Cation grain-boundary diffusivity in SiO2- and MgO-doped Al2O3

Lin Feng, Shen J. Dillon

Research output: Contribution to journalArticlepeer-review


Cation grain-boundary diffusion in undoped and aliovalent-doped Al2O3 is characterized using Cr2O3 as a chemical tracer. The compositional depth profiles measured by secondary ion mass spectrometry are fitted to the Whipple-LeClaire model. The results indicate that cation grain-boundary diffusivity is insensitive to MgO and SiO2 dopants between 1100°C and 1300°C.

Original languageEnglish (US)
Pages (from-to)5379-5384
Number of pages6
JournalJournal of the American Ceramic Society
Issue number12
StatePublished - Dec 2017


  • alumina
  • diffusion/diffusivity
  • dopants/doping
  • grain boundaries

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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