Microwave-hydrothermal synthesis and characterization of barium titanate powders

Bharat L. Newalkar, Sridhar Komarneni, Hiroaki Katsuki

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119 Scopus citations

Abstract

The synthesis of barium titanate (BaTiO3) has been investigated under microwave-hydrothermal (M-H) conditions in the temperature range of 60-160°C using BaCl2, and TiCl4 as Ba, and Ti sources, respectively. The crystallized products were characterized by powder X-ray diffraction (XRD), scaning electron microscopy (SEM), thermogravimetric analysis (TGA), transmission electron microscopy (TEM), and particle-size analysis techniques. The results showed the crystallization of BaTiO3 phase at all the synthesis temperatures along with the formation of BaCO3 as a minor impurity. The crystallization of BaTiO3 powder having an average crystallite size of 0.3 μm with CO32- content of 0.8% was achieved at 160°C in the presence of 10 M NaOH in 3 h. These results show that the M-H synthesis route is rapid, cost effective, and could serve as an alternative to obtain BaTiO3 powders with submicron particle size.

Original languageEnglish (US)
Pages (from-to)2347-2355
Number of pages9
JournalMaterials Research Bulletin
Volume36
Issue number13-14
DOIs
StatePublished - Nov 1 2001

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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