Synthesis of highly tetragonal BaTiO3 nanopowders by a two-step alkoxide-hydroxide route

Mi Ri Joung, Jin Seong Kim, Myung Eun Song, Jae Hong Choi, Sahn Nahm, Chang Hak Choi, Tae Hyun Sung

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

BaTiO3 (BT) nanopowders were synthesized using the alkoxide-hydroxide route. Formation of BT nanopowders commenced at 60 °C and their amount increased with increasing temperature. However, a TiO2 second phase was always developed at temperatures higher than 100 °C due to the insufficient amount of H2O caused by its evaporation. Therefore, a two-step process is presented herein for the synthesis of homogeneous, highly tetragonal BT nanopowders. The cubic BT nanopowders were synthesized at 100 °C and subsequently heated to high temperatures (>200 °C) to increase their tetragonality. Homogeneous BT nanopowders with an average size of 94.8 nm and a high c/a ratio of 1.0081 were obtained for the specimens synthesized at 260 °C for 60 h after the formation of the cubic BT nanopowders at 100 °C for 20 h.

Original languageEnglish
Pages (from-to)9089-9092
Number of pages4
JournalJournal of Alloys and Compounds
Volume509
Issue number37
DOIs
Publication statusPublished - 2011 Sep 15

Keywords

  • Chemical synthesis
  • Nanopowders
  • Nanostructured materials

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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