Dielectric, ferroelectric properties, and grain growth of CaxBa1-xNb2O6ceramics with tungsten-bronzes structure

Shanming Ke, Huiqing Fan, Haitao Huang, H. L.W. Chan, Shuhui Yu

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34 Citations (Scopus)

Abstract

Dielectric properties, microstructures, and phase transition behaviors of α and β phases of Cax Ba1-xNb2O6(x=0.22, 0.30, and 0.38) ceramics were investigated. All the three compositions had partially filled tungsten-bronze structure (TTB) and relatively high Curie temperatures (up to 345°C) compared with Sr1-xBaxNb2O6. The α phase exhibits unambiguously a diffused phase transition, while the β phase is associated with an incommensurate phase and needs to be further studied. The dielectric and ferroelectric properties of CaxBa1-xNb2O6ceramics were strongly processing-dependent. A mechanism was proposed to explain the grain growth behavior of TTB ceramic niobates.
Original languageEnglish
Article number024101
JournalJournal of Applied Physics
Volume104
Issue number2
DOIs
Publication statusPublished - 12 Aug 2008

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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