Explain the difference between lightly burned magnesium oxide and activated magnesium oxide?

Light burned magnesium oxide: scientific name magnesium oxide. Wholesale of burnt magnesia sand

Its density is 2.94 and it appears as a light yellow or white powder. Its melting point is 2852 ℃ and its boiling point is as high as 3600 ℃. It can dissolve in acids and ammonium salts, but is difficult to dissolve in water and ethanol. Easily deliquescent in the air. It belongs to the category of pneumatic bonding materials.

Activated magnesium oxide, molecular formula MgO

Its relative molecular weight is 40.30. Its chemical composition, physical form and other indicators are not much different from ordinary magnesium oxide, but some indicators of active magnesium oxide are different from those of ordinary magnesium oxide; To achieve a suitable particle size distribution, the average particle size should be<2 μ m; m（2000nm）； The microstructure is irregular particles or nearly spherical particles or sheet-like crystals; The activity represented by citric acid (CAA value) is 12-25s (the lower the value, the higher the activity); The activity expressed by iodine absorption value is 80-120 (mgI2/100g MgO); The specific surface area is between 5-20m3/g, and the apparent specific volume is between 6-8.5mL/g. In addition, due to the high activity of this magnesium oxide, it is easy to absorb water and sometimes requires chemical treatment for protection. In some aspects, it exhibits special properties that conventional materials do not possess, and therefore is widely used as a new type of material.

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Purpose:

Activated magnesium oxide is an important raw material for preparing high-performance fine inorganic materials, electronic components, inks, and harmful gas adsorbents. It is expected to be developed as a material under harsh conditions such as high temperature and high corrosion. It can also be used as a filler for paint, paper, and cosmetics, as well as a filler and reinforcing agent for plastics and rubber, and as an auxiliary material for various electronic materials. Light burned magnesium oxide is a type of magnesium oxide obtained by calcining natural magnesite ore, brucite, and magnesium hydroxide Mg (OH) 2 extracted from seawater or brine at a temperature of 700-1000 ℃.

Lightly burned magnesium oxide

The price of lightly burned magnesium powder is used in the chemical industry to produce magnesium sulfate, magnesium nitrate, magnesium hydroxide, etc. It is also used in the pharmaceutical industry to prepare antacids and laxatives. In the food processing industry, it is mainly used as a decolorizing agent. In the glass magnesium building materials industry, as the main raw material in glass magnesium materials, it is mainly used in the production of glass magnesium material products. When lightly burned magnesium oxide is mixed with magnesium chloride or magnesium sulfate aqueous solution in a certain proportion, it can gel and harden into a hardened body with certain physical and mechanical properties. Therefore, it is called magnesium cement. Magnesium cement, as a new type of cement, has the advantages of light weight, high strength, fire resistance, thermal insulation, energy conservation and environmental protection. It can be widely used in building materials, municipal engineering, agriculture, machinery and other fields, such as decorative boards, partition walls, etc. Boards, sanitary ware, suspended ceilings, floor tiles, ventilation ducts, sewage manhole covers, fireproof doors and windows, Fireproof board, artificial stone, imitation wood products, roofing materials, handicrafts, abrasive molds, stoves, fireworks fixative, etc.