The electrocaloric effect in BaTiO3thick film multilayer structure at high electric field

Yang Bai, Kai Ding, Guangping Zheng, San-Qiang Shi, Liejie Qiao, Dong Guo

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

4 Citations (Scopus)

Abstract

We demonstrated the superior electrocaloric effect (ECE) in BaTiO3multilayer 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 Vmax=25 V. The BaTiO3thick 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 BaTiO3is 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.
Original languageEnglish
Title of host publicationHigh-Performance Ceramics VII
Pages1304-1307
Number of pages4
DOIs
Publication statusPublished - 29 Jun 2012
Event7th China International Conference on High-Performance Ceramics, CICC-7 - Xiamen, China
Duration: 4 Nov 20117 Nov 2011

Publication series

NameKey Engineering Materials
Volume512-515
ISSN (Print)1013-9826

Conference

Conference7th China International Conference on High-Performance Ceramics, CICC-7
Country/TerritoryChina
CityXiamen
Period4/11/117/11/11

Keywords

  • Electrocaloric effect
  • Ferroelectric ceramics
  • Thick film

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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