Molten Salt Synthesis of Magnesium Aluminate (MgAl2O4) Spinel Powder |
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| Authors: | Shaowei Zhang Daniel Doni Jayaseelan Goutam Bhattacharya William Edward Lee |
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| Affiliation: | Department of Engineering Materials, The University of Sheffield, Sheffield S1 3JD, UK |
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| Abstract: | MgAl2O4 (MA) spinel powder was synthesized by heating an equimolar composition of MgO and Al2O3 in LiCl, KCl, or NaCl. The synthesis temperature can be decreased from >1300°C (required by the conventional solid–solid reaction process) to ～1100°C in LiCl, or to ～1150°C in KCl or NaCl. The molten salt synthesized MA powder was pseudomorphic and retained, to a large extent, the size and morphology of the original Al2O3 raw material, indicating that a "template formation mechanism" plays an important role in the synthesis process. |
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