Preparation of nanocrystalline ferroelectric CaBi2Ta 2O9 by the urea method

S. P. Gaikwad, Renu Pasricha, V. Ravi

Research output: Contribution to journalArticlepeer-review


A precipitate was formed when a aqueous solution of CaCl2, BiCl3, TaF5 and urea in stoichiometric ratio (total metal cations to urea ratio is 5) is heated on a water bath. This precipitate on decomposition at 600 °C yielded the nanocrystallites of ternary oxide CaBi2Ta2O9 (CBT) as confirmed by X-ray diffraction (XRD). Particle size and morphology was studied by transmission electron spectroscopy (TEM). Ferroelectric hysteresis loop parameters such as remnant polarization (Pr) and coercive field (EC) were also determined. TEM investigations revealed that the average particle size of the polycrystalline powder is 70 nm. The room temperature dielectric constant was found to be 110.

Original languageEnglish (US)
Pages (from-to)773-775
Number of pages3
JournalCeramics International
Issue number6
StatePublished - 2005


  • A. Powders: chemical preparation
  • B. Electron microscopy
  • C. Dielectric properties
  • C. Ferroelectric properties

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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