A high-tolerance BNT-based ceramic with excellent energy storage properties and fatigue/frequency/thermal stability

Hua Wang, Qiang Hu, Xiaoqin Liu, Qiaoji Zheng, Na Jiang, Yang Yang, K. W. Kwok, Chenggang Xu, Dunmin Lin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

28 Citations (Scopus)

Abstract

A novel perovskite lead-free solid solution of (Ba0.06Bi0.47Na0.47)1-xLaxTi1-yZryO3 were designed by dual-substitution of La3+ and Zr4+ for (Ba0.06Bi0.47Na0.47)2+ and Ti4+. The frequency-, temperature- and fatigue-dependent energy storage properties of the materials were investigated. After the dopings of La3+ and Zr4+, the crystal structure of the ceramics remains unchanged; and tetragonal and rhombohedral phases coexist in all ceramics which exhibit a relaxor phase transition. The co-substitution of La3+ and Zr4+ leads to the high dielectric breakdown strength (DBS), large spontaneous polarization (Ps) and small remnant polarization (Pr) of the materials. The optimum energy storage properties are achieved at x/y = 0.02/0.04, giving high recoverable energy storage density of Wrec ~1.55 J/cm3, excellent energy storage efficiency of ƞ ~72.6% and large dielectric breakdown strength of DBS ~136 kV/cm. Furthermore, the ceramic with x/y = 0.02/0.04 possesses superior durability of frequency (~2–60 Hz), fatigue (~ 103) and temperature (~ 25–245 °C).

Original languageEnglish
Pages (from-to)23233-23240
Number of pages8
JournalCeramics International
Volume45
Issue number17
DOIs
Publication statusPublished - 1 Dec 2019

Keywords

  • BiNaTiO
  • Energy storage properties
  • Fatigue
  • Frequency
  • Solid solution
  • Thermal stability

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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