Abstract
The specific features of burning in air the cylindrical samples obtained from the bulk density of magnesium powder are studied. We record a significant content of magnesium nitride in the reaction’s products as opposed to burning individual magnesium particles in air, which mainly results in the formation of magnesium oxide. The sample’s increased diameter leads to a significant decrease of the degree of magnesium’s transformation. It is shown that introduction of 1–15% of finely dispersed iron oxide powder leads to an increase in the degree of the chemical transformation of magnesium. The transformation is a two-stage process at the characteristic temperatures of 650 and 1050°С. The mechanism of the action of the iron oxide additive based on the multiple repetition of the reactions of substituting iron by magnesium in the oxide with the formation of free iron and its oxidation with the formation of a new portion of iron oxide is proposed.
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