Sol–Gel Synthesis of Strontium Pyroniobate and Calcium Pyroniobate

Alamanda V. Prasadarao, Ulagaraj Selvaraj, Sridhar Komarneni, Amar S. Bhalla

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Strontium and calcium pyroniobates were prepared by a sol–gel process, using strontium/calcium metal and niobium ethoxide as precursors. The formation of Sr2Nb2O7 occurred at 750°C via an intermediate perovskite phase of composition close to Sr0.82NbO3. The crystallization of Ca2Nb2O7 occurred at 600°C directly without any intermediate phases. Sintered Sr2Nb2O7 and Ca2Nb2O7 pellets showed a preferred grain orientation. Microstructural studies revealed an increase in grain growth and associated orientation with sintering temperature.

Original languageEnglish (US)
Pages (from-to)2697-2701
Number of pages5
JournalJournal of the American Ceramic Society
Issue number10
StatePublished - Oct 1992

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry


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