Abstract
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 language | English |
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Pages (from-to) | 150-154 |
Number of pages | 5 |
Journal | Scripta Materialia |
Volume | 178 |
DOIs | |
Publication status | Published - 15 Mar 2020 |
Keywords
- Phonon vibrational entropy
- Primary electrocaloric effect
- Secondary electrocaloric effect
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys