Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/12779
Title: The electrocaloric effect in BaTiO 3 thick film multilayer structure at high electric field
Authors: Bai, Y
Ding, K
Zheng, GP 
Shi, SQ 
Qiao, L
Guo, D
Keywords: Electrocaloric effect
Ferroelectric ceramics
Thick film
Issue Date: 2012
Publisher: Scientific.Net
Source: Key engineering materials, 2012, v. 512-515, p. 1304-1307 How to cite?
Journal: Key engineering materials 
Abstract: We demonstrated the superior electrocaloric effect (ECE) in BaTiO 3 multilayer structure. The sample fabricated by tape-casting process has 120 effective ferroelectric layers with average layer thickness of 1.7 μm. The ferroelectric hysteresis loops were measured in the temperature range from 30 to 180 °C, and then the temperature dependences of ECE adiabatic temperature change and heat absorption were obtained according to Maxwell relation. A peak ECE adiabatic temperature change of 0.027 K/V and heat absorption of 0.36 J/g were observed near the ferroelectric phase transition at 125 °C under V max=25 V. The BaTiO 3 thick film can sustain an external electric field (>500 kV/cm) several times higher than bulk ferroelectric ceramics (∼30 kV/cm). Although the EC coefficient of BaTiO 3 is much lower than lead-based ferroelectric ceramics, the ultrahigh working electric field endows it a large ECE, higher than that of most reported lead-based ferroelectric ceramics. In addition, the lead-free composition provides it a promising future in solid-state cooling technology.
Description: 7th China International Conference on High-Performance Ceramics, CICC-7, Xiamen, 4-7 November 2011
URI: http://hdl.handle.net/10397/12779
ISSN: 1013-9826
EISSN: 1662-9795
DOI: 10.4028/www.scientific.net/KEM.512-515.1304
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