Synthesis and sintering of Ca0.5Sr0.sZr4P6024 powders by the decomposition/combustion of Ca-, Sr-, nitrate-ammonium dihydrogen phosphate-urea mixtures

Chang S. Hong, P. Ravindranathan, Dinesh Kumar Agrawal, Rustum Roy

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Abstract

Ca0.5Sro.5Zr4P6C>24 (CSZP) powders were prepared by the decomposition/combustion method using Ca(N03)2 • 4H20, Sr(N03)2? Zr0(N03)2 • xH20, NH4H2P04, urea, and NH4N03 as starting materials. The homogenized slurries of the mixture were heated at 500 °C for 5 min to obtain CSZP powders. The as-synthesized powders were amorphous and crystallized after heating 800 °C for 2 h. The specific surface area of the powder was varied with the batch weight of starting materials or the amount of urea and ammonium nitrate. Powders with high specific surface area (150 m2/g) could be produced by this method. The sinterability of the powders was comparable to that of sol-gel derived powders. The sintered density of the compacts was 99% of theoretical after firing in air at 1350 °C for 6 h.

Original languageEnglish (US)
Pages (from-to)2398-2403
Number of pages6
JournalJournal of Materials Research
Volume9
Issue number9
DOIs
Publication statusPublished - Jan 1 1994

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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