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Improved Thermal Shock Resistance of Magnesium Aluminate Spinel Ceramics by Aluminium Titanate Additions

Raw material mixtures with different maximum particle sizes of 20 μm, 1 mm, or 3 mm were used. The strength and the dynamic Young’s modulus of the spinel ceramic at room temperature were decreased by aluminium titanate, whereas the resistance to thermal shock, tested by water quenching from 950 °C, was enhanced. The dynamic Young’s modulus of the Al2TiO5-containing samples exhibited a pronounced hysteresis as a function of temperature.


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