Magnesium oxide is divided into light magnesium oxide and heavy magnesium oxide. Lightweight and loose, white amorphous powder. Odorless, tasteless and non-toxic. The density is 3.58 g/cm3. Hard to dissolve in pure water and organic solvents, the solubility in water increases due to the presence of carbon dioxide. Soluble in acid, ammonium salt solution. It is converted into crystals by high temperature burning. In the case of carbon dioxide in the air, it forms a double salt of magnesium carbonate. Heavy and compact, white or beige powder. It is easy to combine with water, and it is easy to absorb water and carbon dioxide in the exposed air. It is easy to gel and harden when mixed with magnesium chloride solution.
With the upgrading of industrialization and the demand and development of high-tech functional materials market, R&D has produced a series of high-tech fine magnesium oxide products, mainly used in advanced lubricating oil, advanced tanning base, food grade, medicine, silicon steel grade, advanced Electromagnetic grade, high-purity magnesium oxide and other nearly ten varieties.
Industrial grade light burning
Application: Mainly used in the production of magnesite products. Lightly burned magnesia and magnesium chloride aqueous solution in a certain ratio, can be gelled and hardened into a hardened body with certain physical and mechanical properties, called magnesite cement. As a new type of cement, magnesite cement has the advantages of light weight, high strength, fire and heat insulation, energy saving and environmental protection. It can be widely used in building materials, municipal, agricultural, machinery and other fields.
Advanced lubricant grade
Application: Mainly used as detergent, vanadium inhibitor and desulfurizer in advanced lubricating oil processing, which greatly improves the compactness and rheology of lubricating film and reduces ash. Lead removal and mercury removal reduce the environmental pollution of lubricating oil or fuel waste. Surface treated magnesium oxide can also be used as a complexing agent, chelating agent and carrier in the refining process, which is more conducive to product fractionation and improve product quality. Especially when heavy oil is burned, adding Mg0 can eliminate the damage of vanadium in heavy oil to the furnace.
Application: It is used as a supplement for magnesium additives in food supplements, color stabilizers, and pH adjusters as health care products and foods. It is used as a decolorizer ice cream powder pH regulator when granulated sugar is refined. As an anti-caking agent and antacid used in the fields of wheat flour, milk powder chocolate, cocoa powder, grape powder, sugar powder, etc., it can also be used in the fields of ceramics, enamels, glass, dyes and the like.
Application field: Bio-pharmaceutical field can use medical grade magnesia as antacid, adsorbent, desulfurizer, lead removal agent, complex filter aid, pH regulator. It is used as antacid and laxative in medicine, inhibition and alleviation. Excessive stomach acid, treatment of gastric ulcer and duodenal ulcer disease. Neutralizing gastric acid is strong, slow and long-lasting, and does not produce carbon dioxide.
Silicon steel grade
Application: Silicon steel grade magnesia has good magnetic permeability (ie, has a large positive magnetic susceptibility) and excellent insulation properties (ie, conductivity can be as low as 10-14 us/cm densification). The surface of the silicon steel sheet can be formed into a good insulating layer and a magnetic conductive medium to suppress and overcome the eddy current and skin effect loss (referred to as iron loss) of the silicon steel core in the transformer. Improve the insulation properties of silicon steel sheets and use them as high temperature annealing separators. It can also be used as a dephosphorization agent, a desulfurizer, and an insulating coating agent in silicon steel for ceramic materials, electronic materials, chemical raw materials, binders, and additives.
Advanced electromagnetic grade
Application areas: for wireless high-frequency paramagnetic magnetic materials, magnetic rod antennas, magnetic cores of frequency modulation components. Instead of ferrite. It can be used in the fabrication of composite superconducting magnetic materials and also in the electronic magnetic industry. As a "soft magnetic material." It is also an ideal raw material for industrial enamels and ceramics.
High purity magnesium oxide
Application: High-purity magnesium oxide has excellent alkali resistance and electrical insulation at high temperatures. High thermal expansion coefficient and thermal conductivity have good light transmission. Widely used as a high temperature heat resistant material. In the field of ceramics, it is used as a raw material for translucent ceramic crucibles, substrates, and the like, and is used for magnetic device fillers, insulating material fillers, and various carriers in electrical materials and electrical fields. The use as a ceramic substrate is more than twice as high as that of alumina, and the loss of electrolyte is only 1/10 of that of alumina. It can also be used as a raw material for high-purity fused magnesia, which can be chemically used as "analytically pure" magnesium oxide.
Application: Nano-sized magnesia has obvious small size effect, surface effect, quantum size effect and macroscopic tunneling effect. It has no agglomeration after modification, and has many special functions in optics, catalysis, magnetism, mechanics and chemical industry. And the important application value, the prospect is very broad, is an important new material in the 21st century. Nano-magnesia has a wide range of applications in electronics, catalysis, ceramics, oils, coatings and other fields.
Adding 50-90 g of magnesium oxide per day to the cow's grain or adding 0.5% of the concentrate can not only supplement the deficiency of magnesium in the diet to prevent the occurrence of magnesium deficiency, but also is an excellent rumen buffer. Rumen fermentation, and can increase the absorption of milk synthesis precursors in the breast, increase milk production and milk fat percentage. According to foreign reports, the addition of 0.5% magnesium oxide to dairy concentrate supplements can increase the milk yield by 1.6 kg, increase the milk fat percentage by 0.145 percentage points, and help to increase feed intake. Adding magnesium oxide to dairy cow diet can prevent heat stress. Magnesium ions can work together with sodium and potassium ions to maintain the balance of intracellular and extracellular osmotic pressure, and alleviate the response of dairy cows to heat stress, thus improving the intake of dairy cows in summer. Quantity, to maintain milk production does not decline. It is also recommended that in the case of heat stress, the amount of magnesium oxide in the diet should be increased to compensate for the loss of magnesium in the body to ensure and maintain normal milk production. Both cows and beef cattle have a good balance mechanism to handle excess magnesium ions, so an appropriate increase in the amount of magnesium oxide does not adversely affect cattle.
Single crystal magnesia refers to a MgO content of 99.95% or more, and has extremely high and low temperature resistance (high temperature 2500 ° C, low temperature -270 ° C) corrosion resistance, insulation and good thermal conductivity and optical properties, colorless and transparent crystal . The main parameters are as follows:
Lattice constant: a = 4.212
Molecular weight: 40.311
Density (g/cm): 3.65 g/cm^3
Thermal expansion coefficient (×10-7/°C) (25°C): 138
Thermal conductivity (cal/cm/sec/°C) (25°C): 0.06
Specific heat (cal/g.°C): 0.209
Mohs hardness: 5.5
Refractive index: No = 1.74 (λ = 0.633 μ)
Transmittance: light wavelength 200 ~ 2000 transmittance 92%
When the light wavelength is 2.5 to 7 microns, the transmittance is greater than 92%.