Giant electrocaloric effect in lead-free Ba 0.94 Ca 0.06 Ti 12x Sn x O 3 ceramics with tunable Curie temperature - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Applied Physics Letters Année : 2015

Giant electrocaloric effect in lead-free Ba 0.94 Ca 0.06 Ti 12x Sn x O 3 ceramics with tunable Curie temperature

Résumé

Electrocaloric effect in lead-free Ba0.94Ca0.06Ti1−xSnxO3 ceramics is studied using an indirect method. The Ba0.94Ca0.06Ti0.875Sn0.125O3 ceramic located near a multi-phase point shows best electrocaloric performance, which provides further experimental evidence for optimizing electrocaloric properties through constructing multiphase coexistence. Giant electrocaloric efficiency (∼0.4 K mm/kV) is achieved in this ceramic at about room temperature at a low electric field of 6 kV/cm. While large electrocaloric temperature (∼0.63 K) is obtained by further enhancing electric field (20 kV/cm), a decrease in electrocaloric efficiency (0.32 K mm/kV) is simultaneously observed, which is attributed to phase transition from first-order to more diffusive second-order under higher electric field.
Fichier non déposé

Dates et versions

hal-01284720 , version 1 (08-03-2016)

Identifiants

Citer

Xiangjian Wang, Fang Tian, Chunlin Zhao, Jiagang Wu, Yang Liu, et al.. Giant electrocaloric effect in lead-free Ba 0.94 Ca 0.06 Ti 12x Sn x O 3 ceramics with tunable Curie temperature. Applied Physics Letters, 2015, 107, pp.252906. ⟨10.1063/1.4938134⟩. ⟨hal-01284720⟩
94 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More