GROUND MICA POWDER & FLAKES
Mica
is a generic term applied to a group of a complex aluminium silicate minerals
having different chemical and physical properties. It is listed by the
ACGIH with a recommended TLV of 6 mg./cu.meter in which toxic impurities
are not present e.g. Inhalable silica (quartz) less than 1%.
Muscovite Mica (theroretical Chemical formula=KAI2(AISi3O10)(OH)2) is a complex aluminosilicate minerals that have a sheet or plate-like structure with remarkable cleavage parallel to the direction of the large surface that allows it to be split or delaminated into thin films that are transparent, flexible, elastic, and tough. It has an outstanding physical, chemical, electrical, thermal and mechanical properties which are not found in any other products either natural or synthetic.
PHYSICALLY : Mica is transparent, optically flat, colourless, resilient and incompressible. It is waterproof and moisture-proof.
CHEMICALLY : Mica is a complex hydrous silicate of aluminium containing potassium and traces of several other elements. It is stable and practically inert (except to hydrofluoric acid and concentrated sulfuric acid) and virtually unaffected by the action of heat, light, water, oil, solvents, alkalis and other chemicals.
ELECTRICALLY : Mica has a unique combination of high dielectric strength and a uniform dielectric constant. It is therefore able to withstand exposure to electrical discharge without oxidizing and serves as an excellent insulator.
THERMALLY : Mica is infusible and non-combustible and has low heat conductivity and is not affected by extended exposure to electrical discharge without oxidizing and serves as an excellent insulator.
MECHANICALLY : Mica is relatively soft, flexible elastic and tough having high tensile and flexural strengths and modules of elasticity.
Mica Flakes is mica scrap ground into sizes ranging from 2 mesh to 8 mesh. This material is prepared mainly by the means of rotary hammer crushing machine in which the mica is literally beaten till such time that the required size is not achieved and the material passes out from graded sieves attached therein.
1)MUSCOVITE
MICA FLAKES FOR PEARLESCENT PIGMENTS
MUSCOVITE MICA FLAKES of superior quality having low iron contents are
used in large proportion in production of PEARLESCENT PIGMENTS, because
of its reflective and refractive properties and its ability to reproduce
artificially a "mother of pearl" or nacreceous colours from silver white
through all shades of the rainbow varying from a silky lustre to a glittering
sparkle. Mica have high refractive index (greater than sparkle. Mica have
high refractive index (greater than 2.5) and a good chemical, mechanical
and thermal stability.
2)MICA
FLAKES FOR OIL-WELL DRILLINGS/MUD CHEMICAL
MICA FLAKES have been preferably used in water-based and oil-well drillings
operations as an additive mud chemical to prevent loss of circulation
and seepage. Mica is specially added to seal-off the lost circulation
zones. The platy structure of mica facilitates the overlapping of particles
to form a layer or wall and acts as a sealent that bridges the openings.
The use of Mica helps to seal porous formations and contributes to regain
circulation keeping the solids in suspension.
MICA MANUFACTURING CO. PVT.LTD.
3C,
Camac Street, P.O.Box
9052,
Kolkata 700 016 INDIA
Tel: +91-33-40663006
E-mail :mica@micamaf.co.in / mmc@micamafco.co.in