The primary and secondary electrocaloric effect at ferroelectric-ferroelectric transitions in lead-free ceramics

Haoyu Wang, Le Zhang, Yunlong Sun, Claudio Cazorla, Mengyao Guo, Ying Li, Kwok Ho Lam, Xiaojie Lou, Danyang Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)


Secondary electrocaloric effect (ECE) arising from piezoelectricity combined with crystal thermal expansion was often overlooked in ECE studies of ferroelectric ceramics. This work mainly evaluated the primary ECE (ΔTECE) and secondary ECE (∆T2) of eco-friendly BaSnxTi1 - xO3 (BSnT100x, 0 < x < 12%) ceramics near the tetragonal (T)-orthorhombic (O) transition. Intriguingly, a maximum overall ΔT ~ 0.85 K was obtained at the T-O transition (~300 K) of BSnT2 under an electric field of 2 kV/mm, with ∆TECE and ∆T2 amounting to ~0.75 K, ~0.1 K, respectively. This ECE result is ~40% superior than the larger ECE reported previously for BSnT system.

Original languageEnglish
Pages (from-to)150-154
Number of pages5
JournalScripta Materialia
Publication statusPublished - 15 Mar 2020


  • Phonon vibrational entropy
  • Primary electrocaloric effect
  • Secondary electrocaloric effect

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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