Journal
ENERGY TECHNOLOGY
Volume 4, Issue 5, Pages 647-652Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ente.201500446
Keywords
elastocalorics; ferroelectrics; lead zirconate titanate; piezocalorics; piezoelectrics
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Funding
- Indian National Science Academy (INSA), New Delhi, India - Department of Science and Technology (DST), New Delhi, under INSPIRE faculty award [ENG-01]
- INSA Young Scientists Medal
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This study demonstrates that stress-driven caloric effects can be obtained in bulk lead zirconate titanate (PZT) ceramics. The strain and polarization gradient have been utilized to determine the elastocaloric and piezocaloric effects, respectively. Almost similar values are obtained up to the phase transition point (390 K), beyond which a large difference is ob-served. A peak elastocaloric temperature change of 1.9 K was obtained for an applied compressive stress of 0-400 MPa (450 K). Conversely, a maximum piezocaloric effect of 1.7 K is observed for stress values of 0-300 MPa (390 K). Overall, this study allows one to easily differentiate between caloric effects arising from polarization and strain changes.
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