Magnesium oxide (MgO) is an ionic compound, also known as magnesia, light powder, odorless, non-toxic, is a typical kind of alkaline earth metal oxides, which is a kind of white powder at room temperature, the melting point is 2852 DEG C, Magnesium Oxide in nature mainly exist in the form of periclase is mainly. The raw material of magnesium smelting industry.
This paper will briefly introduce some special morphologies of Magnesium Oxide with spherical, flaky and Magnesium Oxide whiskers.
1. Spherical Magnesium Oxide
Because spherical powder is easy to achieve close packing, so its compressive strength is strong, and its isotropy is stable. Therefore, the spherical Magnesium Oxide is mainly prepared by two ways.
The precursor of spherical Magnesium Oxide was prepared by using magnesium salt as the raw material, and the spherical Magnesium Oxide was obtained by heat treatment of the precursor.
After mixing the Magnesium Oxide powder with the solvent and adhesive, spherical Magnesium Oxide was formed by mechanical molding. After heat treatment, the spherical Magnesium Oxide products were obtained.
2, flaky Magnesium Oxide
The flake Magnesium Oxide has two dimensional structure, which is easy to be realized in the preparation process. The application of flaky Magnesium Oxide can increase its contact area with other materials, making it easier to perform its performance. For the preparation methods of flaky Magnesium Oxide, all kinds of reports are basically made of plate-like magnesium hydroxide precursors by precipitation method. After calcination, the flaky Magnesium Oxide is obtained.
3, Magnesium Oxide whisker
A whisker is a needle like or fibrous crystalline body with very small diameter and very small defects in itself. The properties of whiskers include the size of whiskers, the strength of whiskers and the surface chemistry of whiskers. Magnesium Oxide whisker as multifunctional inorganic material, has good heat resistance, insulation resistance, alkali resistance, stability and reinforcing characteristics, and can use resin, cement and other materials is enhanced with the superior, and it also can be used as adsorbent, insulation materials, sound-absorbing materials, corrosion resistant materials, flame retardant materials unsaturated polyester and thickening agent and reinforcing agent, its use more widely.