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Fine zirconium diboride (ZrB2) powders with high purity were successfully prepared by combustion synthesis through magnesiothermic reduction process in Mg–B2O3–ZrO2 system. The reaction mechanism was investigated by differential thermal analysis and quenching experiment. The results show that the whole magnesiothermic reduction process includes three stages: first, molten B2O3 and Mg formed above...
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