Ultrafine magnesium oxide is a new type of particulate material, white powder in appearance, high purity, large specific surface area, composed of very fine grains, non-toxic, odorless, good dispersion, relative density of about 3.58 (25 ℃). Melting point 2852℃, boiling point 3600℃. Difficult to dissolve in water, insoluble in alcohol, soluble in acid or ammonium salt solution. It can be transformed into crystals after being burned at a high temperature above 1000℃. After modification treatment, no agglomeration phenomenon, in the optical, catalytic, magnetic, mechanical, chemical and other aspects of many special functions and important application value, the prospect is very broad, is the 21st century important new materials.
Ultrafine magnesium oxide generally has the following uses:
(1) paint, plastics, rubber and other fillers: ultrafine magnesium oxide can be used as fillers for paint, paper and cosmetics, fillers and reinforcing agents for plastics and rubber and auxiliary materials for various electronic materials due to its high dispersibility.
(2) High-performance ceramics: ultrafine magnesium oxide has good sintering properties. Without the use of sintering additives can be realized in the low temperature sintering, made of highly dense fine crystal ceramics or multifunctional magnesium oxide film, can be expected to be developed for high temperature, high corrosion and other harsh conditions of the cutting-edge materials.
(3) Wave-absorbing materials: due to high activity and high dispersion, ultrafine magnesium oxide is easy to composite with polymer or other materials. This composite material has good microwave absorption properties, while not so much as to make the raw material strength, toughness and other indicators of the reduction, and the addition of fibrous magnesium oxide has a complementary role.
(4) Adsorbents and catalysts: ultrafine magnesium oxide has a large specific surface area, is the preparation of high-function fine inorganic materials, electronic components, inks, harmful gas adsorbents are important raw materials.
(5) Flame retardant materials: ultrafine magnesium oxide has good flame retardant effect, can be used with wood chips, shavings together with the manufacture of lightweight, sound insulation, insulation, fire-resistant fiberboard and other fire-resistant materials, as well as metal ceramics.
(6) Others: fuel additives, cleaning agents, antistatic agents and anti-corrosive agents, electrical insulator materials, the manufacture of crucibles, furnaces, insulated conduit (tubular components), electrode rods, electrode sheet and so on.
(7) fabrics: the use of MgO compound formulated antistatic finishing agent on cotton fabrics and polyester fabrics for functional finishing, antistatic performance test results show that the finishing fabrics have a better antistatic effect.
Magnesium oxide is used as an excellent filler and reinforcing agent for rubber products, can improve the quality and strength of rubber products, can also be used in the manufacture of high-grade glass products, adhesives, paints and household chemicals, ultrafine magnesium oxide has a light weight and good activity, can be used as filler for paper, chlorine rubber and fluoroelastomers accelerator and activator, there is an important value of the use of plastics industry.