Electrocaloric Effect in Some Perovskite Ferroelectric Ceramics and Multilayer Capacitors

Shebanovs, L.; Borman, K.; Lawless, W. N.; Калване, А.

doi:10.1080/00150190211761

Cited by 140 publications

(61 citation statements)

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“…The electrocaloric effect in multilayer capacitors was already reported. 15,127 But it is only recently that the promise of multilayer capacitors in practical electrocaloric refrigeration was addressed 22,128,129,153 and was regarded as one of the main breakthroughs in this field. 3 Using multilayer capacitors is a successful compromise allowing high breakdown field and relative large electrocaloric active volume.…”

Section: Infra-red Cameramentioning

confidence: 99%

“…99 14 In addition, a similar electrocaloric effect of 2.4 K was reported in PbSc 0.5 Ta 0.5 O 3 ceramics in 2002. 15 It is not until 2006 that a Science paper 16 inspired both fundamental physics and exciting device applications for electrocaloric effect. Mischenko et al at Cambridge reported a giant electrocaloric effect with an adiabatic temperature change of about 12 K in antiferroelectric PbZr 0.…”

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confidence: 99%

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Direct and indirect measurements on electrocaloric effect: Recent developments and perspectives

Liu

Scott

Dkhil

2016

Applied Physics Reviews

232

150

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It has been ten years since the discovery of the giant electrocaloric effect in ferroelectric materials showed that it is possible to employ this effect for substantial cooling applications. This last decade has been marked by increasing research interest, especially in characterizing and measuring the electrocaloric effect using both the so-called indirect and direct approaches. In this context, a comprehensive summary and careful reexamination of these approaches are very timely and of great importance to justify the assumptions used in different measurement techniques. This review is therefore dedicated to cover recent important and rapid advances from both the indirect and direct measurements and provides critical insights relevant for quantifying the electrocaloric effect. It involves electrocaloric materials from normal ferroelectrics, antiferroelectrics, and relaxors, and it fundamentally focuses on how the electrocaloric entropy changes in response to electric field in these typical electrocalorics. The article addresses recent developments, especially during the past three years, such as technical selection of proper polarization-electric field loops, negative electrocaloric effect in antiferroelectrics and relaxors, the controversial debate on the indirect method in relaxors, the important role of field dependence of specific heat, kinetic factors, and so on. Moreover, this review also is concerned with extracting reliable data by direct measurements. Four typical techniques and devices used recently, such as thermocouples, differential scanning calorimeters, specifically designed calorimeters, and scanning thermal microscopy, are briefly reviewed, while infrared cameras are emphasized. We hope that our review will not only provide a useful background to understand fundamentally the electrocaloric effect and what one really measures but also may act as a practical guide to exploit and develop electrocalorics towards the design of suitable devices. Published by AIP Publishing. [http://dx

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Section: Infra-red Cameramentioning

confidence: 99%

mentioning

confidence: 99%

Direct and indirect measurements on electrocaloric effect: Recent developments and perspectives

Liu

Scott

Dkhil

2016

Applied Physics Reviews

232

150

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“…[15][16][17] However, these temperature changes were smaller than 2.5 K. 18) In 2006, Mischenko et al suggested that a much larger ΔT appears near the para=ferro critical point. 19) From his suggestion, many ferroelectric materials were measured near the critical temperature.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of a cooling system using electrocaloric effect

Honmi

Hashizume

Nakajima

et al. 2017

Jpn. J. Appl. Phys.

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A cooling system using the electrocaloric effect is investigated on the bases of the thermodynamic theory. The electrocaloric effect causes a temperature change of dielectric materials. In this study, we introduce a simple model of the cooling system including a target object, a heat removal body, and a dielectric material. We confirm that the temperature of the target object certainly decreases. Furthermore, we propose an efficient control procedure of the electric field for cooling the target object. As a result, we show that the temperature change is enhanced by the proposed method.

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“…The ferroelectric refrigeration is based on the electrocaloric (EC) effect, which is referred to the heat exchange resulting from the electric field induced paraelectric-ferroelectric (P-F) phase transition. Recently, the giant EC effect is obtained in some ferroelectric thin films successively [1][2][3][4][5][6], and was studied in various ferroelectric materials based on thermodynamics [7][8][9][10][11][12][13]. The large EC reversible adiabatic temperature change (> 10 °C) of those ferroelectric thin films makes them most desirable to be used as refrigerants in ferroelectric micro-refrigerators.…”

Section: Introductionmentioning

confidence: 99%

Kinetic electrocaloric effect and giant net cooling of lead-free ferroelectric refrigerants

Bai¹,

Zheng²,

Shi³

2010

Journal of Applied Physics

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Abstract. Giant electrocaloric (EC) effect is observed in BaTiO 3multilayer thick film structure. The temperature change is as high as 4.0 o C under an applied electric field of 352 kV/cm. Most importantly, the EC effect is found to depend on the varying rate of the applied field.Based on the giant net cooling (~0.37 J/g) resulting from the difference in the varying rates of rising and falling fields, the kinetic EC effect provides an effective solution for the design of refrigeration cycle in ferroelectric micro-refrigerator.Text pages 2

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Electrocaloric Effect in Some Perovskite Ferroelectric Ceramics and Multilayer Capacitors

Cited by 140 publications

References 0 publications

Direct and indirect measurements on electrocaloric effect: Recent developments and perspectives

Direct and indirect measurements on electrocaloric effect: Recent developments and perspectives

Thermodynamic analysis of a cooling system using electrocaloric effect

Kinetic electrocaloric effect and giant net cooling of lead-free ferroelectric refrigerants

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