Synthesis of Magnesium Aluminate Spinel Platelets from α-Alumina Platelet and Magnesium Sulfate Precursors |
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| Authors: | Shinobu Hashimoto Shaowei Zhang William Edward Lee Akira Yamaguchi |
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| Affiliation: | Department of Engineering Materials, The University of Sheffield, Sheffield S1 3JD, United Kingdom |
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| Abstract: | Spinel platelets were formed from a powder mixture of 3–5 μm wide and 0.2–0.5 μm thick α-Al2O3 and 1–8 μm (average 3 μm) MgSO4 heated 2 h at 1200°C. The hexagonal platelet shape of the original α-Al2O3 platelet was maintained in the spinel, although their size was slightly increased and their surface roughened. When a mixture of α-Al2O3 platelets and MgO powder was heated 3 h at 1400°C, the spinel formed lost the platelet morphology of the alumina. |
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| Keywords: | spinels alumina refractories synthesis |
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