Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7022501 | Journal of Membrane Science | 2013 | 7 Pages |
Abstract
This paper reports the reinforcement of porous alumina ceramics by forming nickel aluminate spinel phase in an alumina matrix via the reaction between nickel (II) oxide and alumina. X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, three-point bending test and mercury porosimetry were used to characterise the porous ceramic samples. The highest bending strength of 146Â MPa was achieved in the porous alumina with 14.7Â wt% NiAl2O4 and a porosity of 30.5%. A decrease in bending strength and increase in porosity was observed in porous alumina with over 14.7Â wt% NiAl2O4. The appreciable bending strength and porosity made NiAl2O4 reinforcement a promising method for fabricating ceramic membranes with improved toughness in different geometries including hollow fibre membranes.
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Authors
Yi-Lan Elaine Fung, Huanting Wang,