Publication Date:
2014-09-10
Description:
The electrocaloric effect in lead-free BaTi 1−x Sn x O 3 (BTSn, x = 0.08, 0.105, and 0.14) ferroelectric ceramics was studied by using an indirect method. It was found that the largest electrocaloric response could be achieved in BTSn with x = x QP = 0.105 near room temperature with an adiabatic temperature change Δ T of 0.61 K and an electrocaloric strength Δ T / Δ E of 0.31 K mm kV −1 , under a modest electric field Δ E of 20 kV cm −1 , which is comparable with the best values reported in lead-free materials. These enhanced values are attributed to the multiphase (four phases) coexistence at x = x QP corresponding to the quasi-quadruple point composition.
Print ISSN:
0003-6951
Electronic ISSN:
1077-3118
Topics:
Physics