Inverse barocaloric effects in ferroelectric BaTiO3 ceramics
Open Access
- 1 September 2016
- journal article
- research article
- Published by AIP Publishing in APL Materials
- Vol. 4 (9), 091102
- https://doi.org/10.1063/1.4961598
Abstract
We use calorimetry to identify pressure-driven isothermal entropy changes in ceramic samples of the prototypical ferroelectric BaTiO3. Near the structural phase transitions at ∼400 K (cubic-tetragonal) and ∼280 K (tetragonal-orthorhombic), the inverse barocaloric response differs in sign and magnitude from the corresponding conventional electrocaloric response. The differences in sign arise due to the decrease in unit-cell volume on heating through the transitions, whereas the differences in magnitude arise due to the large volumetric thermal expansion on either side of the transitions.Keywords
Funding Information
- Engineering and Physical Sciences Research Council (EP/M003752/1)
- European Research Council (ERC Starting Grant 680032)
This publication has 46 references indexed in Scilit:
- Colossal Room-Temperature Electrocaloric Effect in Ferroelectric Polymer Nanocomposites Using Nanostructured Barium Strontium TitanatesACS Nano, 2015
- New developments in caloric materials for cooling applicationsAIP Advances, 2015
- Relaxor Ferroelectric‐Based Electrocaloric Polymer Nanocomposites with a Broad Operating Temperature Range and High Cooling EnergyAdvanced Materials, 2015
- Caloric materials near ferroic phase transitionsNature Materials, 2014
- Large Electrocaloric Effect in a Dielectric Liquid Possessing a Large Dielectric Anisotropy Near the Isotropic–Nematic TransitionAdvanced Functional Materials, 2013
- Electrocaloric materials for future solid-state refrigeration technologiesProgress in Materials Science, 2012
- Electrocaloric MaterialsAnnual Review of Materials Research, 2011
- Enhanced electrocaloric effect in ferroelectric poly(vinylidene-fluoride/trifluoroethylene) 55/45 mol % copolymer at ferroelectric-paraelectric transitionApplied Physics Letters, 2011
- Large Electrocaloric Effect in Ferroelectric Polymers Near Room TemperatureScience, 2008
- Giant Electrocaloric Effect in Thin-Film PbZr 0.95 Ti 0.05 O 3Science, 2006