Reactive yttrium aluminate garnet powder via coprecipitation using ammonium hydrogen carbonate as the precipitant

Ji Guang Li, Takayasu Ikegami, Jong Heun Lee, Toshiyuki Mori, Yoshiyuki Yajima

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Abstract

Ammonium hydrogen carbonate was used as the precipitant to synthesize yttrium aluminate garnet (YAG) precursors from a mixed solution of aluminum and yttrium nitrates via coprecipitation. The carbonate precursor, with an approximate composition of NH4AlY0.6(CO3)1.9(OH)2 · 0.8H2O, transformed to pure YAG at 900 °C without the formation of intermediate phases. Reactive YAG powder was produced by calcining the precursor at 1100 °C. The YAG powder densified to 99.8% of the theoretical density by vacuum sintering at 1500 °C for 2 h, and the sintered body showed transparency. Less agglomeration of the precursor and good dispersity of the resultant YAG powder were responsible for the excellent sinterability.

Original languageEnglish
Pages (from-to)1864-1867
Number of pages4
JournalJournal of Materials Research
Volume15
Issue number9
DOIs
Publication statusPublished - 2000 Sep

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ASJC Scopus subject areas

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

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