Title: Room-temperature electrocaloric effect in (1−<italic>x</italic>)Ba0.67Sr0.33TiO3-<italic>x</italic>Ba0.9Ca0.1Ti0.9Zr0.1O3 ceramics under moderate electric field.
Authors: Xu, Zunping; Qiang, Hua; Chen, Yi; Liu, Gang
Abstract: The electrocaloric effect (ECE) was investigated in (1−x)Ba0.67Sr0.33TiO3-xBa0.9Ca0.1Ti0.9Zr0.1O3 (BST-xBCTZ, x = 0, 0.05, 0.1 and 0.2) ceramics synthesized using citrate-nitrate combustion derived powders. The dielectric spectroscopy revealed that the phase transition temperature increases with increasing x. The ECE was calculated using the Maxwell relation based on the P-E hystersis loops. The addition of BCTZ has notable effect on the microstructure and ECE of ceramic samples. The most promising electrocaloric temperature change (△T) of 0.74 K and electrocaloric responsivity (△T/△E) of 0.247 × 10−6 K m V−1 were obtained in BST-0.05BCTZ ceramic under a moderate electric field of 30 kV/cm near cubic-to-tetragonal phase transition temperature.
Subjects: PYROELECTRICITY; TITANIUM oxides; CRYSTALLOGRAPHY; TITANIUM compounds; CERAMICS
Publication: Journal of Materials Science: Materials in Electronics, 2018, Vol 29, Issue 9, p7227
ISSN: 0957-4522
Publication type: Academic Journal
DOI: 10.1007/s10854-018-8711-2

Room-temperature electrocaloric effect in (1−<italic>x</italic>)Ba<sub>0.67</sub>Sr<sub>0.33</sub>TiO<sub>3</sub>-<italic>x</italic>Ba<sub>0.9</sub>Ca<sub>0.1</sub>Ti<sub>0.9</sub>Zr<sub>0.1</sub>O<sub>3</sub> ceramics under moderate electric field.

Xu, Zunping; Qiang, Hua; Chen, Yi; Liu, Gang