Effect of MgO : AI2O3 mole ratio on the densification of magnesia-alumina precursor leading to spinel formation

Department of Chemical Technology, University of Calcutta·, 92 Acharya Prafulla Chandra Road, Kolkata-700 009, India E-mail: chemtech@cucc.ernet.in Fax: 91-033-3519755 Manuscript received 18 December 2001, accepted 23 May 2002 Magnesia-alumina precursor with different non-stoichiometric mole ratios of Al2O3 : MgO spinel system, were synthesized using semi-colloidal route. Sintering of the compacted powders was carried out at different temperatures (1400-1550º). Magnitude of densification of the sintered compacts was measured by various physicomechanical methods. The degree of non-stoichiometry in the spinel com position strongly affected the sintering process