Electrocaloric response near room temperature in Zr- and Sn-doped BaTiO3 systems

Ying Hou, Lu Yang, Xiaoshi Qian, Tian Zhang, Q. M. Zhang

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Abstract

The electrocaloric effect (ECE) in (1 - x)BaZr0.18Ti0.82O3-(x)BaSn0.11Ti0.89O3(BZT18-BST11, 0.1 ≤ x ≤ 0.5) ceramics is investigated near room temperature using a calorimetry method. The ceramics exhibit relaxor-like ferroelectric characteristics and by merging phases, a large electrocaloric (EC) response is observed in the system. The largest entropy change is 4.8 Jkg-1 K-1 (along with a temperature change of 3.5 K), which is induced under an electric field of 10 MV m-1 for the 0.8 BaZr0.18 Ti0.82O3 -0.2 BaSn0.11Ti0.89O3 ceramics. This result reveals that the coexistence of multiple phases improves the ECE of the ceramics, which provides an effective route to achieve a large EC response using a small electric field. This article is part of the themed issue 'Taking the temperature of phase transitions in cool materials'.

Original languageEnglish (US)
Article number20160055
JournalPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Volume374
Issue number2074
DOIs
StatePublished - Aug 13 2016

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All Science Journal Classification (ASJC) codes

  • Mathematics(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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