Phase formation and reactions in the Bi2O3-ZnO-Nb2O5-Ag pyrochlore system

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Mixed-phase compositions in the Bi2O3-ZnO-Nb2O5 pyrochlore system have been previously identified as potential low-fire dielectric composites for high-frequency multilayer devices. However, there has been a problem with the ability to co-process this material with silver. It was found that an intermediate BiNbO4 phase that occurs during calcination can interact with silver during co-sintering, forming a deleterious phase. Processing routes to control the presence of remanent BiNbO4 were investigated, such as ZnO stoichiometric adjustment, low partial pressure of oxygen sintering atmosphere, and specific temperature-time dwells.

Original languageEnglish (US)
Pages (from-to)1460-1464
Number of pages5
JournalJournal of Materials Research
Issue number5
StatePublished - May 2001

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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