MICA POWDER &
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%.
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.
Mica is transparent, optically flat, colourless, resilient and
incompressible. It is waterproof and moisture-proof.
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.
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.
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.
Mica is relatively soft, flexible elastic and tough having high
tensile and flexural strengths and modules of elasticity.
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.
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.
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.