67±0.17

    4.11±0.14

    Electrode thickness (μm)

    1.64±0.33

    1.68±0.19

    0.93±0.10

  • Table 2   Entropy change and temperature change of MLCC

    MLCC Sample

    D-3

    D-4

    E-4

    Electric field (MV/m)

    29.50

    68.52

    14.60

    ΔS (J/kg K)

    2.34

    18.86

    7.58

    ΔT (K)

    1.73

    13.94

    5.60

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