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Mica

In fact it is an inorganic solid mineral that can be found in nature, and is crystalline in structure. In the mica group, Muscovite and Phlogopite are the most common that can withstand high temperatures. Phlogopite can withstand temperatures up to 1000˚C, whereas Muscovite can tolerate up to 700˚C.

Mica has great dielectric strength. Dielectric strength is the ability of a material to tolerate high voltage without breaking down. It has a low power loss factor. It is a good insulator, and has high electrical resistance.

Because of their dielectric, insulating, and heat-tolerating properties. They are used in:

– heating appliances like hot plates, soldering irons, regulators, pyrometers;

– lighting equipment like neon lights, incandescent lamps;

– in Electrodes;

– in the manufacture of welding electrodes a core of steel wire is coated uniformly with a ‘flux’ comprising Mica as a lagging compound.

This mineral is added to the ‘flux’ with which welding electrodes are coated as binders, extrusion agents and pigments to aid slag formation, weld pool protection and arc stabilization.

Mica

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