Enhancing the densification of nanocrystalline TiO2 by reduction in spark plasma sintering

Jun Hong Noh, Hyun Suk Jung, In Sun Cho, Jae Sul An, Chin Moo Cho, Hyun Soo Han, Kug Sun Hong

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Fully densified TiO2 was obtained from spark plasma sintering (SPS) nanocrystalline rutile powder at a temperature of 720°C. The TiO 2 was densified under an applied pressure of 40 MPa at 720°C. However, the applied pressure was not great enough to cause plastic deformation within the TiO2 nanoparticle compact. Therefore, simple plastic deformation by applied pressure could not lead to the abrupt densification of TiO2 during the SPS. In this work, the abrupt densification of nanocrystalline TiO2 was examined at a low temperature in terms of the Joule heat caused by the flow of current through the compact due to the reduction of Ti4+ to Ti3+.

Original languageEnglish
Pages (from-to)993-997
Number of pages5
JournalJournal of the American Ceramic Society
Volume93
Issue number4
DOIs
Publication statusPublished - 2010 Apr

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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