Magnesium hydroxide is dispersed actual particle dispersion. Particle dispersion is refers to the separation of powder particles in a liquid medium and spread out evenly distributed throughout the liquid phase process, mainly including wetting, reunion and stabilization of dispersed particle three phase. Both below small make up to introduce the dispersion method of the magnesium hydroxide.

1, mechanical dispersion method, etc

Mechanical dispersion is with the aid of the shear force and impact force mechanical energy to make the nanoparticles fully dispersed in a medium one way. Mechanical dispersion method has grinding and ordinary ball mill, vibration ball mill, the colloid mill, grinding, mixing machinery, such as the air. This method is the common method of a decentralized superfine powder, but easy to introduce impurities, and may change the physical and chemical properties of the powder.

2, ultrasonic method

Ultrasonic dispersion is the handles of particle suspension directly put in sound field, with proper frequency and power of ultrasonic processing, is a kind of high strength dispersion method. Ultrasonic dispersing mechanism is cavitation effect, which can produce local high temperature and high pressure, and produce a great impact and micro jet, nano powder under the action of its, the surface can be weakened, can effectively prevent the agglomeration of particles of dispersed adequately.

3, chemical dispersion method

Chemical dispersion or select one or more appropriate dispersant improve the dispersivity of the suspension, to improve its stability and rheological property. The commonly used dispersant are:

(1) small inorganic electrolytes or inorganic polymer molecular weight, such as sodium silicate, sodium aluminate, three poly potassium phosphate, etc. This kind of dispersant can occur dissociation and charged, adsorption in the surface of the powders can improve the particle surface potential, make electrostatic repulsion increases, improve the stability of the slurry. Its mechanism is the electrostatic repulsion stability.

(2) the surface active agent, this kind of dispersant is consists of two parts, and water-based pro-oil base, is the parent molecule, including long chain fatty, CTAB, etc. Mainly space steric effect, hydrophilic radical adsorbed in the surface of the powder, hydrophobic chain to solvents, to improve the rheology of slurry has a good effect.