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Continuing the technology that started our holding company, Perfection Mica Company, more than 65 years ago, we offer the finest quality mica for use in the electrical industry.

Mica has a high dielectric strength and excellent chemical stability, making it a favored material for manufacturing capacitors for radio frequency applications. It has also been used as an insulator in high voltage electrical equipment. It is also birefringent and is commonly used to make quarter and half wave plates.

Of nine different types of mica, two are important in the electrical/electronic industry in such applications as electron tubes, capacitors, generators, and insulating spacers for semiconductors. These are muscovite (potassium mica) and phlogopite (magnesium mica).

Mica is very stable at high temperatures, and possesses some attractive electrical properties. It is flexible, chemically inert, and has good mechanical strength perpendicular to the lamina.

Phlogopite mica has inferior electrical characteristics compared to muscovite, but offers other properties that are superior. Phlogopite is a bit softer and weaker then muscovite, however it has the advantage of being able to withstand higher temperature-up to 850°C and more. Muscovite handles up to 600°C before it suffers physical changes.

We provide mica parts fabricated to your specifications and drawings. For a more in depth discussion of the electrical and physical characteristics of Mica please refer to our literature section for Mica Manual K-13A.

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