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Magnesium oxide is bending, pressure, high intensity, gas hard, cementitious material, widely used in national defense, medicine, chemical industry, papermaking, shipbuilding and other industries. In the building materials industry can be sub-board tire making, particle board, insulation pillars, railings, artificial marble, asbestos, ordinary tile, wallboard, laying on the ground. As technology advances, more extensive use of magnesium oxide. Magnesium oxide is making firecrackers firecrackers special materials. Magnesium oxide (MgO) commonly known as magnesite, calcined powder, magnesium oxide powder. Density of 2.94, a white powder. Melting point 2852 °C, boiling point 3600 °C. Soluble in acid and ammonium salt, insoluble in water and ethanol. Calcination temperature of 400 °C, the surface area of 180m2 / g. 1300 °C, the surface area of only 3m2 / g. Deliquescent in the air. It is rigid gas cementing material.
Index | Trademark | ||||||||
Chemical composition% | 96 | 95 | 94 | 93 | 92 | 90a | 90B | 87a | 87b |
MgO≥ | 96.00 | 95.00 | 94.00 | 93.00 | 92.00 | 90.00 | 90.00 | 87.00 | 87.00 |
SiO2≤ | 0.50 | 1.00 | 2.00 | 3.00 | 3.00 | 4.00 | 4.00 | 5.00 | 5.00 |
CaO≤ | 1.00 | 1.50 | 2.00 | 2.00 | 2.00 | 2.00 | 2.50 | 3.00 | 3.50 |
Fe2O3≤ | 0.70 | 0.75 | 0.90 | 0.90 | 1.00 | 1.20 | 1.20 | 1.50 | 1.50 |
Loss on Ignition% | 2-3 | 3-5 | 3-5 | 3-5 | 3-5 | 3-5 | 3-5 | 3-5 | 3-5 |
Magnesium oxide