A novel process for low-density alumina foams has been studied. Aqueous acidic sucrose solution containing aluminium nitrate when concentrated by heating formed a viscous resin. The resin mixed well with aqueous alumina slurry and the resulting powder-filled resin underwent foaming on heating in a Teflon mould. The green foams produced had very good handling strength. Binder removal and sintering of the green foam prepared at sucrose to alumina weight ratio in the range 0.69-1.03 produced alumina foam bodies with porosities 93.5-96.7%.
Origin
Naval Materials Research Labs, India
Journal Title
Jacs 88 9 2005 2600-2603
Sector
Glass Ceramics
Class
GC 635