Materials Research Letters (Jul 2018)

Giant negative electrocaloric effect in B-site non-stoichiometric (Pb0.97La0.02)(Zr0.95Ti0.05)1+yO3 anti-ferroelectric ceramics

  • Zhong-Hua Niu,
  • Yan-Ping Jiang,
  • Xin-Gui Tang,
  • Qiu-Xiang Liu,
  • Wen-Hua Li,
  • Xiong-Wei Lin,
  • Sheng-Guo Lu

DOI
https://doi.org/10.1080/21663831.2018.1466737
Journal volume & issue
Vol. 6, no. 7
pp. 384 – 389

Abstract

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A negative electrocaloric effect (ECE) in B-site non-stoichiometric (Pb0.97La0.02)(Zr0.95Ti0.05)O3 antiferroelectric ceramics synthesized by the conventional solid-state reaction method is investigated via indirect and direct measurements. Temperature-dependent P-E hysteresis loops were measured. A giant negative electrocaloric temperature change of about 12.45 K was achieved. The results indicate that the antiferroelectric ceramics with non-stoichiometry modification could be a promising candidate for the applications in cooling devices. IMPACT STATEMENT Giant negative electrocaloric effect (NECE) was achieved in B-site non-stoichiometric PLZT2/95/5 ceramics, the NECE parameters are comparable or even larger than most of the reported bulk materials, making it attractive for cooling devices application.

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