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Innovative cooling technologies are recognized by many industries as a crucial part of their system design. A large electrocaloric effect (ECE) and extended working temperature are the key issues hindering the realization of electrocaloric refrigeration technology. In this work, large ECE (Δ T = 0.8–0.9°C @ 4 kV/mm) with an ultrawide temperature span from 30 to 120°C is noted for lead‐free (Na 1/2 Bi 1/2 ) 0.80 Sr 0.20 (Zn 1/3 Nb 2/3 ) x Ti 1‐ x O 3 ceramics. The excellent ECE performance can be ascribed to the evolution of polar nanoregions. Our work suggests that this material is promising for applications in solid‐state refrigeration systems with a broad range of operating temperatures.
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Wei et al. (2021) studied this question.
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