The size of these particles lies between 0.1 to 100 μm. Microparticles are considered to have an increased surface-to-volume ratio than at a macroscale, therefore, depict a different behaviour. The larger microparticles can be viewed without any assistance; however, the smaller particles require magnification to be seen. Even with the visibility of the particles, the structure of the particle is considered to be too small for a human eye to see. The industrial microparticle is a magnetic core that is surrounded by the second material. These particles are mixed with other substances which are used for specified applications. The applications vary as it depends on the properties of the outer shell. They can be used anywhere from separating valuable metals from rock, leading to the purification of water. As stated above, microparticles have a larger surface area in comparison to various other materials, which causes certain particles to have different reactive behaviour on small scales in comparison to large scales. The most common reactions originate from certain metals. Upon exposure to these metals to wear and friction, they can become highly volatile and even explosive in certain cases. The use of microparticles is very diverse as it is being used as conductive coatings, manufacturing of glass, formation of lubricants, nuclear reactors, metallic alloys, and structural materials. It is also used as metal composites for bearings and liners engines. Microparticles are also used as support materials for the composition of precision metal powder catalysts which are used to increase the conductivity. It is also used to create a metal matrix for reducing friction. Microparticles are also used as a chromatography medium. Because of its applications, it is also used as an adsorbent in the defluoridation of drinking water. They are also used as air filters in vehicles while enhancing the efficacy of filters by absorbing and decomposing carbon monoxide leading to a decrease in environmental pollution.