In this study, we report on investigation of the electrocaloric (EC) effect in lead-free Ba(SnxTi1-x)O3 (BSnT) ceramics with compositions in the range of 0.08 ≤ x ≤ 0.15 by the direct measurement method using a differential scanning calorimeter. The maximum EC temperature change, ΔTEC-max = 0.63 K under an electric field of 2 kV/mm, was observed for the composition with x = 0.11 at ∼44 °C around the multiphase coexistence region. We observed that the EC effect also peaks at transitions between ferroelectric phases of different symmetries. Comparison with the results of indirect EC measurements from our previous work shows that the indirect approach provides reasonable estimations of the magnitude of the largest EC temperature changes and EC strength. However, it fails to describe correctly temperature dependences of the EC effect for the compositions showing relaxor-like behaviour (x = 0.14 and 0.15) because of their non-ergodic nature. Our study provides strong evidence supporting that looking for multiphase ferroelectric materials can be very useful to optimize EC performance.
Skip Nav Destination
Article navigation
23 October 2017
Research Article|
October 23 2017
Direct measurement of electrocaloric effect in lead-free Ba(SnxTi1-x)O3 ceramics Available to Purchase
Mehmet Sanlialp
Vladimir V. Shvartsman
Xianzhu Wei
a)
M. Sanlialp, Z. Luo, and X. Wei contribute equally to this work.
b)
Email: [email protected].
c)
Present address: Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
Appl. Phys. Lett. 111, 173903 (2017)
Article history
Received:
August 22 2017
Accepted:
October 12 2017
Citation
Mehmet SanlialpZhengdong LuoVladimir V. ShvartsmanXianzhu WeiYang LiuBrahim DkhilDoru C. Lupascu; Direct measurement of electrocaloric effect in lead-free Ba(SnxTi1-x)O3 ceramics. Appl. Phys. Lett. 23 October 2017; 111 (17): 173903. https://doi.org/10.1063/1.5001196
Download citation file:
