Journal
APPLIED PHYSICS LETTERS
Volume 109, Issue 16, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4965707
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Funding
- National Science Foundation of China [51372018]
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This paper demonstrated the electrocaloric effect (ECE) of (Na0.52K0.48-x)(Nb0.92-xSb0.08)O(3-)xLiTaO(3) lead-free ceramics by direct differential scanning calorimetry measurement and indirect thermodynamic method. Both results show good consistency, where the direct one more accurately depicts ECE value and its evolution according to phase diagram. Due to the diffuse orthorhombic-tetragonal phase transition, the samples show a broad ECE peak which shifts to lower temperature with increasing LiTaO3 amount. Compared to previous direct results in lead-free ceramics at corresponding temperatures, they show a competitive ECE performance with Delta T-max of 0.41 K (@80 degrees C), 0.30K (@ 35 degrees C) and 0.16K (@ 15 degrees C) under 20 kV/cm fields for x = 0.02, 0.0375 and 0.045. Published by AIP Publishing.
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