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Find the maximum temperature to which the following two magnesia

Find the maximum temperature to which the following two magnesia

Find the maximum temperature to which the following two magnesia–alumina refractory materials may be heated before a liquid phase will appear.
(a) A spinel-bonded alumina material of composition 95 wt% Al2O3-5 wt% MgO.
(b) A magnesia-alumina spinel of composition 65 wt% Al2O3-35 wt% MgO.
ConsultFigure.

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