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About mica

Mica, a mineral of crystalline formation, is easily one of the most important insulation materials for the electrical industry. Its exceptional dielectric, thermal and mechanical properties, as also its remarkable resistance to glow heat, make it virtually irreplaceable by any other material. For over 2,000 years, India has been recognised as one of the world's richest sources of natural mica.

The two chief varieties of mica splittings for the electrical industry are Muscovite (Ruby/Green) and Phlogopyte (Amber).
Natural mica block
natural mica block

Muscovite mica is a hydrous potassium aluminium sillicate. Compared with the Phlogopyte variety, it is harder and has better electrical properties. Calcination temperature is reached at about 600°C.
muscovite mica
muscovite mica splittings


Phlogopyte Mica is a hydrous potassium magnesium aluminium silicate. Here the calcination temperature is reached at about 800°C. Generally speaking, Phlogopyte mica is softer than Muscovite variety - this makes it more suitable for use in flush type commutators.
phlogopyte mica
phlogopyte mica splittings