Pimkov Yu.V.

KINETICS OF SOLID-STATE MULLITE SYNTHESIS FROM ACTIVATED PRECURSORS

The solid-state synthesis kinetics of the mullite 3Al2O3∙2SiO2 from aluminium hydroxide and metasilicic acid was studied. Hydrated oxides obtained in an active form as a result of a mechanical acti-vation or co-precipitation (precursors) were subjected to a high-temperature treatment. The reaction rate was described by the kinetic first-order equation. Effective rate constants and energy activation were de-termined. The positive action of mullite seed crystals on the product accumulation was confirmed.
Key words: mullite, solid-state synthesis, kinetics, precursors, mechanical activation, co-precipitation, seed crystals

2016, Т. 59, № 1, Стр. 36-38
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