Pillared montmorillonite clay as a raw material for the synthesis of β′-sialon

Z. Hrabé, Sridhar Komarneni, P. Malla, V. Srikanth, R. Roy

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12 Scopus citations

Abstract

To control the SiO2/Al2O3 ratio in a starting clay material for the synthesis of β′-sialon by the carbothermal nitridation process, montmorillonite was pillared with Al2O3. Conversions to sialon of pillared clay (31% Al2O3) and reference unpillared montmorillonite (18% Al2O3) have been compared. Pillared montmorillonite yielded a mixture of β′-sialon and various oxynitrides and oxycarbides of alumina as intermediate products. Pillared clay transformed faster during annealing than structural components of smectite alone. For the proper thermal treatment and clay/carbon ratio, both pillared and unpillared clays resulted in β′-sialon solid solutions.

Original languageEnglish (US)
Pages (from-to)4614-4618
Number of pages5
JournalJournal of Materials Science
Volume27
Issue number17
DOIs
StatePublished - Sep 1 1992

All Science Journal Classification (ASJC) codes

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

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