High dielectric tunability of ferroelectric (Ba1-x,Srx)(Zr0.1,Ti0.9)O3ceramics

N. Y. Chan, S. H. Choy, D. Y. Wang, Y. Wang, Jiyan Dai, H. L.W. Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

16 Citations (Scopus)

Abstract

(Ba1-x,Srx)(Zr0.1,Ti0.9)O3(BSZT) ceramics with x = 0, 0.05, 0.15, 0.25, 0.35 and 0.45 were prepared by conventional solid state reaction method. The structural characterization with X-ray diffraction and scanning electron microscopy indicate a monotonical drop in lattice constants and grain size with the increase of Sr concentration. Consequently, the Curie temperature and remnant polarization of the ceramics exhibit a strong compositional dependence. A linear relationship between the Curie temperature and Sr concentration is revealed. At x = 0.45, the BSZT ceramics show substantially high tunability of over 55 % under 20 kV/cm dc electric field with very low dielectric loss value of 0.0025 at room temperature, suggesting the BSZT ceramics could be a promising alternative to traditional (Ba,Sr) TiO3ferroelectrics for developing high frequency tunable dielectric devices.
Original languageEnglish
Pages (from-to)2589-2594
Number of pages6
JournalJournal of Materials Science: Materials in Electronics
Volume25
Issue number6
DOIs
Publication statusPublished - 1 Jan 2014

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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