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Magnesium oxide is an inorganic substance with a chemical formula of MgO, an oxide of magnesium, an ionic compound. It is a white solid at room temperature. Magnesium oxide exists in nature in the form of periclase and is a raw material for magnesium smelting.
Magnesium oxide is commonly known as bitter soil, also known as magnesia. Magnesium oxide is an alkaline oxide, which has the same properties as alkaline oxides and is a gelling material. White powder (light yellow for magnesium nitride), odorless, tasteless, non-toxic, is a typical alkaline earth metal oxide, chemical formula MgO. White powder, melting point is 2852, boiling point is 3600, and relative density is 3.58 (25). Soluble in acid and ammonium salt solution, insoluble in alcohol. The solubility in water is 0.00062 g/100 mL (0 degC)
Classification: There are two types: light magnesium oxide and heavy magnesium oxide. Lightweight and bulky, white amorphous powder. Odorless, tasteless and non-toxic. The density is 3.58g/cm3. It is hardly soluble in pure water and organic solvents, and its solubility in water increases due to the presence of carbon dioxide. It can be dissolved in acid and ammonium salt solution. It is converted into crystals after high temperature burning. In case of carbon dioxide in the air, magnesium carbonate double salt is formed. The heavy matter is compact in volume and is white or beige powder. It is easy to combine with water, and it is easy to absorb moisture and carbon dioxide in the exposed air. It is easy to gel and harden when mixed with magnesium chloride solution.
The application of Magnesium oxide:
High purity magnesium oxide
Application areas: High purity magnesium oxide has excellent alkali resistance and electrical insulation at high temperatures. High thermal expansion coefficient and thermal conductivity have good light transmittance. Widely used as high temperature and heat resistant materials. In the ceramic field, it is used as a raw material for light-transmitting ceramic crucibles, substrates, etc., in the electrical materials and electrical fields, for magnetic device fillers, insulating material fillers and various carriers. Used as a ceramic substrate, the thermal conductivity is more than 2 times higher than that of Magnesium oxide, and the loss of electrolyte is only 1/10 of that of Magnesium oxide. It can also be used as a raw material for high-purity fused magnesia, and can be used chemically as “analytical pure” magnesium oxide.
Application field: Nano-scale magnesium oxide has obvious small size effect, surface effect, quantum size effect and macro tunnel effect. After modification, there is no agglomeration phenomenon. It has many special functions in optics, catalysis, magnetism, mechanics, chemical engineering, etc. And important application value, the prospect is very broad, it is an important new material in the 21st century. Nano-magnesium oxide is widely used in the fields of electronics, catalysis, ceramics, oil products, coatings and so on. Used in different products, they play different roles. They are used as flame retardants in the chemical fiber and plastic industries; high-temperature dehydrating agents in the production of silicon steel sheets, advanced ceramic materials, electronic industry materials, and binders and additives in chemical raw materials; Radio industry high-frequency magnetic rod antennas, magnetic device fillers, insulating material fillers and various carriers; refractory fibers and refractory materials, magnesia chrome bricks, fillers for heat-resistant coatings, high-temperature, insulation-resistant meters, electrical, cables, optical materials, and Steelmaking; electrical insulator materials, manufacturing crucibles, furnaces, insulating conduits (tubular elements), electrode bars, electrode sheets.
In the textile field, with the increasing demand for high-performance flame-retardant fibers, synthetic new high-performance flame-retardants provide ideal materials for the development of functional fabrics. Nano-magnesium oxide is often used together with wood chips and shavings to manufacture refractory materials such as light weight, sound insulation, heat insulation, refractory fiberboard, and cermets. Compared with some traditional phosphorus- or halogen-containing organic flame retardants, nano-magnesium oxide is non-toxic, odorless, and has a small addition amount. It is an ideal additive for the development of flame-retardant fibers. In addition, nano-magnesium oxide used in fuel has a strong ability to clean and inhibit corrosion, and has a good application prospect in coatings.
Due to the excellent characteristics of Magnesium oxide in electrical, thermal and mechanical properties, it is widely used in the field of semiconductor electronic packaging.
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