Why is Mica Used for Industrial Thermal And Electrical Insulation?


Mica is a group of minerals that occur naturally in the earth’s crust in igneous rock. There are 37 varieties of mica available, but two varieties most commonly used for industrial applications are phlogopite mica and muscovite mica. Outstanding physical and chemical properties such as high thermal resistance, high dielectric strength, high resistance to moisture, lightweight, and exceptional mechanical properties make it an ideal material to be used for industrial thermal and electrical insulation. Have a look at the key properties of mica material.

 

Thermal insulation

 

Mica is stable at high temperatures. Muscovite mica sheets are stable up to 500 °C (932 °F) whereas phlogopite mica sheets are stable up to 900 °C (1,650 °F). Due to exceptional thermal insulation abilities, mica forms a wide range of insulation products. Rigid mica sheets are used in furnace construction, flexible mica sheets are used in aerospace and automotive industries, mica gasket and mica insulation are used for the thermal insulation of automotive components, and mica laminates are used as flame-retardant barriers.

 

Electrical insulation

 


Mica has exceptional dielectric capability. It has a dielectric strength of up to 20 kV/mm. A vast range of mica-based products such as mica tape, mica paper, and mica board is used for electric insulation in various industries. Mica tape is the most common product used in the electrical industry for the electrical insulation of high voltage wires. Mica is also used for the wiring for circuits, transformers, and starter motors and manufacturing of the key components of circuit boards.       

 

Chemically inert



Mica is chemically inert. It does not react with other elements. This makes mica non-combustible, halogen-free, and flame resistant. It does not produce harmful gases and fumes on burning. Mica cable used for the insulation of electric wire can delay the spread of fire and reduce the release of toxic gases in case of unexpected events.

 

These are the three main properties of mica. If you are looking to buy certified mica sheets, Axim Mica is an ISO: 9001 2015 certified manufacturer and supplier of mica-based insulation products.

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