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In order to improve the corrosion resistance of aluminosilicate refractories by molten aluminum, SrSO 4 and BaSO 4 powders were used. Mullite substrates with and without addition of 20wt.% SrSO 4 or BaSO 4 were sintered at 1400°C for 6h. Corrosion and wetting experiments with molten pure Al and Al–7.5Si were carried out at 900°C for 24h and 900°C for 2h, respectively...
In order to obtain mullite/zirconia composites, mixtures of aluminum dross and zircon were sintered. Aluminum dross was collected and purified by a milling, sieving and washing process. Stoichiometric mixtures of aluminum dross and zircon were sintered at several temperatures (1400, 1450 and 1500°C) for several periods of time (2, 4 and 6h). After the purifying treatment the dross contained mainly...
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