Article ID Journal Published Year Pages File Type
1477034 Journal of the European Ceramic Society 2007 6 Pages PDF
Abstract

ZnAl2O4 powder was synthesised by reacting equimolar ZnO and Al2O3 powders in alkaline chlorides (LiCl, NaCl or KCl). Formation of ZnAl2O4 started at about 700 °C in LiCl and 800 °C in NaCl and KCl. With increasing temperature, the amounts of ZnAl2O4 in the resultant powders increased with a concomitant decrease of ZnO and Al2O3. ZnAl2O4 powder was obtained by water-washing the samples heated for 3 h at 1000 °C (LiCl) or 1050 °C (NaCl and KCl). ZnAl2O4 formed in situ on Al2O3 grains from the surface inwards. The synthesised ZnAl2O4 grains retained the size and morphology of the original Al2O3 powders, indicating that a template formation mechanism dominated formation of ZnAl2O4 by molten salt synthesis.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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