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Effect of sintering temperature and dwell time on electrocaloric properties of Ba0.85Ca0.075Sr0.075Ti0.90Zr0.10O3 ceramics

ABSTRACT In this work, lead-free Ba0.85Ca0.075Sr0.075Ti0.90Zr0.10O3 (BCSZT) ceramics were fabricated by conventional solid-state reaction route. The effect of sintering temperature on electrocaloric properties of BCSZT ceramics was studied in detail. Samples were sintered at different temperatures (1400–1500 °C) and dwell time (3–6 h). An enhanced electrocaloric behavior is demonstrated for BCSTZ ceramics at 1475 °C/4 h. Electrocaloric cooling of ~1.5 ± 0.1 K was found for BCSZT sample. This cooling was found in wide temperature range of 303–363 K. Further, the selected composition was observed to be among the better performing materials reported for electrocaloric refrigeration.