Active magnesium oxide is also called lightly burned magnesium oxide or caustic magnesium oxygen, is calcined below 900 ℃ magnesium compounds formed magnesium oxide, the chemical activity of magnesium oxide can be expressed by the iodine absorption value (adsorption performance index), the greater the chemical activity, the greater the iodine absorption value, the more lightweight. Iodine absorption value in 120–180mg/g is called high activity magnesium oxide, iodine absorption value in 50–80mg/g is called medium activity magnesium oxide, iodine absorption value in 19–43mg/g is called low activity magnesium oxide. 43mg/g is called low activity magnesium oxide.
Active magnesium oxide is generally relative to heavy magnesium oxide, because the activity of solid material is proportional to its surface area, also some people use the size of its surface area to express the activity, so the introduction of specific surface (unit mass of the surface area owned by the material) depending on the specific volume (ml/g) as the reciprocal of the stack density. Generally speaking, the high activity of magnesium oxide is ultra-micro powder, refers to the particle size in 10-1000nm, due to the ultra-micro particle size is very small, often in the magnetic, electrical, acoustic, thermal and sensitivity of conventional materials do not have special properties, so as a new material is widely used, with citric acid activity value, the activity expressed as 12-25, the smaller the value, the higher the activity. The activity expressed by iodine absorption value is 80-120 (mgI/100gMgO), the specific surface area is between 5-20, and the apparent specific volume is between 6-8.5ml/g. Due to its large specific surface area, it has extremely high chemical activity and physical adsorption ability, good sintering performance, low temperature sintering without the use of sintering additives, and is a highly functional fine inorganic material for preparation.
With the development of science and technology and national economy, the application of active magnesium oxide will be more and more widespread, and the demand will be further increased, high active light magnesium oxide is made of soluble magnesium salt and dolomite as raw material, finely processed by advanced technology. Product particle size is fine, good dispersion compatibility, high iodine absorption value. The high activity quality is stable, and the use performance is good. Widely used in neoprene, fluorine rubber, butyl rubber, chlorinated polyethylene
(CPE), polyvinyl chloride (PVC) plastics and adhesives, advanced ink, paint, etc. Used in rubber cable, mining cable, marine cable and other industries, it can make the cable improve the performance of anti-corrosion, acid resistance, high temperature resistance, etc., and improve the stability of work under harsh conditions.
Activated magnesium oxide can also be used as water fluoride adsorbent, the current rural drinking water has high fluoride, high arsenic, bitter and salty, untreated IV and super IV surface water and other water quality problems, especially the water fluoride exceeds the standard, will seriously cause fluorine poisoning, greatly endangering people\’s health. Using the adsorption of active magnesium oxide, it can favorably remove the fluorine in water and solve the water safety.