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Mica is a generic term applied to a group of Complex aluminosilicate minerals having a sheet or plate like structure with different composition and physical properties. All mica form flat six-sided monoclinic crystals with a remarkable cleavage in the direction of large surfaces, which permits them to easily split into optically flat films. When split into thin films, they remain tough and elastic even at high temperature. Mica possesses some of the most outstanding combinations of chemical,
physical, electrical, thermal and mechanical properties, which are not found in any other product.Uses Physically: Mica is transparent, optically flat, easily splittable into thin films along its cleavage, colorless in thin sheets, resilient and incompressible. Chemically: It is a complex hydrous silicate of aluminum, containing potassium, magnesium, iron, sodium fluorine and/or lithium and also traces of several other elements. It is stable and completely inert to the action of water, acids (except hydro-fluoric and concentrated sulphuric) alkalis conventional solvents, oil and virtually unaffected by atmospheric action. Electrically: Mica has the unique combination of great dielectric strength, uniform dielectric constant and capacitance stability, low power loss (high Q factor), high electrical resistively and low temperature coefficient and capacitance. It is noted for its resistances to arc and corona discharge with no permanent injury. Thermally: Mica is fire proof, infusible, incombustible and non- flammable and can resist temperatures of 600-C to 900-C, depending on the type of mica. It has low heat conductivity, excellent thermal stability and may be exposed to high temperatures without noticeable effect. Mechanically: Mica is relatively soft and can be hand cut, machined or die-punched. It is flexible, elastic and tough, having high tensile strength. Typical End uses of natural sheet mica : Electrical Apparatus Electric Heating Appliances Electrical Control Electrical Lighting Equipment Industrial Electric Heating Appliances Mechanical Uses Miscellaneous Electrical Uses Radio, Radar, Television etc. Motors and Generators Transformers MICA ( Products) 1. Clear 2. Clear and slightly stained 3. Fair stained 4. Heavy stained 5. densly stained 6. Black Dotted 7. Black Spotted 8. Black Stained 9 .Densly black and red stained |
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