What are the properties of magnesium?

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Physical properties: white powder easily, odorless, tasteless, this product does not dissolve in water and ethanol, melting point 2852 ℃, boiling point 3600 ℃, magnesium oxide has a high degree of fire-resistant insulation. High-temperature burning above 1000 ℃, can be transformed into crystal, rose to more than 1500 ℃ are as dead burned magnesia or sintered magnesia. The surface area of MgO is very important, magnesium oxide surface area by BET method of testing data only detected results is authentic, there are a lot of domestic equipment can make a direct comparison method of testing, and now China has also been eliminated. Unity at home and abroad BET multi-point BET method, both foreign and domestic standards out the specific surface area measured by BET test method is based, see China national standard (GB / T 19587-2004) - Principles of gas adsorption BET Determination of specific surface area of solid material way. In fact, the specific surface area is more time-consuming inspection of work, due to the different adsorption capacity of the sample, some samples of the test may take a whole day, if not fully automated testing process, that testers can not always have to leave, and to high concentration, observation instrument panel, control knobs, all too easy to cause testing process will fail, this will waste a lot of valuable time testers. F-Sorb 2400 analyzer is the real specific surface area BET method can achieve detection instruments (both direct comparison method), is more important than the surface area of F-Sorb 2400 analyzer is so far the only fully automated intelligent than the surface area of detection equipment, the test results are highly consistent with international stability is also very good, while reducing human error and improve the accuracy of test results.
Chemical properties: Magnesium is an alkaline oxide, a common gender with alkaline oxide
Exposed to the air, ready to absorb water and carbon dioxide has become basic magnesium carbonate , light and heavy goods quality products faster, with water generates hydroxide, showed a slightly alkaline reaction, saturated aqueous solution of pH 10.3. Soluble in acid and ammonium salt is insoluble in water, the solution is alkaline. Insoluble in ethanol.
MgO +2 HCl === MgCl2 + H2O
MgO + NH4Cl === MgCl2 + NH3 ↑ +2 H2O

And the role of water is slow to produce magnesium hydroxide
In the visible and near-ultraviolet range has a strong refraction of.

Category: Sub-light magnesium oxide and magnesium oxide are two heavy. Light volume fluffy white amorphous powder. Odorless non-toxic. Density 3.58g/cm3. Insoluble in water and organic solvents, solubility in water increased due to the presence of carbon dioxide. Can be dissolved in acid, ammonium salt solution. Burning at high temperature into a crystal. Case of carbon dioxide in the air generated magnesium salts. Heavy volume of close, white or beige powder. And water sensitive compounds, Lo Chi in the air is easy to absorb moisture and carbon dioxide. Easily mixed with magnesium chloride solution hardening gel.

Application: Determination of the sulfur system and pyrite and steel in sulfur and arsenic. White pigment used as the standard. Light magnesium oxide is mainly used for preparation of ceramic, enamel, refractory crucible and the refractory bricks of raw materials. Also used as a polishing agent adhesive url] paint] and paper fillers, chloroprene rubber and fluorine rubber accelerator and activator. Solution mixed with magnesium chloride , magnesium oxide can be made of the water transfer. Medicine used as antacids and laxatives for too much stomach acid and duodenal ulcer disease. Used as a catalyst in the chemical industry raw materials and manufacturing magnesium . Also used to put glass, stained meal, Bakelite and other manufacturing. Heavy magnesium oxide grinding rice industry for the firing and semi-roller. Construction industry for the manufacture of artificial marble artificial chemical floor heat insulation plate filler plate for the plastics industry. Can also be used in the production of other magnesium salt .
Oral pharmaceutical preparation used to neutralize excess stomach acid. Commonly used preparations are: milk of magnesia - emulsion; magnesium cover film - each containing MgO0.1g,; acid powder - made of magnesium oxide and sodium bicarbonate powder and other mixed.
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