Large Electrocaloric Effect in Lead-Free (Ba 0.85 Ca 0.15 )(Zr 0.1 Ti 0.9 )O₃ Ceramics Prepared via Citrate Route
The 1 wt % Li-doped (Ba Ca )(Zr Ti )O₃ (BCZT-Li) ceramics prepared by the citrate method exhibit improved phase purity, densification and electrical properties, which provide prospective possibility to develop high-performance electrocaloric materials. The electrocaloric effect was evaluated by phen...
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Published in | Materials Vol. 10; no. 9; p. 1093 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Switzerland
MDPI
18.09.2017
MDPI AG |
Subjects | |
Online Access | Get full text |
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Summary: | The 1 wt % Li-doped (Ba
Ca
)(Zr
Ti
)O₃ (BCZT-Li) ceramics prepared by the citrate method exhibit improved phase purity, densification and electrical properties, which provide prospective possibility to develop high-performance electrocaloric materials. The electrocaloric effect was evaluated by phenomenological method, and the BCZT-Li ceramics present large electrocaloric temperature change ∆
, especially large electrocaloric responsibility
= ∆
/∆
, which can be comparable to the largest values reported in the lead-free piezoelectric ceramics. The excellent electrocaloric effect is considered as correlating with the coexistence of polymorphic ferroelectric phases, which are detected by the Raman spectroscopy. The large
value accompanied by decreased Curie temperature (around 73 °C) of the BCZT-Li ceramics prepared by the citrate method presents potential applications as the next-generation solid-state cooling devices. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1996-1944 1996-1944 |
DOI: | 10.3390/ma10091093 |