Jump to main content
Jump to site search


Large electrocaloric effect over a wide temperature range in BaTiO3-modified lead-free ceramics

Author affiliations

Abstract

We report a large electrocaloric effect with an adiabatic temperature change (ΔT) of 0.47 K under 20 kV cm−1 combined with a broad temperature span (Tspan) of 23 K within 90% ΔT (maximum) attenuation in a (Ba0.87Ca0.13)(Ti0.87Hf0.13)O3 ceramic by indirect measurement. Here, in this (Ba0.87Ca0.13)(Ti0.87Hf0.13)O3 ceramic, Ca2+ and Hf4+ are introduced into BaTiO3 to obtain a multiphase coexisting region with a diffuse phase transition character. The large electrocaloric effect benefits from a larger number of possible equilibrium orientations of polar states due to multiphase coexistence, and the broad temperature span comes from the diffuse phase transition character. Compared to the control sample, BaTi0.82Hf0.18O3 with only diffuse transition but no multiphase coexistence, (Ba0.87Ca0.13)(Ti0.87Hf0.13)O3 displays a ΔT value nearly 1.5 times larger than that of BaTi0.82Hf0.18O3T ∼ 0.33 K), although they exhibit similar Tspan values. Our work may shed light on developing high performance electrocaloric materials with broad temperature ranges.

Graphical abstract: Large electrocaloric effect over a wide temperature range in BaTiO3-modified lead-free ceramics

Back to tab navigation

Publication details

The article was received on 04 Dec 2018, accepted on 26 Dec 2018 and first published on 29 Dec 2018


Article type: Paper
DOI: 10.1039/C8TC06110F
Citation: J. Mater. Chem. C, 2019, Advance Article
  •   Request permissions

    Large electrocaloric effect over a wide temperature range in BaTiO3-modified lead-free ceramics

    L. Zhao, X. Ke, Z. Zhou, X. Liao, J. Li, Y. Wang, M. Wu, T. Li, Y. Bai and X. Ren, J. Mater. Chem. C, 2019, Advance Article , DOI: 10.1039/C8TC06110F

Search articles by author

Spotlight

Advertisements