The solid-phase interaction of X-ray amorphous alumina samples with sodium carbonate at 500-900°C has been studied as affected by the history of an alumina sample. Five procedures were tested for alumina synthesis: the decomposition of Al(NO3)3·9H2O; Al 2(C2O4)3·nH2O; hydroxides prepared by Al3+ ion precipitation from aluminum nitrate or aluminum chloride solutions by concentrated aqueous NH4OH taken in 20% excess; or a hydroxide prepared by freeze-drying of frozen cryogranules of a colloidal aluminum hydroxonitrate solution. The behavior of X-ray amorphous alumina was significantly affected by its chemical history when it was in a solid phase with sodium carbonate.
|Number of pages
|Russian Journal of Inorganic Chemistry
|Published - Nov 2003
ASJC Scopus subject areas
- Materials Science (miscellaneous)
- Physical and Theoretical Chemistry
- Inorganic Chemistry