Thermo-electrical energy conversions in Bi0.5Na0.5TiO3-BaTiO3thin films prepared by sol-gel method

Xiu Cheng Zheng, Guangping Zheng, Zheng Lin, Zhi Yuan Jiang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

34 Citations (Scopus)

Abstract

Solid solution (1 - x)Bi0.5Na0.5TiO3-xBaTiO3(BNT-xBT) thin films with x = 0, 0.1, 0.9 and 1.0 are synthesized by sol-gel method. The as-prepared BNT-xBT films are crystallized into a single perovskite phase. The temperature-dependent polarizations of the thin films are measured to characterize their performances in thermo-electrical energy conversions. In BNT-0.1BT it is found that the electro-caloric refrigeration temperature change is 3.3 °C with the application of an electric field of 862 kV/cm at 46 °C. The density of electrical energy generating from a 10 °C temperature variation cycle is 0.68 J/cm3. The results demonstrate that BNT-0.1BT lead-free ferroelectrics are excellent environmental-friendly energy materials for electro-caloric refrigeration and pyroelectric energy harvesting applications near room temperature.
Original languageEnglish
Pages (from-to)125-128
Number of pages4
JournalThin Solid Films
Volume522
DOIs
Publication statusPublished - 1 Nov 2012

Keywords

  • Electro-caloric effect
  • Lead-free ferroelectrics
  • Pyroelectric properties
  • Sol-gel preparation
  • Thin films

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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