Interfacial precipitation in titania-doped diphasic mullite gels

Seong Hyeon Hong, Naesung Lee, Altaf H. Carim, Gary L. Messing

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Interfacial precipitation in sol-gel derived, titania-doped diphasic mullite gels was investigated using conventional and high resolution transmission electron microscopy. Rutile, anatase, and brookite precipitated on the interface between {110} planes of mullite and glass pockets in the sintered body. The formation of brookite may be attributable to the Si- and Al-rich environment during precipitation. Each polymorph of titania has a unique morphology and orientation relationship with mullite. Brookite exhibits a truncated pill box shape, and anatase displays a vermicular morphology. Quenching experiments suggest that the precipitates grow and undergo phase transformations during cooling.

Original languageEnglish (US)
Pages (from-to)974-978
Number of pages5
JournalJournal of Materials Research
Volume13
Issue number4
DOIs
StatePublished - Apr 1998

All Science Journal Classification (ASJC) codes

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

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