Both High Reliability and Giant Electrocaloric Strength in BaTiO3 Ceramics
Open Access
- 8 October 2013
- journal article
- research article
- Published by Springer Science and Business Media LLC in Scientific Reports
- Vol. 3 (1), 2895
- https://doi.org/10.1038/srep02895
Abstract
BaTiO3 has a giant electrocaloric strength, |ΔT|/|ΔE|, because of a large latent heat and a sharp phase transition. The electrocaloric strength of a new single crystal, as giant as 0.48 K·cm/kV, is twice larger than the previous best result, but it remarkably decreased to 0.18 K·cm/kV after several times of thermal cycles accompanied by alternating electric fields, because the field-induced phase transition and domain switching resulted in numerous defects such as microcracks. The ceramics prepared from nano-sized powders showed a high electrocaloric strength of 0.14 K·cm/kV, comparable to the single crystals experienced electrocaloric cycles, because of its unique microstructure after proper sintering process. Moreover, its properties did not change under the combined effects of thermal cycles and alternating electric fields, i.e. it has both large electrocaloric effect and good reliability, which are desirable for practical applications.Keywords
This publication has 31 references indexed in Scilit:
- The giant electrocaloric effect and high effective cooling power near room temperature for BaTiO3 thick filmJournal of Applied Physics, 2011
- PST thin films for electrocaloric coolersJournal of Physics D: Applied Physics, 2011
- Organic and inorganic relaxor ferroelectrics with giant electrocaloric effectApplied Physics Letters, 2010
- Direct measurement of giant electrocaloric effect in BaTiO3 multilayer thick film structure beyond theoretical predictionApplied Physics Letters, 2010
- Investigation of the electrocaloric effect in a PbMg2/3Nb1/3O3-PbTiO3 relaxor thin filmApplied Physics Letters, 2009
- Electrocaloric Materials for Solid‐State RefrigerationAdvanced Materials, 2009
- Giant electrocaloric effect in lead-free thin film of strontium bismuth tantaliteApplied Physics Letters, 2009
- Large Electrocaloric Effect in Ferroelectric Polymers Near Room TemperatureScience, 2008
- Giant electrocaloric effect in the thin film relaxor ferroelectric 0.9PbMg1∕3Nb2∕3O3–0.1PbTiO3 near room temperatureApplied Physics Letters, 2006
- Giant Electrocaloric Effect in Thin-Film PbZr 0.95 Ti 0.05 O 3Science, 2006