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Ferroelectric phase transition has been identified as a promising avenue for designing high-performance electrocaloric materials for zero-emission and solid-state refrigeration. However, extensive research has been limited to developing ferroelectric materials with large electrocaloric effects near room temperature, preventing them from meeting diverse refrigeration requirements. In this study, by leveraging the room-temperature phase diagram of the (PbLa)(ZrTi)O3 solution, we prepared a series of Pb0.775La0.15ZrxTi1−xO3 bulk ceramics spanning the ferroelectric and relaxor ferroelectric phase regions. This enabled the attainment of various phase transition features and temperatures. Finally, large electrocaloric effects, coupled with adjustable operation temperatures ranging from 150 to −45 °C, are successfully achieved through manipulation of the Zr/Ti ratio. This comprehensive range of operation temperatures effectively addresses diverse refrigeration application requirements, ranging from industrial equipment to freezer cabinets. This work not only underscores the expansion of the electrocaloric refrigeration application domain but also proposes a material design strategy tailored to meet these evolving demands.
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