Densification and anisotropic grain growth in Sr2Nb2O7

B. Brahmaroutu, G. L. Messing, S. Trolier-McKinstry

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19 Scopus citations

Abstract

Sr:Nb stoichiometry and donor-doping with La were found to affect densification behavior and anisotropic grain growth in Sr2Nb2O7 ceramics. La-doping improved the high temperature a.c. resistivity, but inhibits grain growth by grain boundary pinning. The presence of excess Nb was found to promote anisotropic grain growth by forming a liquid at the grain boundaries in both undoped and doped Sr2Nb2O7. Anisotropic grain growth in La-doped Sr2Nb2O7 can be controlled by incorporating large template particles in a Nb-rich matrix. High sintered densities (approx. 98% of theoretical) were achieved in both undoped and La-doped samples.

Original languageEnglish (US)
Pages (from-to)5673-5680
Number of pages8
JournalJournal of Materials Science
Volume35
Issue number22
DOIs
StatePublished - Nov 2000

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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