Feasibility of electrocaloric refrigeration for the 4–15 K temperature range

Radebaugh, Ray; Lawless, W. N.; Siegwarth, J. D.; Morrow, A. J.

doi:10.1016/0011-2275(79)90019-5

Cited by 60 publications

(23 citation statements)

References 86 publications

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“…Unlike other solid-state refrigeration technologies, ferroelectric cooler based on the principle of EC effect could be small and energy efficient [1]. In all of the ferroelectric (FE) materials found to date, lead-based ferroelectric materials such as lead zirconate titanate (PZT) [2], and lead magnesium niobate-lead titanate (PMN-PT) [3] have been extensively investigated in terms of their EC effects.…”

Section: Introductionmentioning

confidence: 99%

Electro-caloric behaviors of lead-free Bi0.5Na0.5TiO3-BaTiO3 ceramics

Zheng

Lin

et al. 2011

J Electroceram

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Electro-caloric (EC) properties of lead-free Ba 0.5 Na 0.5 TiO 3 -xBaTiO 3 (BNT-xBT) ceramics prepared by citrate method are investigated at temperatures of 30-250°C. Based on thermodynamics calculations, BNT-xBT (x00, 0.05, 0.06, 0.1, 0.25, 0.3) are found to show EC effects different with other lead-based or lead-free ferroelectric ceramics, i.e., they absorb heats (refrigeration effect) during the processes of field application while other ferroelectric ceramics show refrigeration effect during the processes of field removal. The EC temperature change of BNT-xBT can be as large as 2.1°C under an electric field of 60 kV/cm, which is larger than most of the lead-free ferroelectric bulk ceramics. When x is close to the morphotropic phase boundary (x~0.06-0.1), the EC temperature change of BNT-xBT shows a maximum near the ferroelectric to anti-ferroelectric transition temperature, which is characterized by dynamic mechanical analysis. This study suggests that these lead-free ferroelectric materials are promising in the practical application as EC coolers.

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Section: Introductionmentioning

confidence: 99%

Electro-caloric behaviors of lead-free Bi0.5Na0.5TiO3-BaTiO3 ceramics

Zheng

Lin

et al. 2011

J Electroceram

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“…While there have been several reported schemes for exploiting bulk ECE for refrigeration, there have not been any detailed discussion of thin-film electrocaloric devices (Radebaugh et al 1979;Olsen et al 1985). Here we describe an approach to ECE heat engines based on stacks of thin films of electrocaloric materials interleaved with thin-film heat switches.…”

Section: Introductionmentioning

confidence: 99%

Electrocaloric devices based on thin-film heat switches

Epstein

Malloy

2009

Journal of Applied Physics

126

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Abstract:We describe a new approach to refrigeration and electrical generation that exploits the attractive properties of thin films of electrocaloric materials. Layers of electrocaloric material coupled with thin-film heat switches can work as either refrigerators or electrical generators, depending on the phasing of the applied voltages and heat switching. With heat switches based on thin layers ofliquid crystals, the efficiency of these thin-film heat engines can be at least as high as that of current thermoelectric devices. Advanced heat switches would enable thin-film heat engines to outperform conventional vapor compression devices.

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“…Research of electrocaloric effect (ECE), i.e., the conversion of electrical energy into heat is largely devoted to finding environmentally friendly materials for practical electrocaloric cooling applications, such as the cooling of electronic components. 1 The ECE in dielectric materials has a great potential in realizing solid-state cooling devices with compact size and high energy efficiency, which is highly desirable for a large range of applications. 2 In the past decade, the ECE has seen a spate of research efforts especially in the ferroelectric materials summarized recently in Ref.…”

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confidence: 99%