Synthesis of highly tetragonal BaTiO3 nanopowders using acetone as a solvent by alkoxide-hydroxide route

Mi Ri Joung, In Tae Seo, Jin Seong Kim, Jae Hong Choi, Sahn Nahm, Chang Hak Choi, Tae Hyun Sung

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

BaTiO3 (BT) nanopowders were synthesized in acetone to remove the TiO2 second phase, which was formed in the specimens synthesized in the 2-methoxyethanol solvent at above 100 °C due to H2O evaporation. No TiO2 second phase was formed in the specimens synthesized in acetone, even at 260 °C, due to the low boiling temperature of acetone which evaporated at above 55 °C and suppressed the H2O evaporation by increasing the vapor pressure in the vessel. However, for the BT nanopowders synthesized at 250 °C for 60 h, TiO2 second phase was formed at a Ba/Ti ratio of ≤1:5 and the BT nanopowders were agglomerated at a ratio of ≥3:0. Homogeneous BT nanopowders were obtained at a ratio of 2.0 and they exhibited a high c=a ratio of 1.0082 with a small size of 95.2 nm. Therefore, these nanopowders can be a good candidate for future multilayer ceramic capacitor.

Original languageEnglish
Article number035002
JournalJapanese journal of applied physics
Volume50
Issue number3
DOIs
Publication statusPublished - 2011 Mar

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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