Characteristics of Ag-doped BaTiO 3 nanopowders prepared by spray pyrolysis

You Na Ko, Yun Chan Kang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Pure and Ag-doped BaTiO 3 nanopowders were prepared by spray pyrolysis. Precursor powders, prepared from a spray solution with citric acid and ethylenediaminetetraacetic acid (EDTA) as chelating agents, had large, hollow particles irrespective of Ag doping. Both pure and Ag-doped powders had partially aggregated particles after post-treatment at 900°C that could be easily milled to nanoparticles. The mean sizes of the pure and Ag-doped BaTiO 3 particles were 75 and 91 nm, respectively. The Ag-doped particles were mainly of cubic BaTiO 3 crystal structure, with small Ag phases observed. High-density BaTiO 3 pellets were formed by sintering the powders at the low temperature of 1000°C. The silver was uniformly distributed in a tetragonal BaTiO 3 phase without phase separation in the doped pellet. The dielectric constants of the pellets formed from the pure and Ag-doped BaTiO 3 powders were 1826 and 2400, respectively.

Original languageEnglish
Pages (from-to)2071-2077
Number of pages7
JournalCeramics International
Volume38
Issue number3
DOIs
Publication statusPublished - 2012 Apr 1

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Keywords

  • Barium titanate
  • Dielectric material
  • Nano powder
  • Spray pyrolysis

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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