Thermal decomposition of Mg-Al hydroxides coprecipitated in the presence of oxalate ions

Enrico Traversa*, P. Nunziante, G. Chiozzini

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The thermal decomposition of Mg-Al hydroxides coprecipitated from nitrate solutions in the presence of oxalate ions has been studied. Samples were prepared with Mg/Al atomic ratios of 2:1 and 1:2. The coprecipitation products were always characterized by the presence of an Mg-Al mixed hydroxide containing oxalate ions in the interlayer sheet. Decomposition of the separately precipitated mixed phase passes through formation of the corresponding carbonated phase before reaching MgO and MgAl2O4. The mechanism of spinel formation from thermal decomposition of hydroxide mixtures is strongly influenced by the presence of oxalate ions in the mixed phase.

Original languageEnglish (US)
Pages (from-to)25-33
Number of pages9
JournalThermochimica Acta
Volume199
Issue numberC
DOIs
StatePublished - May 1 1992

ASJC Scopus subject areas

  • Instrumentation
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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