Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"electrocaloric"”.
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Electrocaloric materials and devices
… by changing electric field E. Research into this electrocaloric (EC) effect has focussed on increasing the size of the EC effects, with the long-term aim of building a cooler with an EC material at its heart. Materials and experimental methods are briefly reviewed. A ‘resetting’ indirect route to …
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Indirect measurement of the electrocaloric effect
… in Cambridge, a whole session was devoted to the electrocaloric effect, which is undergoing a modest renaissance. Surprisingly, the various reports showed that the indirect method of measuring cooling (described in the following sections) did not usually agree with the direct method (actually …
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Electrocaloric and barocaloric effects in organic materials
Electrocaloric (EC) and barocaloric (BC) materials undergo reversible thermal changes in response to changes in applied electric field and pressure, respectively. These materials could potentially be exploited in novel solid-state cooling systems that may replace current vapour-compression systems, …
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Secondary pyroelectric and electrocaloric effects in thin films
The pyroelectric and electrocaloric effect play an important role in many applications such as energy harvesting and solid-state cooling. This dissertation focuses on the characterization of the pyroelectric and electric coefficient in thin film using novel laser-based technique. The implementation …
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Electrocaloric applications based on multilayer capacitors of PbSc₀.₅Ta₀.₅O₃
… driven reversible thermal changes, known as electrocaloric (EC) effects, represent a potentially eco-friendly alternative to the greenhouse gases currently used as refrigerants in refrigerators and heat pumps. The phenomenology of EC effects is first briefly discussed, and EC materials and …
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Electrocaloric effects in multilayer capacitors of stoichiometric lead scandium tantalate with varying B‑site cation order
… to generate large thermal changes (known as electrocaloric, or EC, effects) in response to large changes in applied electric fields sustained without breakdown. These MLCs represent a solid‑state, more efficient and eco‑friendly alternative to fluid refrigerants used in vapour‑compression …
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An Examination of the ThermopiezoelectricEffect in Piezoelectric Actuators Via Finite Elements
… due to the presence of a thermal field) and electrocaloric (change in the temperature when an electric field is applied) effects. This thesis presents an examination of how these coupled effects can affect the performance of piezoelectric bender and stack actuators in varying external …
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Mangano oksidu praturtintų PMN-PT keramikų gamyba ir dielektrinis charakterizavimas /
… also to investigate their microstructure, electrocaloric and dielectric properties. The electrocaloric (EC) effect, a reversible and adiabatic temperature change induced in a polar material by an external electric field, could be utilized in refrigeration as a substitute for conventionally …
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Caloric effects in ferroic materials
… that do not use harmful fluids. Magnetocaloric, electrocaloric and mechanocaloric materials have been studied independently as potential replacement of these fluids refrigerants but each has its own limitations. More recently, multicaloric materials that respond to multiple fields have been …
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Measurements of the spontaneous polarization in KH(2)PO(2)
… are reported. the measurement employed the electrocaloric effect, allowing simultaneous determination of the polarization and its temperature derivative. The derivative computed from polarization measurements compares well with direct determinations of (OP/OT)e, demonstrating thermodynamic …
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Structure-property correlations in compositionally complex ferroelectrics
… response, energy storage capacity, and electrocaloric properties, finding applications ranging from ultrasound imaging to electrical energy storage systems. These materials show nanoscale chemical and structural heterogeneity that make finding the origin of their exceptional properties a …