Densification and phase formation in seeded, reactively sintered Sr0.53Ba0.47Nb2O6 ceramics

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Abstract

Sr0.53Ba0.47Nb2O6 (SBN53) ceramics were reactively sintered from SrNb2O6 and BaNb2O6 powders. The formation temperature decreased from 1260°C for unseeded samples to 1130°C for the samples with 15.4 wt% seeds plus 0.85 mol% V2O5 at a heating rate of 4°C/min. For the V2O5-free samples, the activation energy was lowered from 554 ± 15 kJ/mol for unseeded samples to 241 ± 17 kJ/mol for the samples with 15.4 wt% seeds. In the V2O5-containing samples, densification and phase formation occurred simultaneously. In the V2O5-free samples, however, phase formation was completed before densification. In both cases, ceramics with ≥95% relative density were obtained. In all cases, SBN53 formed directly, rather than via a variety of intermediate SBN solid solutions. The microstructure evolution was also studied.

Original languageEnglish (US)
Pages (from-to)5041-5049
Number of pages9
JournalJournal of Materials Science
Volume37
Issue number23
DOIs
StatePublished - Dec 1 2002

All Science Journal Classification (ASJC) codes

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

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