Classification and main uses of highly active magnesium oxide

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Classification and main uses of highly active magnesium oxide

2022-05-31

Magnesium oxide is one of the main raw materials of magnesium cementitious materials. According to the calcination production process, it can be divided into light-burned magnesium oxide and dead-burned magnesium oxide. Activated magnesia is divided into high activity, medium activity and low activity according to the quality of iodine absorption (the activated magnesia used in the magnesite industry belongs to high activity magnesia).

Light magnesia refers to magnesium oxide formed from magnesium compounds after magnesite is calcined at 700-900 degrees Celsius, also known as active magnesium oxide. The chemical formula is MgO, the relative molecular weight is 40.3, the melting point is 2800 degrees Celsius, and the boiling point is 3600 degrees Celsius , Odorless, tasteless, non-toxic, insoluble in pure water and organic solvents, water-soluble due to the presence of carbon dioxide, soluble in acid or ammonium salt solution, easily soluble.

Properties and Application of Highly Active Magnesium Oxide

The specific surface area of highly active magnesia is much larger than that of ordinary industrial light magnesia and heavy magnesia. Highly active magnesium oxide is an important material for the preparation of inorganic materials, modern advanced electronic components and other harmful gas adsorbents. Highly active magnesium oxide has chemical activity and physical adsorption properties due to its fine shape and granular appearance.

The main domestic test method for highly active magnesium oxide is the iodine value test method, because the high activity magnesium oxide has high activity, good dispersibility, and is easy to compound with polymers or other materials.

Highly active magnesium oxide can be used as accelerator and activator for rubbers such as butyl rubber, neoprene, styrene-butadiene rubber and fluororubber. The activity of magnesium oxide can increase the crosslinking density of butyl rubber, thereby improving the physical properties of rubber stoppers. Highly reactive magnesium oxide is used as a filler for adhesives, plastics, paints and paper. Activated magnesia can also be used as ceramics, glass, thermal insulation materials and magnesia cement.

The characteristics of highly active magnesium oxide are magnesium oxide powder with high activity value. The use method is also affected by the season. For example, it is easy to absorb moisture to form magnesium hydroxide in summer.

Highly active magnesium oxide has fine particle morphology, high activity and adsorption performance, and is an important chemical raw material for the preparation of inorganic materials, electronic components, etc. The indicators of activated magnesium oxide are different from ordinary magnesium oxide. Due to its high activity and high dispersibility, activated magnesium oxide can even be made into fibrous magnesium oxide, which is easy to be compounded with polymers or other materials. Due to its high dispersibility, this ultrafine magnesium oxide can also be used as fillers for coatings, paper and cosmetics, fillers and reinforcements for plastics and rubbers, and auxiliary materials for various electronic materials, etc.

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