Magnesium oxide powder, an ionic compound, was introduced

Magnesium oxide powder (MgO) is a kind of ionic compound, also known as bitter soil, lamp powder, odorless, tasteless and non-toxic, is a typical alkaline earth metal oxide, it is a kind of white powder at room temperature, melting point is 2852℃, magnesium oxide in nature mainly exists in the form of square magnesite, is the main raw material of industrial magnesium smelting.

With the development of nanomaterial technology, a new type of inorganic material - nano magnesium oxide has been developed rapidly. Nanometer magnesium oxide particle size of 1-100nm, mainly used in catalyst, ceramic powder, cosmetics and other fields, has a huge application prospect. Next, we briefly introduce some preparation methods of nanometer magnesia powder.

In general, according to the state of powder preparation, various methods can be divided into solid phase method, liquid phase method and gas phase method

Solid - phase method mainly includes mechanical comminution and solid - phase chemical reaction.

Mechanical crushing refers to the use of impact, collision, friction and other external forces between the medium and large particle raw materials to break large particle raw materials into ultrafine powder, mainly including mechanical ball milling method. This method is mainly used to prepare nanomaterials with high brittleness in actual industrial production, but it is difficult to break raw materials below 100nm by mechanical grinding method, and the shape of the particles is irregular and the size distribution is wide, so it is difficult to truly meet the requirements of industrialization.

Solid phase chemical reaction refers to the reactants in accordance with the predetermined proportion of mixing, then grinding calcination and grinding steps to obtain a method of ultrafine powder, it is a traditional powder preparation method, the more commonly used methods include room temperature solid phase reaction method and low temperature solid phase reaction method.

The development of gas phase method is relatively late, mainly refers to the use of organometallic compounds and other reheated conditions to volatilize into the gaseous state, and then through the reaction between the gas phase reactants to precipitate the product. Gas phase method has many advantages, such as easy to control the reaction conditions, easy to prepare nanoparticles with uniform particle size and high purity, but its high cost, large investment, practical industrial application is difficult. The gas phase method mainly includes gas phase deposition (CVD), plasma method, etc.